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Current Issue
2001 Vol.18 Issue.2,
Published 2001-03-15
Article
Article
63
Study on the Condition of Phase Separation in Multicomponent Solution
WANG Hong bing, YANG Zhi cai, CUI Xian bao, QU Hong mei
In this paper, by calculation of the modified UNIQUAC equation, we have acquired the result of binary, ternary and quartery solution Liquid Liquid equilibrium data with Netwon Raphson method. When activity coefficient of some components with partly miscible solution have a increasation steeply, this solution will become two liquid phase. So the condition of phase separation for multicomponent solutions is that activity coefficient of some components have a increasation steeply at phase interface with partly miscible solution.
2001 Vol. 18 (2): 63-70 [
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71
Preparation of Gelatin Hydrolyzate with AS1.398 Neutral Protease(Ⅰ)——Study of Reaction Rules
HUANG Ya qin, LENG Yan guo, HUANG Ming zhi
In this paper, the influences of temperature, pH value, reaction time and amount of enzyme on the hydrolysis process of gelatin by natural AS1.398 neutral protease were investigated. The possibility of AS1.398 neutral protease applied in technology for preparation of gelatin hydrolyzate was discussed.
2001 Vol. 18 (2): 71-74 [
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2020
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75
Preparation of Gelatin Hydrolyzate with AS1.398 Neutral Protease(Ⅱ)——Study on Immobilization of Enzyme
HUANG Ya qin, LENG Yan guo, HUANG Ming zhi
AS1.398 neutral protease was immobilized to chitosan with glutaraldehyde as crosslinking agent. The effects of temperature, pH, amount of cross linking agent and ratio of enzyme to carrier on the activity of the immobilized enzyme were demonstrated, and the optimum immobilization condition of AS 1.398 neutral protease was established.
2001 Vol. 18 (2): 75-78 [
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79
Survey of Researches on Scale Inhibition Mechanism of Scale Inhibitor
WANG Rui 1, ZHANG Qi 1, DING Jie 2, SHEN Zi qiu 2
Firstly, a brief retrospect was given on the development of scale inhibitors. Then, some aspects related to the research of scale inhibition mechanism of scale inhibitors and evaluation methods of the performance of scale inhibitors, as wellas the retarding effect on saline water deposition of scale inhibitors were reviewed. Based on the above survey, some aspects remain to be investigated further were proposed.
2001 Vol. 18 (2): 79-86 [
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87
Synthesis and Application of 2-Aamino-6-chloropurine
ZHAN Pei ying, FENG Ya qing,ZHANG Wei hong
This paper reviewed the synthetic methods and applications in the pharmaceutical field of 2 amino 6 chloropurine basing on many recent document.2 Amino 6 chloropurine is an important pharmaceutical intermediate for production of the compound useful as an antiviral, anticancer, anti inflammatory and hypotensor drugs. The synthetic methods of 2 amino 6 chloropurine comprises guanine reacting by chlorine sparging, guanine reacting directly with chlorinating agent, guanine protecting by acyl group and then reacting with chlorinating agent, derivative of pyrimidine reacting with chlorinating agent thereafter ring closing etc. The last two methods were sensible for there simple industrial art, moderate operating condition and high yield.
2001 Vol. 18 (2): 87-92 [
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1938
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93
Application of Surfactants in the Study of Nonlinear Chemical Kinetics
HE Zhan\|bo
With chemical oscillations as examples,various applications of surfactants in the study of nonlinear chemical kinetics had been summarized systemically,including the effects on the known oscillating reactions,inducing some reactions to oscillate,liquid membrane oscillators and the application of exploring isokinetic relationship in complexity reactions.
2001 Vol. 18 (2): 93-98 [
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99
Basic Study on Taxol Separation from the Organic Solvents in Two-Liquid-Phase Cultures of Taxus Cells
CHEN Hai\|tao,WEI Zuo\|jun,YUAN Ying\|jin
Taxol separation from the organic solvents in two\|liquid\|phase cultures of Taxus cells is a important and necessary step to realize commercial\|scale production of taxol.According to the properties of taxol and the organic solvents,a novel and effective method was proposed for separating taxol from the organic solvents.This method is called multi\|element\|extraction one,of which principles were explained correctly.On the basis of the method,the distribution coefficient of taxol between different aqueous phase and organic phase were obtained through experiments,which are the basis for optimal design of taxol separation technology.
2001 Vol. 18 (2): 99-102 [
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103
Experimental Research of Liquid-Liquid & Gas Jet Pump
YU Jian-liang,GUO Xue hua,HU Xiao shi
Liquid-liquid & gas jet pump is a kind of liquid jet pump which can pump two-phase liquid and gas fluid.First,the principals of liquid-liquid & gas jet pump and the deduction of the fundamental characteristic equations are described in the thesis.The ratio of the gas in the jet-eliciting medium β (gas ratio)is used as a parameter.The fundamental characteristic equations of liquid-liquid & gas jet pump are got through the characteristic experiments.This equation can be applied to the liquid\|liquid or liquid\|gas jet pump.The fields it is fit in are extensive and it can be used as the reference for engineering design.
2001 Vol. 18 (2): 103-108 [
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109
Regeneration of Activated Carbon with Toluene by Microwave Radiation
NING Ping,TIAN Sen\|lin,WANG Xue\|qian,CHEN Hai\|yan
This paper presents a new method of regenerating activated carbon with toluene by microwave radiation.By orthogonal experiment,the connections between ratio of deadsorption and influencing factors:quantity activated carbon,power of microwave,surface speed of carrier gas and regeneration time are staudied.Optimized conditions of regeneration are summarized.Velocity curve of regeneration is determined.Factors,which affect Activated carbon ullage,are analyzed.Recovering process of toluene is researched also.
2001 Vol. 18 (2): 109-114 [
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1962
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115
Experimental Study on the Concentration of Dilute Sulfuric Acid by Spray Evaporator
ZHOU Zhi\|ming\ LIU Zhong\|hai\ ZHAO Deng\|wu
The dilute sulfuric acid is concentrated by spray evaporation.A series of experiments are carried out and the results are analyzed.The effects of inlet air flow rate,air temperature and liquid flow rate on the concentration of concentrated sulfuric acid are studied.A reasonable empirical equation is also obtained by regressing the experimental data.
2001 Vol. 18 (2): 115-119 [
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120
Experimentation for Selection Material of Equipment for Preparation of Diethyl Oxalate by CO Coupling- Regeneration Reaction
WANG Bao\|wei,MA Xin\|bin,XU Gen\|hui
This paper discussed the material of equipment which was used to prepare diethyl oxalate by CO coupling\|regeneration reaction with the method of weight.The seven kinds of metal material,such as 306,314L,316L,Zr,Ti(2),Ti(10),1Cr18Ni9Ti and one kind nonmetal material(PE)have been hung in the liquid compound in the regeneration reactor for 1500hours.The experiment indicative that the corrosion rate of the 306 is the biggest,in the after is 316L,Ti(10),1Cr18Ni9Ti,zincorium(Zr),Ti(2),that of PE is lest;1Cr18Ni9Ti is the better material of equipment.
2001 Vol. 18 (2): 120-124 [
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125
2001 Vol. 18 (2): 125-125 [
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