The recent advances in using of N2O as oxidative dehydrogenating agent were reviewed. The new investigation of N2O used in oxidative dehydrogenation of n-butane，propane and benzene was summarized. The discussion was focused on the oxidative dehydrogenation of ethylbenzene to styrene in the presence of N2O and the role of N2O in the oxidative dehydrogenation reactions. Finally，research trend of renovating catalysts，developing new catalyst materials and studying the mechanism of oxidative dehydrogenation of ethylbenzene to styrene in the presence of N2O was discussed.

Hyaluronan (HA) has wonderful biocompatibility and biodegradability，but needs cross- linking modification to improve its mechanical properties for its use as a biomaterial. This review concentrates on the recent advances of cross-linking reagent for producing HA derivatives，and introduces the application and development of common cross-linking reagent and new type cross-linking reagent，so as to provide more advice for the development of HA reagent.

A novel method for the preparation of NaY molecular sieve by using a Si-Al gel with special composition as the directing agent was presented. The as-synthesized NaY molecular sieve was characterized with SEM, XRD and BET. The NaY molecular sieve had a particle size of approximately 2μm, n(SiO2)/n(Al2O3) of 3.28, crystallinity of 90% and specific surface area of 703 m2/g. Except the crystallization process, the synthesis of the NaY molecular sieve was conducted at room temperature under mild and controllable reaction conditions.

The solid superacid SO42-/ZrO2 supported on mesoporous MCM-48 was prepared by the liquid-phase precipitation，and the process for the formation of superacid on the catalyst surface and mechanism of regioselective nitration by catalysis were presented. The regioselective nitration of o-xylene with nitric acid was selected as a probe reaction to test the catalytic performance. The structure of the solid superacid was characterized with acid base titration，TEM，N2 adsorption/desorption and Hammett indicator. The results showed that the mesoporous structure of MCM-48 was maintained in the catalyst system，and there were Brønsted acid and Lewis acid sites on catalyst surface with a high BET surface area of 208 m2/g and better solid acidity (H0＜－13.75). The optimum conditions were as follows：calcination temperature of catalyst was 500 ℃，the reaction was carried out at 60 ℃ for 3 h with n(nitric acid)/n(o-xylene) 2.5 and m(o-xylene)/m(catalyst) 25 to get the yield of 91.8%，the content of product up to 82.1%.

β-glucanase produced by immobilized Escherichia coli JM 109-pLF3 in a packed bed bioreactor was studied. In batch fermentation，the highest enzyme activity of 100.3 U/mL was achieved at a recycling rate of 44.49 mL/min and an aeration rate of 0.6 mL/min after 48 h cultivation. In repeated batch operation，the enzyme activity up to 100 U/mL was obtained in 5 cycles，showing high stability of the immobilized cells. In continuous fermentation，the production of β-glucanase by immobilized cells was kept more or less constant. When the dilution rate was 0.05 h-1，the enzyme activity in the fermentation broth was 39.1 U/mL.

Taking pure anatase TiO2 as the precursor, doped magnetic ions doped with titanate nanotubes were synthesized by the hydrothermal method. In this process the nanotubes were prepared at the same time with the doping of magnetic ions. The products were characterized with X-ray diffraction (XRD), Transmission Electron Microscope (TEM), Thermal Analysis (TG-DTA) and BET surface area. The results showed that the structure of the nanotube was that of titanate different from anatase phase. The nanotubes had very large surface area and pore volume. The doping of magnetic ions did not make an obvious effect on the morphology and structures of titanate nanotubes. Treatment at a high temperature would bring big changes to the structures of titanate nanotubes. When the calcination temperature was higher than 450℃, the tubulous structure of titanate nanotubes was destroyed and transformed into anatase phase.

Water flooding and process scheme in Cainan oil field, Zhunggar basin，Xinjiang were introduced. Based on the quality of produced water and the technical standards of re-injected water, the bacteria, oil content, suspension, sulfide, corrosion rate of produced water were investigated. The treatment reagents were tested and screened in the laboratory and the reagents of Sanda Company PAC, JM-300, the reagents of Keli company KL-0308, KL-0305 were used in field application. After treatment the produced water quality met the standards for re-injection.

Intelligent techniques，such as artificial neural network，fuzzy inference logic and expert system，are used in several applications. These techniques are based on human intelligence and way of thinking. They do not need much system information. New ideas and methods are presented for resolving the key problems of complex control system. The intelligent techniques were used in ethylene plant. The intelligent system structure and application were demonstrated in thermal cracker，and the application results in the process were shown. The successful application illustrates that the intelligent techniques are very attractive in process control.

Based on process mechanism analysis, this paper presents an application of advanced process control strategy to resolve the practical issues of ethylene glycol distillation system. The inferential control, decouple control, and expert control technologies are applied and integrated with distributed control system seamlessly. And operation conditions are optimized based on exact industrial process models for ethylene glycol distillation system. As a result of these work, control stability is improved obviously, energy consumption decreases effectively, and operation period is prolonged.

Water Cascade Analysis (WCA) technology was used to synthesize the water use network for batch processes，which could determine the water pinch point location and the minimum utilities target of the batch process：minimum fresh water use and wastewater discharge. Based on pinch analysis，WCA used water cascade table (WCT) to avoid the tedious drawing work of graphical methods and the solving difficulty of mathematical methods，and it could handle water-using processes with and without mass-transfer，so it was applicable to a wide range of water-using operations. The batch processes referred to in this work could be defined as the processes which operated discontinuously and every one of water-using operations had its own start and stop. So，batch processes were divided into several intervals according to the starts and stops of water-using operations. The method firstly ignored time constraints to define the global pinch and utilities target of the batch process，then identified every local water pinch location and the minimum utilities of intervals for the batch process without and with storages respectively. Water-using bottleneck of the batch process was defined by comparison of the global and local pinch，then the storage location was determined to minimize the utilities targets for the batch process. An example was used to illustrate the method，and the results showed that WCA is an effective and efficient method for the synthesis of the water use network for batch processes.

Because of uncertainty factors in the burning process of solid waste，it is impossible to execute fault diagnosis by using first principle models. Principal Component Analysis (PCA) was introduced in this paper for incipient fault diagnosis of a waste solid incinerator (WSI). Based on historical data，a PCA model was built to represent its normal states. Fault detection was then realized based on two statistical variables T2 and SPE. Residual Subspace Contribution Factor graphs were then utilized to assist the fault diagnosis. The research result indicated that PCA was an effective approach to incipient fault detection and diagnosis of WSIs.

In this paper，the effects of operating conditions on the Fenton’s oxidation process of landfill leathate were investigated by using statistical methods. Response surface methodology (RSM) was used to investigate the effect of FeSO4•7H2O concentration，H2O2/FeSO4•7H2O and pH on COD removal. The high and low levels of pH values，K2S2O8 concentration and bias potential were 0.01 to 0.02 mol/L，1 to 5mg/L and 2 to 6 respectively. Using the software of Design-Expert 5，a response surface quadratic model in terms of actual factors was obtained based on the experimental data. The optimum FeSO4•7H2O concentration，H2O2/FeSO4•7H2O and pH were found to be 0.013mol/L，4.60，and 4.45 respectively and the highest COD removal efficiency (69.85%) could be achieved.

A mixed integer non-linear programming (MINLP) model solving a multi-objective optimization problem that minimized make span and impact of energy consumption was proposed for multi-product batch chemical process scheduling. In this model，the energy consumption factor and decision factor for various products were defined for trade-off between make span and energy consumption. An improved simulated annealing (SA) algorithm was used for solving the problem，and several cases for an example problem were studied. The proposed model could be used to show how the energy consumption consideration affects the scheduling of a multi-product batch process.