The research progress of two kinds of thermal stabilizers, hydrogen donors and coke inhibitors that retard coke formation in pyrolysis of jet fuel at a temperature above 400℃ is summarized. The mechanism of coke formation is discussed and the effects and mechanism of coke inhibition by mono-, binary hydrogen donors as well as phosphorous inhibitors, organo selenium compounds and sulphurous inhibitors are reviewed. The research direction in the future is proposed.

Development and application of cationic organic flocculants are introduced in this paper. Modified cationic polyacrylamide flocculants, dicyandiamide-formaldehyde flocculants and modified cationic high polymer flocculants from natural high polymer are reviewed. The prospect of application of cationic organic flocculants in China is discussed.

The recent progress of co-doping of titanium dioxide photocatalyst with metal, rare earth and non-metal is introduced. Co-doping of titanium dioxide, when two appropriate elements are chosen and the doping concentrations and co-doping proportions are optimal, could further enhance the photocatalytic activity because the two doping elements play separate roles. Finally, the future development in this field is also presented.

Pervaporation separation of ester/water mixture is introduced. The kinetic model of pervaporation-esterification coupled membrane process, membrane materials, membrane modules and industrial application are discussed. The development of new membrane materials and the design of new membrane module will be the key research in the future.

The recent development of synthesis of carbamate by using CO2 as an activator is summarized. The merits and the shortages of the synthesis progress under the conditions of metal salt catalysts, carbamate anions, ionic liquid by electrochemical production and supercritical CO2 are introduced, and the reaction mechanism are also discussed. Further studies about synthesizing carbamate by using the non-phosgene method are also discussed.

The biocompatible and biodegradable poly(β-hydroxybutyrate) can be used as medical material，wrapper and optics datum to partly replace current plastics. However，the high crystallization and inferior process restrict the application of poly(β-hydroxybutyrate). The advances on modification of poly(β-hydroxybutyrate)(PHB) is reviewed. The modification methods and performance of PHB copolymer are summarized. Reactive polymer blending is a useful method to improve the miscibility of PHB blends，and the modification based on PHB macromer reaction，reactive polymer blending and interpenetrating network technology represents the new trends of PHB modification.
chemical modification

The recent development of preparing optically active 4-chloro-3-hydroxbutanoate ester (CHBE) by biocatalysis is reviewed. The current research of racemic resolution and asymmetric reduction to prepare the optically active CHBE by biocatalysis is introduced. Several measures for controlling the stereo-selectivity of the asymmetric reduction of 4-chloro-3-oxobutanoate ester (COBE) to CHBE such as screening solvent, selection of co-substrate and additive, heat treatment of cells and so on, are presented. The prospect of industrial preparation of the optically active CHBE by biocatalysis is also discussed. biocatalysis; optical activity；4–chloro–3–hydroxbutanoate esters；racemic resolution；asymmetric reduction

Phytic acid is a kind of important natural organic phosphorus additive with wide application. Its properties, form of occurrence, preparation, product specification, analysis method and its application in food, pharmaceutical and other industrial fields are reviewed. Suggestions on its technological development, manufacture and practical application are presented.

Taurine is noted for its physiological and pharmacological actions；however the reports about taurine as a kind of ligand with cation forming complexes are scarce. Some synthetic routes of the metal–taurine complexes and the taurine Schiff base complexes are discussed in terms of coordination chemistry. The applications of the complexes are briefly reviewed.

The recent research on ultrasound application to adsorption/desorption process is presented. The adsorption isotherms at the absence and presence of ultrasound are compared. Several factors, which affect adsorption and desorption phase equilibrium, are analyzed, including ultrasonic intensity, frequency and the addition of a third components. The adsorption/desorption kinetics at the absence and presence of ultrasound is also compared. Several factors, which affect adsorption/desorption rate, and the causes are analyzed, including ultrasonic power, temperature, original concentration and adsorbent size.

The advances in hydrothermal synthesis, characterization of heteroatom-containing molecular sieves and mechanisms of template are summarized. The applications of heteroatom-containing molecular sieves to hydroxylation, alkylation, epoxidation, cracking reaction, etc. for their good catalytic performance and selective oxidation properties are introduced in detail. The present situation of the application of the heteroatom-containing molecular sieves in chemical industry is reviewed, and the problems in their synthesis and application are analyzed.

To find a perfect scaffold material is one of the popular studies on bone tissue engineering．Hydroxyapatite and its composites are an ideal substitute material of bone tissue engineering due to their biocompatibility and mechanical properties. Hydroxyapatite and its composite are reviewed in terms of preparation and characteristics

The anode catalyst of direct methanol fuel cells (DMFC) is one of the key materials for the DMFC. The electrochemical activity of the catalysts will affect the performance of the fuel cell and its cost. The activity of the catalysts depends on the preparation techniques of the catalysts. This article deals with the techniques for preparing the anode catalysts. It could be a reference for the preparation of anode catalysts used in the DMFC.

The recovery and utilization of waste rubber is discussed in this paper. The cryogenic comminution technology has the advantages of less pollution, low power consumption, etc. and is widely used. The restraints of high energy consumption and large exergy consumption of the actual cryogenic comminution technology and the corresponding solutions are presented. In China the technology of LNG cryogenic energy utilization can be used for rubber comminution. It not only decreases the production cost of rubber comminuting but also makes full and effective use of LNG resources .

Determination of perfluoroisobutylene (PFIB) in fluorine chemicals production is reviewed. The difficulties of determination of PFIB are analyzed. Also，the preparation of PFIB standard，chromatography column (packed column and capillary column)，detector are reviewed. PFIB gas chromatography operational condition is given for reference. Finally，requirement for determination of PFIB at different concentrations and the probable trend of PFIB determination are presented.

The development of electronics depends on the advance of cooling methods. The present situation and trend of heat dissipation of electronic devices are described. At the same time，several advanced cooling techniques，such as improved heat sink cooling，direct immersion cooling，cold plate cooling，heat pipe cooling and thermoelectric cooling are introduced.

The solvent effect on epoxidation of allyl chloride with hydrogen peroxide catalyzed by titanium slicalite-1(TS-1) in solvents with different kinds of functional group was studied. The results indicated that the performance of allyl chloride epoxidation was improved in the solvents with hydroxyl group and in acetone, but became worse in the solvents with nitrile group. The results are affected by the steric hindrance of solvent molecules in the channels of TS-1, and ethanol, isopropanol and t-butyl alcohol can be oxidized by H2O2 into aldehyde, ketone or peroxide respectively. The selectivity of TS-1 can be improved, but not as well as its stability when acetonitrile is added into methanol or acetone.

A novel iron complex bearing single imino-pyridyl ligand was prepared. Ethylene oligomerization was carried out by using the complex as pre-catalyst and methyl aluminoxane (MAO) as co-catalyst. The effects of reaction temperature, pressure, n(Al)/n(Fe) molar ratio, iron complex concentration and reaction time on catalytic activity and product distribution were investigated. The results showed that the novel iron complex/MAO used in ethylene oligomerization had high catalytic activity and high selectivity toward low carbon linear α–olefin.

The acetalization and ketalization of various aldehydes and ketones with glycols using FeCl₃ as catalyst were studied. The effects of reaction time, mole ratio of reactants and amount of catalyst on the yield of acetals (ketals) were investigated. The results showed that FeCl₃ was an efficient catalyst for the acetalization and ketalization with high conversion and selectivity in mild conditions. The best reaction conditions were: molar ratio of aldehydes and ketones to glycol 1∶1.2，catalyst amount 2 g/mol aldehydes or ketones, reaction time 2 h. The conversion was over 95% and selectivity was over 97%.

Catalytic wet oxidation of H2S to sulfur on Fe/Cu catalyst in plate column was investigated，and the effects of superficial velocity，liquid-gas ratio，initial pH value of absorbent and the inlet concentration of H2S on H2S removal efficiency were studied，and the dependency of the oxidation rate of ferrous ion on the air flux and height of ferrous solution column was also investigated. The results showed that the removal efficiency of H2S could almost reach 100% for 1000×10－6 (V/V) H2S under the conditions that the concentrations of Fe2＋，Fe3＋and Cu2＋ were 70 g•L－1，70 g•L－1 and 120 g•L－1 respectively. In general，the possible advantages of this process are low energy demand for operation and reduced consumption of chemicals (no other raw material will be consumed except O2 in flue gas)，and the process has no secondary pollution and no problem of reaction system degradation.

In this paper, the dehydration behavior of copolymer hydrogel membrane of KH570 with N-vinylpyrrolidone（NVP） and hydroxyethylmethacrylate（HEMA）was studied. The results showed that the dehydration mechanism could be described by two models, one was the order of kinetics being 1 and the other was the order of kinetics being 0.5. For the order of kinetics 1, it was the initial dehydration and was characterized by the evaporation of water; while for the subsequent order of kinetics 0.5, it was characterized by the diffusion of water. The dehydration rate of the hydrogel membrane increased when the temperature and the content of NVP or KH570 increased, while the dehydration rate decreased when the content of NaCl increased.

A series of adhesives were prepared from chlorinated polypropylene (CPP)，vinyl triethoxy silane (VTES) and styrene (St) by solution polymerization，using benezoperoxide (BPO) as initiator and xylene as solvent. The influence factors，such as solution quantity，initiator concentration，monomers quantity and ratio，reaction temperature and reaction time were investigated. The optimum reaction conditions were determined，i.e.，mass ratio of solvent and CPP m(xylene)∶m(CPP)=2.5∶1，material mass ratio of polymerization system m(CPP)∶m (VTES)∶m (St)∶m (BPO) =100∶2.4∶0.6∶0.2，reaction temperature 95℃ and reaction time 3h. Under these conditions the adhesive showed good adhesive property and the shear strengths of felted polypropylene and adhered steel materialreached 3.4MPa and 7.7Mpa respectively.

Super water absorbent resins P(NaAA)，SA/NaAA，SA/NaAA/PVA and SA/NaAA/AM were synthesized from sodium alginate（SA），acrylic acid（AA），polyvinyl alcohol(PVA)and acrylamide(AM)，with N，N–methylenebisacrylamide as crosslinking agent，(NH4)2S2O8 - NaHSO3 as initiator，by means of aqueous solution polymerization. The degradation behavior of these resins were studied by the microbe method . The results indicated that both weight and mechanical property of resins decreased by environmental complex fungouds，the weight losses of sheets of gels in 60d were 9.41%、20.65% and 18.60%，the deformation ratios of sheets of gels were 23.5%，25.1% and 26.4% respectively. Mono-germ and mono-fungus tests showed obvious growth of fungoids on the surface of SA/NaAA/AM and SA/NaAA/PVA gels，and slight growth on the surface of SA/NaAA gel.

The SEM and AFM experiments showed that O, O-dilauroyl chitosan could form a new kind of self-assembled vesicles for drug delivery and the diameter of the vesicles was mainly 100-200nm. The effects of degree of acylation of chitosan and addition of lecithin on the behavior of O, O-dilauroyl chitosan self-assembled vesicles were studied in this work. The experimental results showed that the rate of drug-release of the vesicles decreased with increasing degree of acylation, and the rate could be increased with the addition of lecithin. The degree of acylation of chitosan had hardly any effect on the drug loading capacity of O, O-dilauroyl chitosan self-assembled vesicles, but obviously affected the drug encapsulation efficiency. The drug encapsulation efficiencies of three kinds of the vesicles made from different acylated chitosans were 29.52%, 31.55% and39.88% for degree of acylation 1.3, 1.4 and 1.7 respectively.

Based on the real data from the purifed-terephthalic acid (PTA) manufacturing process，an artificial neural network model was developed for predicting the flow rate of off-gas oxygen and carbon dioxide in the para-xylene oxidation process. The operation condition of para-xylene oxidation was optimized by sequential quadratic programming. The commercial production showed that it could not only satisfy the requirement for PTA purity，but also reduce consumption of para-xylene and acetic acid combustion.

This paper presents a novel production process of alumina by using isooctanol. The reaction rate of isooctanol and aluminum is very fast. It is simple to purify triisooctanoxyl aluminum，to reuse isooctanol and to control the physical and chemical properties of alumina. This production process can be easily commerialized. The catalyst using alumina obtained by this method has the performance as good as that of the catalyst using imported SB alumina.

The raffinate column in the eluxyl unit of an aromatics complex is the key fractionator to separate C8 aromatics from para-diethyl benzene (PDEB). PDEB is expensive and only if the PDEB content in C8 aromatics side cut is less than 25×10-6 mol/mol, the operation cost could be lowered effectively. The article describes the problems before revamping, the design philosophy and solution for the application of minitype high efficiency valve tray, the performance test results after revamping, and the comparison of operation data before and after revamping in a domestic aromatics complex. After one year and a half commercial operation, the operation is stable and the load is over 100%. The PDEB content in C8A side cut is less than 10×10-6 mol/mol or even less, and the product purity and recovery can be kept high, which all indicate that the revamping of the raffinate column can meet the requirement of actual production.