An equation or state for pure associating fluids is developed by treating dipole-dipole interactions separately with perturbation theory and mean spherical approximation(MSA）,and treating hydrogen bond association with statistical associating fluid theory (SAFT）.The saturated vapor pressuresand liquid densities of 37 associating fluids（ater,alkanols,acids and amines)are correlated with molecular（or segment)microscopic parameters.It is shown that the corrdelated results with perturbatin theory are superior to mean spherical approximation and are consistent with the molecular simulation data.

The thermodynamic swelling characteristics of chitosan membrane and H_2SO_4 crosslinking chitosan membrane in water-ethanol mixture were studied.Thermodynamic swelling distribution relationship showed there existed strong coupling effect in the themodynamic sewlling process.In order to analyze the coupling effect in the thremodynamic swelling process,the relationship between the activity and volume fraction of each component within the membrane was defined.And the concept of reference state in the thermodynamic swelling process which only considered the interaction between individual component and membrane matrix was also set up.The interaction between H_2O and the membrane matrix dominated the activity coefficient of H_2O within the membrane,But the activity coefficent of EtOH was dominated strongly by the coupling effect between H_2O and EtOH within the membrane because of existence of H_2O within th membrane

The dispersion of immiscible liquids is of great importance in many chemical engineering processes.In a turbulent dispersion,the breakup and coalescence of drops usually take place continuously.These rate processes determine the drop size distribution,which is an equilibrium property,and the interfactial area is availrable for mass transfer.The coalescence between drops in an isotropic turbulent dispersion is examined in this investigation.Whith this result,a new model without any adjustable or empirical parameters is developed to predict the minimum drop size free from coalescence both in surfactant systems and pure systems.The drop size distribution and coalescence efficiency are also discussed.

Based on the Turbulence Model Theory,a new model for prediction of buld average eddy diffusivity in bubble columns was developed.Comparison of the model results with experimental data available showed that the new relation gave a reliable estimate of the eddy diffusivity,while reported some relations overestimated the eddy diffusivity.Furthermore,the relationship between the turbulence closure procedure and the simplified circulation flow model adopted by many researchers was discussed to explain possible ressons for the above discrepancy.

The free segment probability of polymer solution was derived with Flory-Huggins model,Guggenheim model and Revised Freed model of Hu et.al.On this basis,the corresponding free segment proability of polymer at the adsorption layer of the solid/liquid interface was established by the method of amalogy.Combining with DiMarzio-Rubin’s matrix statistical method,the polymer adsorption models at the solid/liquid interface based on close packed latticed model were established.The polymer concentration profiles predicted by these models have been compared with the Monte Carlo computer simulation results.It was shown that the calculated results by adsorption model based on revised Freed model and the Guggenheim model were better than that by adsorption model based on the Flory-Huggins theory.

The adsorption models of polymer at the solid/liquid interfaces developed in the previous paper were used to calculate the microscopic structrues of the polymer adsorption layers including polymer concentration profile in the region of the interface,thickness of adsorption layer,adsorption amout,and distributions and average lengths of chain configurations of train,loop and tail configurations.The influence on adsoprtion behavior by bulk polymer concentration,interaction parameter between polymer and solvent,adsoprtion energy parameter and chain length was investigated.

Based on the statistical/kinetic method previously presented by the authors,a partition model of primary chains between sol and gel is developed.A model of average molecular weight of the sol is also proposed.From computer simulation,it is found that the chain length in the gel is much bigger than that in the sol and once passing gel point,the molecular weight decreases sharply,depending on reactivity ratio.The present model is successfully applied to predict the development of molecular the weight of sol in the vinyl chloride/diallyl phthalate suspension crosslinking copolymerization.

Based on the software used in the simulation calculation of unsteady state SO_2 converter，a comparison between two types of unsteady state converter,namely,heat removal and adiabatic converter is presented in this paper.The effects of parameters such as gas concentration，velocity，cycle duration and cooling capacity on unsteady state SO_2 converter are studied.For the gas of high concentration，two-point heat removal structure is recommended.With identical gas concentration,traveling wave velocity is directly proportional to gas velocity.For two-point heat removal converter,cooling capacity and cycle duration are two controllable variables in optimizing the reaction，whereas the inlet temperature of gas and preheated temperature of catalyst bed have relatively minor effect on unsteady state conversion.

For the two-point heat removal converter,the transfer function for converter regulation channel is determined.It is clear that the unsteady-state converter is a system of large time constant.Three converter controlling strategies for the treatment of tail gas of a factory are compared,from which the position control by valve is chosen owing to its easy operation and good control effect.

Based on the growth behavior of the immobilized R.oryzae in polyurethane foam cubes for lactic acid production,a double-layer reaction-diffusion model was proposed to describe the fermentation process.The model was numerically solved by the finite difference method.The theoretical prediction agreed well with the experimental results.This indicated that the model could be employed for the design and optimization of the fermentation process．

The techniques for separation of glutathione（GSH）by aqueous two-phase extraction combined with temperature-induced phase separation were studied.The partition behavior of GSH in ethylene oxide-propylene oxide random copolymer(EOPO）/hydroxypropyl starch（PES)／water systems was investigated．The effects of such factors,as concentration of polymer,pH,on the partition coefficients in two separation processes（aqueous two-phase extraction and temperature-induced phase separation)were studied.The optimum conditions were EOPO4000 13%,PES100 10％,pH=10.5. The separation technique for GSH from yeast cell was also investigated.A feasible separation scheme was suggested,and the results show that the total extraction yield could reach over 80％．

The VLE data for salt-containing binary systems of ethanol／NH_4NO_3 and water/NH_4NO_3 were determined,and were correlated in order to get optimal binary parameters in NRTL model.It is proposed that the titration analysis-gas chromatographic analysis combination method can be used to determine the components in liquid phase for multicomponent salt-containing systems.Salt-containing VLE data for the temary systems of methanol／water／NH_4NO_3, ethanol/water/NH_4NO_3,and for the quaternary system of methanol/ethanol/water／NH_4NO_3 were detenrmined.The optimal binary parameters were used to predict the VLE data for the above-mentioned multicomponent salt-containing systems by Salt-Containing Local Composition Model,and the experimental VLE data were compared with the predicted results.The results shows that the VLE data agreed well with predicted data,and the SaltContaining Local Composition Model was suitable for predicting the VLE of salt-containing quaternarysystems.

The vapor phase passing through the flowing liquid on a distillation tray exerts a resisting force on the liquid phase and,at the same time,enhances liquid turbulence.Both of these effects should be considered in the modeling of the Liquid velocity field.A mathematical model considering both effects isdeveloped.The comparison of the computed results with experiments shows that the proposed model is more suitable for simulating the velocity field on distillation trays than existing model.

Experiments of continuous liquid spraying in a Φ300 G-S fluidized bed were performed．Fluidizing quality and heat transfer characteristics in liquid spraying condition were studied using polyethylene particle and hexane as media.The influences of fluidizing velocity,distribution plate，liquid feed and method on heat transfer coefficient and liquid vaporization rate,the relation between heat transfer capacity and mass of spraying liquid were analyzed．The maximum vaporization speed of liquid in given condition was derived theoretically.

In this paper a technology of parametric pumping fractional crystallization and a crystallizer with a slug flow vertical bubble tube are presented. This technology and crystallizer are applied to the refining of naphthalene. The purity naphthalene obtained is over 99％ and collection efficiency is over 92.5％．

A non-linear and non-equilibrium model of cycling chromatography was established．Computer simulation and experiment of the process of cycling chromatography showed that the productionrate of cycling chromatography was higher than that of conventional chromatography method The production rate of the cycling chromatographic separation increased with the increase of the cycling number. The use of the cycling chromatography technique would improve apparently improve the production rate if the solid／liquid interface mass transfer resistance was large or the apparent selectivity coefficients of adsorbants were small.The elution curves calculated by the model of non-linear and nonequilibrium cycling chromatography, were in good agreement with experimental elution curves of chromatography while the elution curves calculated by the model of the equilibrium cycling chromatography deviated from the experimental elution curves of chromatography.

The separation experiments of CH_4 and H_2 was carried out in a thermal diffusion column with and without packing.In the case of no packing added,the separation was affected by heating temperature,β（cut),and residence time.The temperature gradient is the driving force of the thermal diffusion separation. The separation degree was increased with increasing of heating temperature,and it was affected by βsharply.Under the conditions of higher heating temperature,the optimum separation was obtained with the β value which was close to the mole fraction of hydrogen in the feed.The separation degree was also affected by the residence time.In the case of packing column,the separation degree was higher for the packing with larger size.However,it was still lower than the no packing one.It was greatly improved by using mesh type packing.

Reduced-space SQP algorithms for optimization of distillation column are studied.Variables decomposition is used to eliminate dependent variables and equality constraints,which reduce the dimension of QP sub-problems involved in iterations of SQP.Compared with the one based on orthonormal bases,reduced-space SQP based on orthogonal bases retains the convergence property while avoids QR decompositon.The improved computation efficiency is illustrated in a enzene/toluene distillation column optimization example, based on authors,previous work.

Nine novel fluorescent dyes of Benzoxanthene-3,4-dicarboxylic anhydride were synthesized through bromination,condensation,reduction,cyclization and imidation with 1,8-naphthalic anhydride as raw material.Their fluorescent and dyeing properties were studied.They can be used to color polyester fiber in fluorescent greenish-yellow hues of great brilliance with fastness to light:6～7．