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Current Issue
2000 Vol.17 Issue.3,
Published 2000-05-15
Article
Article
125
Study on Model Used in the Chromatography Process of Taxol and Cephalmonnine(Ⅰ)
YANG Jun,LIU Bin,YUAN Ying jin
The general rate model considering axial dispersion,film mass transfer and effective diffusion in particle was adopted to study the chromatography process of taxol and cephalmonnine.The finite element and orthogonal collocation method was used to transfer these equations to ordinary differential equations and to solve them.The comparison between theory and experiment showed that the model could be agreement with the experimental data very well.In addition,the experiment also showed that axial dispersion is not the main factor affecting the chromatography separation of taxol and cephalmonnine.This made the operation could be done under high linear velocity of flow phase.
2000 Vol. 17 (3): 125-130 [
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131
Study on the Model Used in the Chromatography Process of Taxol and Cephalmonnine(Ⅱ)
LIU Bin,YANG Jun,YUAN Ying jin
On the basis of the general chromatography rate model,the effects of Bi number, η number,mass transfer Pe L number,particle diameter,injection and ratio of solute diameter and pore diameter on the chromatographic peak of taxol and the separation of taxol and cephalmonnine were simulated with computer.The essential factors affect on the chromatographic process of taxol and cephalmonnine were obtained and a more useful theory was provided to direct the chromatography separation of taxol and cephalmonnine.
2000 Vol. 17 (3): 131-135 [
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136
Study on Microbial Electrode for Real Time Monitoring Used in Wastewater Biotreatment Engineering(Ⅱ)——Theory of Microbial Electrode
WU Jun xia 1,WU Yang 1,WANG Jia qi 1,LU¨ Ming xiang 1,SONG Ya wen 2,JI Ming 2
According to Albery's theory,the Michaelis Constant and kinetic behavior of the microbial electrode were sutdies,and the result showed that the rate controlling steps of the areobic microbil electrode reaction were influenced by the substrates.The Mchaelis constant, K m and the effective electrochemical rate constant k′ ME have been determined.
2000 Vol. 17 (3): 136-140 [
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141
The Development and Application of Liquid-Liquid Hydrocyclone
ZHAO Qing guo
Hydrocyclone is mainly developed for the oil water separation system in offshore oil production.In this paper,the fundamental characteristic parameters of hydrocyclone and the state of the arts of its industrial use are presented.The related research work is reviewed from three aspects:laboratory,simulation and application.Finally,the problems in the present research field are pointed out and some useful opinions are given.
2000 Vol. 17 (3): 141-148 [
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149
The Evaluation Methods for Critical Parameter
ZHANG Hong yan,MA Pei sheng
Critical properties are one of the most important properties for pure chemical substances.Since they are very difficult to determine by experiment especially for unstable substances,it is necessary to find some good evaluation methods.Now the scientific workers can evaluate them by Group contribution methods,some equations using other normal properties and some equations using the existed equation for other properties.In this paper these methods are described and compared espacially the methods on the base of rackett equation.
2000 Vol. 17 (3): 149-155 [
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155
The Conglomeration of Particles in Nanometer Powders Prepared by Sol-gel Method
ZHANG Xi mei,LI Lin,GUO Si yuan,CHEN Ling
Preventing agglomeration of particles is the most important problem in the preparation of the nanometer powders by means of sol gel method. The causes of agglomeration for particles were analyzed,and several methods for preparation of free agglomeration nanometer powders were disscused in this paper. Ultrasonic technique was newly proposed to be applied in the sol gel process to avoid the formation of agglomeration.
2000 Vol. 17 (3): 155-159 [
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160
A New Biological Catalyst——Catalytic Antibody
TANG Yin jie,ZHAO Xue ming,BAN Rui,WEI Zuo jun,HONG Xue chuan
The highly complementary binding interactions of catalytic antibodies with transition analogies can be exploited to catalyze chemical reactions by the overall mechanism of transition state stabilization.In this paper,a full overview is given on the new mythical catalyst which including its history of development,structure character and function,relation to enzyme and the ways of producing and application for catalytic antibody.
2000 Vol. 17 (3): 160-163 [
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1635
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164
Research Actualities and Application of Reactive Distillation Technique
LIU Xue nuan,LI Yu qiu
In this article,the development and the application of the reactive distillation are summed up.The reactive distillation column and the catalysts are introduced.The mass transfer and hydraulics in catalytic bed,the mathematic models and the design equation of the reactive distillation column are summarized.The application and the possible field of the reactive distillation are also mentioned.
2000 Vol. 17 (3): 164-168 [
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169
Preparation of Solid Super Acid Catalyst of AlCl_3 Supported Exchange Resin
ZHAO Xiao jun,YIN Chang chun,CHEN Xu,ZHANG Xiang dong
Using D72 and D61 macroporous resin and aluminium trichloride,macroporous sulfoacid ion exchange resin aluminium trichloride super acid were prepared by liquid solid solvent method.The effects of various factors were determined and the esterification applications were studied. Adopting liquid solid method,methanol and alcohol were acted as solvent,but alcohol was better.Under the condition of reaction temperature 78℃,dryness time 30h,reaction time 6h,the catalyst containing Al 2.78% was obtained. The results of catalytsis shown that the catalyst has higher catalytic esterification to some carboxylic acid esterification.
2000 Vol. 17 (3): 169-173 [
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174
Study on the High Octane Number Leadless Gasoline Blending
HAN Jin yu 1,HAN Zhen qi 2,CHANG He ying 1,WANG Hua 1,WANG Xue gang 2
The blending experiments for producing leadless gasoline for vehicle such as 90 #,93 # and 95 # gasoline were carried out,using the catalytic cracking gasoline and straight run distillate produced by Huabei Oil Field. First Refinery as main components, MTBE and No.2 benzene as blending components and MMT as antiknock additive.The reasonable blending schemes for 90 #,93 # and 95 # leadless gasoline were determined respectively by comparison tests of various blending components under different proportions.The comprehensive analysis data of 90 #,93 # and 95 # leadless gasoline samples showed that they have completely met the industrial standard of SH0041 93.The results will enable the leadless gasoline to be produced in series and then bring a remarkable profit for the refinery.
2000 Vol. 17 (3): 174-176 [
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177
2000 Vol. 17 (3): 177-183 [
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184
2000 Vol. 17 (3): 184-186 [
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186
2000 Vol. 17 (3): 186-187 [
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