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Table of Content
05 April 2012, Volume 31 Issue 04
      Research development in chemical-looping combustion
    WEI Guoqiang1,2,HE Fang1,HUANG Zhen1,ZHAO Kun1,LI Xin’ai1,2,LI Haibin1
    2012, 31(04):  713-725. 
    Abstract ( 3374 )  
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      Chemical-looping combustion(CLC)is a new type of combustion technology with inherent CO2 separation,high efficiency,and low NOx emission. The basic principle of CLC was introduced. Thecurrent,reactors system analysis and simulation,coupling with other processes,and extension of CLC. In conclusion,5 key directions in CLC development are pointed out,which are preparation,discussion on the reaction process and mechanism,design and optimization of reactor,systematic analysis and numerical simulation,expansion the scope of CLC application. by screening excellent oxygen carriers situation and existing problems were summarized according to the preparation and screening of oxygen carriers
    Process and prospect for the methodology of heat exchanger network synthesis in China
    HUO Zhaoyi1,YIN Hongchao1,ZHAO Liang1,DU Jian2
    2012, 31(04 ):  726-731. 
    Abstract ( 3011 )  
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    Heat exchanger network is a heat recovery system in a industrial plant,which plays an important role in reducing energy consumption and increasing energy utilization ratio. The design method for heat exchanger network has been one of the hot worldwide research subjects. In last 30 years,many research studies by domestic researchers have been carried out on this topic. Based on the reports published in China,the domestic progress in the field of synthesis method is introduced. After a review of several groups of approaches,such as pinch design methods,mathematical programming methods and optimization algorithms,the main research contents and difficulties are analyzed and summarized. Finally the main researching focus and developing direction on simultaneous synthesis method and global optimization algorithm are pointed out to improve theoretic study and practical application.
    Solubility of CO2 in ionic liquids——measuring and modeling methods
    DING Jing,XIONG Yan,YU Dahong
    2012, 31(04):  732-741. 
    Abstract ( 3410 )  
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    Solubility of CO2 in ionic liquids(ILs)is the most important data in the research on CO2 captured ILs,while the accurate data come from two sources:experimental determination and modeling methods. This article summarizes six kinds of experimental methods including pressure measuring,weight measuring,combined pressure-weight measuring,CO2 flow measuring,static method,and chromatography method. Meanwhile,this contribution aims to review the different modeling approaches that have been used to predict solubility of CO2 in ILs according to the “molecular model” used to describe the ILs in the different models,highlighting the most important efforts done in the last years.
    Research Progress of Laser Induced Fluorescence an
    LUO Peicheng,ZHAO Suqing,XIANG Guozhao,JIAO Zhen,ZHOU Jiancheng
    2012, 31(04):  742-748. 
    Abstract ( 2025 )  
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    After the introduction of fundamental principles of Laser Induced Fluorescence(LIF)measurement technique,the progress of the key elements of LIF technique,including laser,fluorescence tracer and the camera is reviewed according to temporal and spatial resolution. Then the application of LIF in the field of liquid mixing and mixing-sensitive reactive flow is summarized. The trends of LIF measurement technique are also pointed out. How to choose the right high-speed camera in accord with the laser is the main factor that determines the temporal and the spatial resolution of LIF measurement technique in the study of mixing. In the meantime,the application of LIF in the R&D of industrial processes will depend on how to achieve high-precision test with the miniature and low-cost LIF experimental system.
      Experimental study on the heat transfer enhancement of tubes with
    rotor assembly inserts
    PENG Wei,YAN Hua,GUAN Changfeng,DING Yumei,YANG Weimin
    2012, 31(04):  749-753. 
    Abstract ( 1837 )  
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      The effects of rotor assembly with helical lobe and grooved helical lobe on heat transfer,flow friction and thermal performance characteristics in a round tube were experimentally investigated. The results showed that both heat transfer rate and friction factor associated with rotor assembly were consistently higher than those without rotor assembly. The Nusselt number with helical lobe rotor assembly and grooved helical lobe rotor assembly increased 1.06—1.26 and 1.03—1.15 times than that in the plain tube respectively. The friction factor with helical lobe rotor assembly and grooved helical lobe rotor assembly increased 60%—68% and 36%—51% than that in the plain tube respectively. Considering both heat transfer rate and friction factor,the performance evaluation criteria(PEC)of two kinds of rotors were compared,the result indicated that grooved helical lobe rotor assembly had a better thermal performance characteristic.
    PILF study on droplet size distribution in gas-liquid jet reactor
    CHEN Wenwu1,BI Rongshan 2,LIU Zhendong1,FENG Min2,TAN Xinshun2,ZHENG Shiqing2
    2012, 31(04):  754-757. 
    Abstract ( 2477 )  
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    Gas-liquid jet reactor is a reactor with high intensity. The droplet size scale and distribution in the reactor have crucial effects on the yield and selectivity of reactions. In this paper,experimental equipment was established for measuring droplet size distribution in a gas-liquid jet reactor. The technique of PLIF(Planar laser induced florescence)was used to investigate the droplet size distribution in the jet reactor under different gas and liquid flow rates. The result shows:①In the case of constant liquid flow rate,the jet inside the mean droplet diameters decreases and the distribution of droplet diameters becomes narrower with the increasing of gas flow rate. ②In the case of constant gas flow rate,the mean droplet diameters became smaller and the distribution range became narrower with the increasing of liquid flow rate.
    Separation of methanol-acetonitrile by batch extractive distillation with aniline as solvent
    YU Yang,BAI Peng,LI Guangzhong,YIN Kun,ZHUANG Qionghong
    2012, 31(04):  758-762. 
    Abstract ( 3185 )  
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    In this paper,aniline was proposed as the solvent for the separation of the azeotrope methanol-acetonitrile by batch extractive distillation and the process was studied. Aniline was selected as the suitable solvent on the basis of the law of similarity and dissolvability,combined with VLE simulation by ChemCAD software and the VLE experiments. The results show that aniline as the solvent could break the azeotrope and the effects of aniline were better than NN-dimethylformamide(DMF). The Wilson model was used in VLE simulation. The experiment on the separation of the azeotrope methanol and acetonitrile by batch extractive distillation was carried out with a packed column with 33 theoretical plates among which 3 theoretical plates are in rectifying and recovery section and 30 theoretical plates in extractive distillation section. With the reflux ratio of 4,and the solvent mass ratio of 2.5∶1,the product purity of methanol reaches 98.97%,which is higher than the value of 95.76% when DMF was used as the solvent. It indicates that the extractive distillation with aniline as solvent is more suitable for the separation of azeotrope methanol-acetonitrile.
    Research on skim milk ultrafiltration with a reciprocating rotating hollow fiber membrane module
    ZHANG Jielin,FAN Hongbo,WANG Shen,YANG Tianlong,Lü Sihao
    2012, 31(04):  763-767. 
    Abstract ( 2692 )  
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    A novel dynamic filtration system of reciprocating rotating hollow fiber membrane was used to UF skim milk solution. The effects of the module’s geometry parameters and rotating parameters as well as the characteristics of tested fluid on the decline of membrane permeate flux were investigated. The results indicated that a better shear enhancing efficiency could be obtained while the angular velocity and/or the radial distance of membranes from the central hollow shaft were increased. The greater vectors superposition of the flow field and the membrane rotating velocity,which was reflected on a relative greater velocity gradient,would be obtained once the reciprocating rotation cycle was optimized. Otherwise,simply increasing or decreasing the rotation cycle would weaken the efficiency of shear enhancement. With the same operating parameters,the reciprocating rotation filtration was more favorable in slowing the decline of membrane permeate flux than the dead end filtration or the uni-directional rotation filtration.
    Experimental study and technology research on the extraction of heavy aromatics from methanol synthetic oil
    SHI Rongfang,ZHANG Minge,XU Changchun,CONG Shan,SUI Hong
    2012, 31(04):  768-772. 
    Abstract ( 2811 )  
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    As the methanol synthetic oil,produced from lignite gasification and other synthetic processes,has high content of aromatic,a method of the extraction of high concentration durene from methanol synthetic oil by fractionation as well as the removal of light component and heavy component has been proposed. The simulation results showed that,at atmospheric conditions,durene concentration reached 71.72% when top temperature was 129.7 ℃ and bottom temperature was 211.5 ℃ in fractionator,then under vacuum condition durene solution could be concentrated up to 91.3% by removing light fraction and removing low boiling and high boiling fractions in two rectifying columns. The feasibility of the process route was verified in a distillation column with the diameter of 30 mm.
    Research on the cooling capacity of evaporative capillary imbibition core radiant panel air-condition system
    YANG Ying,CHEN Cai,TONG Mingwei,HU Peng,LING Yunji
    2012, 31(04):  773-777. 
    Abstract ( 2365 )  
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    Pentane is used as a refrigerant in the evaporative radiation air-conditioning system. With the constant opening of throttle valve,an experiment was conducted by changing the interior temperature. Measurements obtained include the cooling capacity of the evaporative capillary imbibitions conditioning system,the radiant panel face temperature,the temperature distribution in vertical direction of the simulated space under different cooling capacity. The results show that,under the research condition,heat transfer of the evaporative wick radiation plate increases from 44 W/m2 to 91 W/m2. Even under different cooling capacity,the temperature distribution of the board is uniform,the minimum temperature is above 24℃,which can guarantee the system running without condensation. The temperature in the simulated space values are in the range of 24.5—27.5 ℃,which can meet the temperature requirements of human comfort. Thus,compared with traditional radiation air-conditioning unit,the evaporative capillary imbibitions core radiant panel air-condition system possesses higher cooling capacity and lower risk of condensation. The work in this paper can provide a theoretical basis for its further application.
    Analysis of the influence on velocity field in grading zone caused by blade structure of vertical mill classifier
    TONG Cong1,LI Shuangyue1,QI Haijun1,REN Chaofu2
    2012, 31(04):  778-783. 
    Abstract ( 1988 )  
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    Velocity field in the grading zone of vertical mill classifier is the main factor affecting the classification performance. Gas-solid two-phase flow in vertical mill classifier is non-ideal fluid. By applying the theory of viscosity and velocity gradient in fluid mechanics,the reason why a big velocity gradient would make a decline on the classification precision and the classification efficiency of a classifier is analyzed. The model of vertical mill classifier with individual rotor blade structure was built,and in which variations in velocity field,including velocity direction,velocity size and velocity gradient in grading zone,are simulated numerically and analyzed through the Fluent software. A test of structural transformation on rotor blade of vertical mill classifier was made. And the test showed that the production of the vertical mill classifier with the Z-blade rotor structure was improved by 15 t/h,and the residue on sieve of 0.08mm particles reduced by 10%,compared to the one with straight blade.
    Research progress on fuel and chemicals production from
    lignocellulose biomass
    YU Qiang,ZHUANG Xinshu,YUAN Zhenhong,QI Wei,WANG Qiong,TAN Xuesong,
    2012, 31(04):  784-791. 
    Abstract ( 2678 )  
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      Lignocellulosic biomass,which is rich in cellulose and hemicellulose,can be refined into fuels and other value-added-chemicals. It will enhance and extend the world energy and chemical base without adding additional carbon to the environment. The composition of lignocellulosic biomass feedstock was reviewed,and some typical pretreatment technologies including dilute acid,liquid hot water,steam explosion,carbon dioxide explosion,ammonia fiber explosion,alkaline,organosolv process and biological methods,were compared. Moreover,the production of cellulosic ethanol,n-butanol and biodiesel by fermentation of biomass hydrolyzate was especially discussed. It is necessary to develop efficient and environmental pretreatment technologies for the industrialization of fuel and chemicals production from lignocellulose biomass. In addition,reconstructing inhibitor tolerant strains and applying continuous fermentation or fed-batch fermentation process can reduce the manufacturing cost and enhance the fermentation efficiency.
    Preparation of 5-hydroxymethylfurfural from glucose by
    catalytic dehydration
    SHI Ning,LIU Qiying,WANG Tiejun,ZHANG Qi,MA Longlong
    2012, 31(04):  792-800. 
    Abstract ( 2548 )  
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      5-hydroxymethylfurfural(HMF)is a key intermediate for renewable fuels and fine chemicals,which can be synthesized from glucose,a typical hydrolysis product of lignocellulose. This review summarized the progress of dehydration of glucose to prepare 5-HMF,including formation mechanisms,reaction systems and catalysts. The reaction systems include ionic liquid,polar aprotic organic solvent and water contained biphasic solvent;catalysts include inorganic acid,salt,solid acid and alkali. The possible breakthrough in research was proposed to develop efficient catalysts,extraction agent,and efficient separation and purification technology.
      Progress in hydrogen production from the steam reforming of
    typical hydrocarbons
    SUN Daoan,LI Chunying,ZHANG Wei,Lü Jian
    2012, 31(04):  801-806. 
    Abstract ( 2832 )  
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      Steam reforming of hydrocarbons is one of the most important methods for hydrogen production at present. Methane,gasoline and diesel can be applied to different scale hydrogen production as typical hydrocarbons. The catalyst,process as well as mechanism and kinetics in hydrogen production from steam reforming of methane,gasoline and diesel,are reviewed. It reveals that nickel-based catalyst modification,reactor design and optimization of reaction conditions should be considered in the future development of steam reforming of methane. Catalysts for steam reforming of gasoline and diesel must have excellent tolerance to sulfur and resistance to carbon deposition. In addition,studies on mechanism and kinetics should be intensified.
    Technologies for bio-fuel production from algae
    ZHAO Xueliang
    2012, 31(04):  807-812. 
    Abstract ( 2364 )  
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    The article explains the thoughts on how to achieve efficient and cost-effective bio-energy production from algae,analyzing the technologies regarding how to raise the algae concentration,cultivate large and easy-to-harvest algae and the technology for the processing of high-water-content algae. The author believes that CO2 in the flue gas can effectively enhance the algae concentration while cutting CO2 emission and that bio-energy production from large algae is a feasible technology. The author also believes anaerobic fermentation is an efficient and feasible way for bio-energy conversion from algae.
      Isomerization to improve the low temperature fluidity of
    biodiesel from jatropha oil
    LI Ruili,YANG Siyuan,LIU Ying
    2012, 31(04):  813-819. 
    Abstract ( 2750 )  
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      The biodiesel from Jatropha oil was modified by Hβzeolite catalyst in a fixed bed reactor,and the improvement of low temperature fluidity was found. The best reaction condition is as follow:catalyst SAR is 25,reaction temperature is 250 ℃,WHSV is 1.0 h1,addition(H2O)loading is 1.2%. The solidifying point of biodiesel was decreased by up to 6 ℃. The modified products were analyzed by NMR,GC-MS characterization. The reason for improved low temperature flow properties is the isomerization of the main components of biodiesel:methyl oleate,methyl linoleate,etc.
      Research of rapid charging method with variable current for all vanadium redox battery
    YAO Dunping1,2,TANG Yaogeng1,XIE Xiaofeng2,WANG Jinhai2,WANG Shubo2,WANG Yaowu2
    2012, 31(04):  820-824. 
    Abstract ( 2665 )  
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      In order to attain rapid-charging for all vanadium redox battery,an intermittent charging method with variable current and constant-voltage was introduced. A better charging effect was achieved under a series of charging and discharging tests. Compared with the constant-current and constant-voltage charge method,the proposed method not only got the same discharge capacity,but also reduced half of charging time.  Its discharge rate reached up 100%. Moreover,its discharge capacity did not decrease after many recharge cycles.
    The development of zeolitic reforming catalyst
    GUO Chunlei,FANG Xiangchen,JIA Liming,LIU Quanjie,
    2012, 31(04):  825-832. 
    Abstract ( 2732 )  
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    The development of Pt/L, Pt/Mordenites, Pt/Beta and ZSM-5 zeolitic reforming catalysts at home and abroad was summed up, and the advantages and shortcomings of these zeolitic catalysts were also analyzed. The performance and aromatic mechanism of L and ZSM-5 reforming catalyst were particularly discussed. At last, the development trend of zeolitic reforming catalyst was discussed.
    SiO2-0.1WO3;catalytic oxidation;benzothiophene;desulfurization
    SONG Hua,MU Jincheng,WANG Deng,LI Xiumin
    2012, 31(04):  833-838. 
    Abstract ( 2353 )  
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    The W-modified SiO2 catalyst was prepared by the sol-gel method and characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), N2-adsorption specific surface area measurement(BET) and scanning electron microscopy(SEM). The catalytic oxidative desulfurization performance of benzothiophene(BT) over the catalyst taking the simulated oil of benzothiophene sulfur as feedstock, H2O2 as oxidant was studied. The effects of solvent, solvent dosage, reaction temperature, H2O2 dosage, catalyst dosage and reaction time on desulfurization performance of BT were investigated. The results show that the predominant phase of W in catalyst was WO3, the introduction of W led to reduction of the specific surface area of catalyst. Under the conditions of model oil sample 20mL, catalyst 0.04 g, H2O2 /S molar ratio of 8, acetonitrile/model oil volume ratio of 0.3:1, at 65 ℃, react for 60 min, the desulfurization ratio of BT reach to 99.6%.
    Numerical analysis on the characteristics of carbon deposition of catalytic partial oxidation of methane under gravity
    SUN Zhiwei,ZHANG Li,YAN Yunfei
    2012, 31(04):  839-843. 
    Abstract ( 2476 )  
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    In order to study the reaction characteristics of catalytic partial oxidation of methane in micro-chamber,the characteristics of carbon deposition via temperature and density of metal active sites at certain C/O were investigated. The results show:at certain wall temperature and C/O,methane conversion rate and mass fraction of outlet hydrogen reach their maximum values,which are 99.10% and 12.39% respectively when density of metal active sites is 1.66 mmol/m2. The existence of gravity makes the carbon deposition increase on wall along the gravity and decrease on the wall at the opposite direction. The carbon deposition declines with the density increasing of metal active sites when the wall temperature is below 1500K;the carbon deposition is close to zero when the wall temperature is 1500 K.
      Progress in the organic modification of montmorillonite
    XIE Youli,ZHANG Meng,ZHOU Yonghong
    2012, 31(04):  844-851. 
    Abstract ( 2826 )  
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      Montmorillonites(MMT)have attracted considerable attention in fundamental research and applications. Organic montmorillonites / polymer nanocomposites exhibit superior characteristics in comparison with pure polymer constituents due to its unique one-dimensional layered structure. The types of organic modifier and research advances in organic modification montmorillonite were summarized. Also unique properties of organically modified montmorillonite/polymer nanocomposites were introduced,and the developing trend of the organic modifier were predicted. In order to broaden the application of montmorillonite,different types of organic modifier were developed for polymer/montmorillonite nanocomposites in order to improve the properties,improved heat and flame resistance and so on. including mechanical strength
    PAN-based Activated Carbon Fibers for CO2 Capture
    WANG Ying,ZHANG Xuejun,MA Xiaofeng,TIAN Yanhong
    2012, 31(04):  852-856. 
    Abstract ( 2734 )  
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    Activated carbon fibers were prepared from PAN-based carbon fiber with KOH activation. The CO2 adsorption and iodine adsorption of ACF samples were measured, and the Surface area, pore structure and surface functional groups are characterized by N2 adsorption and FTIR. It is studied that the activation temperature, activation time and surface modification of activated carbon fiber affected on the CO2 adsorption of ACF. The results showed that the activation temperature of ACF is the major factor for CO2 adsorption. When the activation temperature is 850 ℃, the BET surface area of ACF is 1235 m2 / g, and micropore surface area is 745 m2 / g. The CO2 adsorption capacity of this sample is up to 87.29mL/g, at the adsorption temperature of 273K and relative pressure P / P0 = 1.
      Synthesis of water-solubility carbon nanotube graftmodified epoxy resin
    SHEN Youbin,LIU Xiaoguo
    2012, 31(04):  857-860. 
    Abstract ( 2700 )  
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      The multi-walled carbon nanotubes(MWNTs)was treated by acid oxidation,and then processed by acyl chlorination. The carbonyl chlorides groups reaction with epoxy acrylic acid resin was applied to get carbon nanotubes grafted epoxy resin,and then free radical polymerization is conducted with acrylic acid. Consequently,the waterborne epoxy acrylate resin grafted with carbon nanotubes is obtained. The resin as main film-former is used to prepare waterborne carbon nanotubes grafted epoxy acrylic resin coating. The structure of the resin is analyzed by IR. Results show that carbon nanotubes can be grafted with epoxy resin by introducing carbonyl chlorides groups.
    Preparation and micelle formation of quaternary ammonium- N-(4-methyl-imidazole) chitosan
    CHENG Mengmeng,XIN Meihua,LI Mingchun,LI Xuan
    2012, 31(04):  861-865. 
    Abstract ( 2614 )  
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    In this work,quaternary ammonium-N-(4-methyl-imidazole)Chitosan(TM-MI-CS)was prepared with chitosan,1H-imidazole-4-carbaldehyde and iodomethane,and characterized by 1H NMR,FTIR,EA,etc. The micelles of TM-MI-CS made at different pH were also studied. The results showed that TM-MI-CS could form stable spherical micelles with the size between 188 nm to 607 nm at different pH,and the size of micelles was sensitive to pH changes. The critical micelle concentration(CMC)of TM-MI-CS in water was 0.714 mg/mL.
      Advance in production process and key manufacture technology
    for methionine
    GAO Wenliang,LI Linfeng,ZHANG Jingjing,LI Xueming,ZHENG Daomin
    2012, 31(04):  866-872. 
    Abstract ( 3721 )  
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    Methionine has been used in many industrial fields,such as organism,medication,feedstuff and foodstuff,and shows a promising market demanding and a potential application prospect. This paper briefly reviews its domestic and foreign advance in production process,including enzymatic decomposition,microbial fermentation,and chemical synthesis. Chemical synthesis,including amino lactone method,malonic ester method,catalytic alkylation by solid-liquid phase transfer and hydantoin method,is emphasized,the key manufacture technique for hydantoin hydrolysis and methionine crystallization is especially intensively described. In the end,the development direction and application perspective in the domestic market are also prospected,which suggest that modern enterprise for methionine production should be built up as soon as possible using petrochemical byproducts.
      Optimization of fermentation medium of daptomycin by
    response surface methodology
    HE Meiru,JIN Zhihua,HU Sheng,ZHANG Lijing
    2012, 31(04):  873-877. 
    Abstract ( 2917 )  
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      The fermentation medium of daptomycin,produced by Streptomyces roseosporus,was optimized by response surface methodology. It was found that initial pH,glucose,L-Asp and K2SO4 affected the daptomycin production significantly in Plackett–Burman experiment,but the affection of initial pH was predominant (p<0.01). The initial pH was optimized by one-factor-at-a-time experiment and the optimal pH obtained was 8.6. Then through the steepest ascent method and central composite design(CCD),the optimal fementation medium obtained were:13.0 g/L glucose,2.6 g/L L-Asp and 4.1 g/L K2SO4,and the daptomycin production reached 373.98 mg/L,which was in agreement with predicted value(365.76 mg/L)and 2.25 folds higher than that under the initial culture conditions.
    Optimization of the preparation of cyclosporine SLN
    YAN Yi,XUE Weiming,REN Hanyu,Lü Qing,FU Yunlu,LIN Yu
    2012, 31(04):  878-883. 
    Abstract ( 2219 )  
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      To investigate the preparation of cyclosporine A-loaded SLN with good monodispersity,regular shape and higher entrapment efficiency. Cyclosporine A-loaded SLN was prepared by solvent diffusion method. The shape and monodispersity of Cyclosporine A-loaded SLN was improved by adding some sodium alginate in the aqueous phase. Due to the formation of calcium alginate gel by adding Ca2+ into solution containing sodium alginate,cyclosporine A-loaded SLN could be separated at low speed of centrifugation and the entrapment efficiency could be determined easily and exactly. Based on single factor experiments,optimal conditions were gained by response surface design. Water content and aqueous temperature were significant factors for encapsulation efficiency. With the optimal condition,i.e. 0.1132 g sodium alginate,52.77mL water content and 34.55 ℃ aqueous temperature,cyclosporine A-loaded SLN was prepared with rod-like shape and satisfied monodisperse. The average size was 181.3nm and the average entrapment efficiency was 82.45%.
    Synthesis of N-(5-amino-2,4-diethoxyphenyl)benzamide
    ZHAO Deming,SONG Jiabin,WU Chunxin,ZHU Sanqi,JIN Ningren
    2012, 31(04):  884-888. 
    Abstract ( 2531 )  
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    Through acylation and reduction reaction,N-(5-amino-2,4-diethoxyphenyl) benzamide(DEBAB)was synthesized from 2,4-diethoxy-5-nitroaniline(DEANB)and the experimental conditions,such as materials ratio,reaction temperature and reaction time,were investigated. Proper experimental conditions for acylation reaction were found as:n(DEANB)∶n(benzoyl chloride)= 1∶1.25,H2O and CH3OH as solvent,K2CO3 as deacid reagent reaction temperature 0 ℃,reaction time 1 h,the yield of N-(2,4-diethoxy-5-nitrophenyl) benzamide(DEBNB)was 90.95% based on DEANB and the purity was 98.35% as determined by HPLC;proper reduction reaction conditions were found as:n(DEBNB)∶n(Fe)= 1∶4,H2O and C2H5OH as solvent,reaction temperature 80 ℃,reaction time 5 h,pressure of hydrogen 1.5 MPa,the yield of DEDAB was 89.93% based on DEDNB and the purity was 98.96% as determined by HPLC. The molecular structures of product and its intermediates were identified by 1H-NMR,MS and FT-IR.
    Synthesis and properties of a new modified phospholipids
    YANG Yang,WEI Yan’an
    2012, 31(04):  889-892. 
    Abstract ( 2114 )  
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    To synthesize gemini macromolecule modified phospholipids,oleoyl chloride was chosen as acylating agent,polyethylene glycol-800 as hydroxylation agent. The optimal condition for synthesis was determined by single-factor test and orthogonal-factor test. The main step’s optimal condition was at 339 K,6 h,the mass ratio of glacial acetic acid∶ion exchange resin∶hydrogen peroxide∶n-oleoyl phospholipid of 5.2∶8∶61.4. The results showed that the product's emulsified properties and dispersion were better than single modified phospholipids,and it turned out the product was macromolecule whose molecular weight is 2172, also it has better value of HLB(11.38).
    Synthesis and properties of di-hydrophilic betaine with amide group
    DU Guangjin,LIU Xuemin,LI Danping,YANG Qianqian
    2012, 31(04):  893-895. 
    Abstract ( 2496 )  
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    A novel di-hydrophilic beatine,N,N-bis[3-(dimethylcarboxymethylammonio)-propyl] lauramide was synthesized using lauroyl chloride,
    tetramethyldipropylenetriamine and sodium chloroacetate as starting materials.The structure of this betaine surfactant was confirmed by FT-IR and ESI-MS spectrum,and surface chemical properties of the product were measured.The lowest surface tension is 36.04 mN/m,critical micelle concentration is 1.07×10-3 mol/L at 25 ℃.The foaming and emulsification properties and lime soap dispersing power of the surfactant were also studied.
      Synthesis of N-propylaniline with the caprolactam ionic
    liquids as catalysts
    TAN Weiyi,ZHANG Zhihui,CHEN Qun,HE Mingyang
    2012, 31(04):  896-900. 
    Abstract ( 2835 )  
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      The reaction of aniline with bromine propane in the presence of caprolactam Brønsted acidic ionic liquids as catalysts was carried out,showing a high selectivity of N-propylaniline. The effects of the molar ratio of aniline and bromine propane,the dosages of HCl acceptor,reaction temperature,reaction time,the dosages and types of catalysts on the yield were investigated. The optimum conditions were as follows:n(aniline)∶n(bromine propane)∶n(catalyst)∶n(triethylamine)=1.0∶1.0∶0.05∶2.0,reaction temperature 60 ℃,reaction time 1.0 h. Under such reaction conditions,the conversion of aniline was over 92.40%,and the selectivity of N-propylaniline achieved up to 93.40%.
      Synthesis and catalysis performance in esterification of novel hexamethyleneiminium-based ionic liquid
    LI Gong,XU Heng,LIU Weiqiao,WU Feike,TONG Huijuan
    2012, 31(04):  901-906. 
    Abstract ( 2555 )  
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      Two novel Brønsted acidic ionic liquid,1-(3-sulfopropyl)hexamethyleneiminium hydrogen sulfate([HMIPS]HSO4)and 1-(3-sulfopropyl)hexamethyleneiminium tosilate([HMIPS]OTs)were prepared using hexamethyleneimine and,etc,FT-IR,LC-ESI-MS and DSC-TG. The results proved that the ionic liquids synthesized contain a hexamethyleneimine with seven member ring and possess stronger Brønsted acidity,decomposition temperayure are over 260 ℃ and the acidity of aqueous solution of [HMIPS]HSO4 is similar to that of aqueous solution with the same concentration of sulfuric acid. Their catalytic activities for the esterification of citric acid with n-butanol were examined and compared with the imidazolium-based ionic liquids. The results showed that[HMIPS]HSO4 exhibits excellent catalytic activity,the conversion of citric acid was 98.3% and the yield of tributyl citrate reached 97.5% under the conditions of n(citric acid)∶n(n-butyl alcohol)∶n([HMIPS]HSO4)=5∶1∶0.02,110—130 ℃ and reflux 2 h. Furthermore,The activity of [HMIPS]HSO4 catalyst reused at least 10 times was not significantly decreased.. They were characterized by 1H NMR 1,3-propane sultones
      Advances in biochar production from wastes and its applications
    WANG Huaichen,FENG Leiyu,CHEN Yinguang
    2012, 31(04):  907-914. 
    Abstract ( 4308 )  
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    Biochar,a kind of multifunctional materials,has drawn much attention in recent years. In this paper,the main organic waste as feedstock and the main process for biochar production were reviewed. The physicochemical properties of biochar such as the element content,alkalinity,surface characterization and the microscopic pore structure were introduced. Also,the potential application of biochar in the field of agriculture and environment was summarized,such as the utilization of soil conditioner for improving fertility,enhancing carbon fixation and reducing greenhouse gas emission,and as an effective adsorbent for removing heavy metals and organic pollutants from wastewater. Finally,the future research direction of biochar was forecasted,which indicated that more studies should be focused on large-scale,efficient and low-cost production of biochar as soon as possible. Also,the specific surface area of biochar as the alternative of activated carbon should be enhanced in the field of material and process. Moreover,further investigation on the mechanism of improvement and restoration of soil,the promotion of growth and production of crops as well as the greenhouse gas reduction by the biochar is highly desirable,so as to provide the data support from the large amount and long-term experiments.
    Adsorption removal and recovery of heavy metal pollutants by agricultural and forestry wastes
    LI Xiaosen,LU Diannan,LIU Zheng
    2012, 31(04):  915-919. 
    Abstract ( 2547 )  
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    Agricultural and forestry wastes have the adsorption capacity of heavy metal ions,which can be used as biological adsorption applied in the industrial wastewater treatment and recovery of valuable heavy metals. This review focused on the recent advancement in the adsorption mechanism,adsorbent innovation and the downstream processing of the metal concentrates. The problems in research and development of agricultural and forestry wastes based adsorbent were also discussed. This review revealed the microscopic process of adsorption,clarified the role of the structure and composition related to the adsorption in the cell wall and determined the mechanism of adsorption of the heavy metal. The article pointed out that the development of new efficient biological adsorbents which perform high selectivity and adsorption capacity is the key step for application. After the adsorption of heavy metals,further processing is necessary for industrialization.
      Recent developments in treatment technology for highly
    saline organic wastewater
    2012, 31(04):  920-926. 
    Abstract ( 2806 )  
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      With the development of industry,the increasing discharge of highly saline organic wastewater plays adverse impacts on the environment. In this paper,the application of conventional physico-chemical methods,especially membrane separation technology,for the treatment of highly saline organic wastewater is summarized. The biological methods,including aerobic,anaerobic and aerobic/anaerobic hybrid technologies are also widely used in disposing of highly saline organic wastewater,and the performance of which depends on the cultivation and domestication of halophilic microorganisms. The synthesis of high-efficiency oxidants,preparation of membranes with better cost performance,rapid acclimatization of halophilic bacteria and development of new reactor would be hot points in treatment of highly saline organic wastewater;and the combined technology of physico-chemical methods and biological methods would be the future research orientation for treatment of highly saline organic wastewater.
      Inorganic chlorine released from typical components of medical waste in pyrolysis/incineration
    LIANG Juanjuan,LI Xiaodong,YAN Mi,LU Shenyong,YAN Jianhua
    2012, 31(04):  927-932. 
    Abstract ( 2508 )  
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      In order to investigate inorganic chlorine released from the process of medical waste pyrolysis/incineration,a series experiments with different pyrolysis temperature,combustion temperature and gas flow rate were conducted;the effect of other compositions on inorganic chlorine emission from medical tube(PVC)incineration was also studied. Total conversion rate of inorganic chlorine just slightly changes under diferent conditions,but the variation in conversion rate of Cl2 and HCl are comparatively remarkable. Compared to the single PVC incineration,the addition of fiber can obviously promote Cl2 formation,and slightly prevent HCl release. HCl emission is significantly reduced by the presence of rubber,the conversion rate of HCl decreased.
      Differential thermal analysis during the thermal decomposition of three typical medical wastes
    MA Hongting,WANG Fangchao,YANG Guoli,HAO Sufeng,WANG Minghui
    2012, 31(04):  933-937. 
    Abstract ( 2378 )  
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      The thermal decomposition and differential thermal analysis process of three typical medical wastes(infusion bag,toilet paper,injector)were experimentally investigated by using the TG-DTA apparatus,the samples were heated at 20℃/min in 20 mL/min nitrogen flow. The results show that the thermal decomposition of medical waste is a heat-absorption process. The curve shape is complex,and non-symmetric. There is a significant deviation in base line. The temperature for the maximum weight loss rate is lower than that for the instantaneous thermal balance.
    Adsorption of chlorpheniramine from water by rectorite
    WANG Xiaoyu1,Lü Guocheng1,WANG Qianqian2,ZHU Zhongjun3,LI Zhaohui1,4,
    2012, 31(04):  938-942. 
    Abstract ( 1712 )  
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    This paper investigated the removal efficiency of rectorite on chlorpheniramine(CPM). Adsorption of CPM by rectorite was discussed under different time,concentration and pH conditions. Experimental results showed that the removal efficiency on CPM increased quickly first then slowed down with time;and the adsorption equilibrium reached in 22 hrs. Based on the Langmuir model analysis,the maximum adsorption capacity of rectorite on CPM is 121.76 mg/g at room temperature. Besides,the adsorption kinetics could be better described by the pseudo-second-order-model,and the optimal adsorption occurred in alkaline condition.
      Research on the method and equipments for the separation of slag in lime-milk preparation process
    Lü Wenjie,YANG Qiang,WANG Hualin,SHEN Qisong,ZUO Peng
    2012, 31(04):  943-947. 
    Abstract ( 3396 )  
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      In order to avoid the harm of the undissolved impurities to the entire system in the process of the lime-milk’s preparation,the preparation technology of lime-milk and the separation equipment of slag are analyzed. It indicates that hydrocyclone is more applicable in the separation of slag. Hydrocyclone scummer device was found in 8000 t/a epoxy propane unit of Baling Petrochemical Company. The average separation efficiency of hydrocyclone scummer device was above 80%,the average removal rate of slag reached 81.35%,and the cleaning period of saponificationcolumn was prolonged to 40—50 days. It has realized the long period stable operation for the whole device,and reduced the damage rate and the environmental pollution.
      Effect of TiO2 properties of the manufacture of SCR deNOxcatalyst
    LI Yuntao,DU Yungui,HUANG Rui
    2012, 31(04):  948-951. 
    Abstract ( 3318 )  
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      Aiming at the fabrication process of widely used honeycomb SCR catalyst,the properties of TiO2 has been analyzed,including particle size,size distribution,shape,degree of agglomeration,chemical composition and purity,and their influence on manufacture procedure of mixing,extrusion,drying and calcinations. The fine fabrication of SCR catalyst is facilitated by the narrow or monodisperse size distribution of TiO2,spherical or equiaxial shape TiO2 particles,low agglomeration degree of TiO2 particles at the required pH in mixing procedure. High standard is also required on the chemical composition and purity of TiO2.
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