关闭×
化学工业与工程
Home
|
|
About Journal
|
Editorial Board
|
Instruction
|
Subscriptions
|
Download
|
Publication Ethics
|
Contacts Us
|
Chinese
化学工业与工程
Office
Author Center
Peer Review
Editor Work
Office Work
Editor-in-chief
Journal
Current Issue
Next Issue
Archive
Advanced Search
Read Articles
Download Articles
Email Alert
Current Issue
2004 Vol.21 Issue.5,
Published 2004-09-15
Article
Article
313
CFD Simulation of Backmixing of the Liquid in Structured Packing Column
CHEN Bao-wei,ZENG Ai-wu g Research Center of Tianjin University,Tianjin 300072,China)
By analyzing the flow channel in the structured packing, three basic structure cells in the structured packing:single cross-over in the same set of packing, the cross-over of the 90° turn on the boundary of the two sets of the packing and the packing structure next to the wall were proposed. RNG k-ε turbulent model was selected to perform CFD simulation of the 3-D flow of the liquid in different structure cell and the simulation showed that different structure cell had different flow characteristics. Furthermore, incentive and response technology of the tracer was used to study the axial backmixing of the liquid in different structure cell.
2004 Vol. 21 (5): 313-316 [
Abstract
] (
1799
) [
HTML
0KB] [
PDF
0KB] (
8
)
317
Synthesis of Silicon Phthalocyanine Dihydroxide
XUE Jin-qiang,WANG Shi-rong,LIU Xian-feng,LI Xiang-gao
In this paper,the synthesis of dichloro (phthalocyanino) silicon is studied. Dichloro (phthalocyanino) silicon is obtained by adding the product into methanol. Dichloro (phthalocyanino) silicon is converted to silicon phthalocyanine dihydroxide by adding the dichloro (phthalocyanino) -sulfuric acid solution into cold water, the total product yield is 77%. Compared with the traditional alcoholysis, this route can enormously improve the reaction yield, and their structures are confirmed by IR.
2004 Vol. 21 (5): 317-320 [
Abstract
] (
2461
) [
HTML
0KB] [
PDF
0KB] (
4
)
321
Studies on the Reaction of Chloride Polyether Polyol with Dimethyl Phosphite
ZHANG Tian-lin~1,LI Zai-feng~2,JIA Hai-hong~1
The flame retardant polyether polyol(HIROL) containing phosphorus was synthesized with dimethyl phosphite and high reactive chloride polyether polyol(CHIRO) which had chloromethyl group in side chain. The effect of process conditions, such as microwave, reactant ratio, catalyst and solvent etc, on the nucleophilic substitution and yield of product were investigated. The results showed that when the content of phosphorus reached 141%—673%, HIROL was a transparent amber liquid whose viscosity was 0359—0668 Pa·s. Then oxygen index of flame retardant soft PU foam composed of HIROL was 226—283 and the other mechanical and technical parameters were in accord with those in GB12080-89.
2004 Vol. 21 (5): 321-324 [
Abstract
] (
1882
) [
HTML
0KB] [
PDF
0KB] (
6
)
325
Effect of Different Reductive on Pd/γ-Al_2O_3 Catalyst
ZHANG Yue~1,MA ZHi~
Two Pd/γ-Al_2O_3 catalysts were reduced by H_2 and KBH_4 respectively and their catalytic activities in anthraquinone hydrogenation to produce H_2O_2 were introduced.Results indicated the catalyst reduced by KBH_4 showed higher activity and longer service life than that reduced by H_2. Surface analysis of the two catalysts was carried out.
2004 Vol. 21 (5): 325-326 [
Abstract
] (
1696
) [
HTML
0KB] [
PDF
0KB] (
5
)
327
Influence of Permanent Magnetic Field on the Molecular Mass-Transfer Process in Gas Phase
JIA Shao-yi,LI Lei,WU Song-hai
In the magnetic field which has different intensity of magnetization, the influence of permanent magnetic field on the molecular mass-transfer process in gas phase was investigated. The results indicate that magnetic field have positive effect on the molecular mass-transfer process of water,methanol,ethanol,formic acid and acetic acid in the air,viz diffusivity increase in the magnetic field. The quantitative account shows that the diffusivity increases 4%—7%, magnetic field have no effect on the molecular mass-transfer process of benzene,toluene,acetone and methyl ethyl ketone in the air. Through analyzing on experimental result, the mechanism of permanent magnetic field on the molecular mass-transfer process in gas phase was discussed.
2004 Vol. 21 (5): 327-330 [
Abstract
] (
1798
) [
HTML
0KB] [
PDF
0KB] (
6
)
331
Study on the Surface Modification of Hydrotalcite
YANG Wen-hu, LIU Bin, MA Zhan-feng, XI Bao-feng ctric Power Equipment,Shanxi Xi'an 710049,China)
Hydrotalcite was surface modified by using sodium stearate. The factors of different treatment conditions such as temperature, time, amount of modifier, were analyzed. X-ray and FTIR were performed to characterize the hydrotalcites before and after treated. Results show the activation index was a fairly well coefficient to denote the treating effect and this promoted the application of this novel flame-retardant in industry.
2004 Vol. 21 (5): 331-333 [
Abstract
] (
1801
) [
HTML
0KB] [
PDF
0KB] (
5
)
334
Catalytic Reduction of SO_2 by CO over LaCoO_3 in O_2 Atmosphere
ZHAO Xiao-ming,QIN Yong-ning,MA Zhi
LaCoO_3 is used in the reduction of SO_2 by CO in O_2 atmosphere.As a catalyst,the effects of catalysts volume and temperature on reaction have been analyzed.And it verifies that phases of La_2O_2S and CoS_2 are the active phases.By comparing the XRD spectrum, a mechanism is proposed to describe the reason why LaCoO_3 deactived in O_2 atmosphere and the effect of O_2 on reduction of SO_2 by CO.
2004 Vol. 21 (5): 334-336 [
Abstract
] (
2283
) [
HTML
0KB] [
PDF
0KB] (
6
)
337
Synthesis of Porous Fe_2O_3/SiO_2 Composite Microspheres
ZHANG Zhi-chao~1, LI Wen-bin~2,WAN Qian-hong~2
Monodisperse microshperes consisting of urea-formaldehyde(UF) resins,Fe_2O_3 and SiO_2 were prepared by dispersion polymerization.Different influences on the dispersive extent and the magnitude of the microshperes in different conditions were investigated.The composite microspheres were then submitted for heat treatment to burn out the polymer template and render the remaining particles magnetizable.In this process α-Fe_2O_3 was partly transformed into γ-Fe_2O_3.SEM micrograph of the UF resins/Fe_2O_3/SiO_2 microspheres and XRD spectrum of the Fe_2O_3/SiO_2 microspheres showed that the Fe_2O_3/SiO_2 microspheres were porous,monodisperse and magnetizable.
2004 Vol. 21 (5): 337-339 [
Abstract
] (
1575
) [
HTML
0KB] [
PDF
0KB] (
6
)
340
Preparation of TiO_2/PS Composite Microspheres by In-Situ Emulsion Polymerization
LI Li,GAO Jian-ping,XIANG An
In this paper,the composite microspheres of TiO_2/PS(titania/polystyrene)were prepared by in-situ emulsion polymerization.Their reactive conditions and their structure were explored by infrared spectrum (FTIR),transmission electron microscopy (TEM) and differential thermal analyzer (DTA).The results show that TiO_2/PS mono-dispersed composite microspheres with different diameters can be prepared by in-situ emulsion polymerization.In order to get the composite microspheres,it is necessary that the pH of the medium should be above 7 and the amount of emulsifier should be below the critical micelle concentration (CMC).The size of composite microspheres increases with the increasing of styrene concentration.
2004 Vol. 21 (5): 340-343 [
Abstract
] (
2290
) [
HTML
0KB] [
PDF
0KB] (
5
)
344
Preparation of NiFe_2O_4 Nanocrystalline by Stearic Acid Gel Method
MENG Jian-hua,YANG Gui-qin,WANG Xiu-yu,YAN Le-mei,HAN Bing
In this paper,NiFe_2O_4 nanocrystalline particulates were prepared by stearic acid gel method.The products were characterized by TG-DTA,XRD and TEM and were compared with those fabricated by co-precipitation.The results showed that NiFe_2O_4 nanocrystalline prepared by stearic acid gel method had average distributed uniformity and small grain size without aggregation.
2004 Vol. 21 (5): 344-346 [
Abstract
] (
1550
) [
HTML
0KB] [
PDF
0KB] (
6
)
347
Development of EVA Low Temperature Flow Improver for Diesel Fuel
YANG Zhi-yong,WANG Yi-ping,ZHOU Dan,HU Rui-jie,ZHANG Jin-li
The preparation of EVA-type low temperature flow improver for diesel fuel was studied.The factors of the polymerization were investigated,such as the pressure,the temperature,the initiator concentration and the vinyl acetate concentration,in order to obtain the principles of adjusting the viscosity,the vinyl acetate content and decreasing degree of the cold filter plugging point for the product.Additionally the mechanism of the synthesized low temperature flow improver was explored preliminarily using XRD and DSC.
2004 Vol. 21 (5): 347-350 [
Abstract
] (
1627
) [
HTML
0KB] [
PDF
0KB] (
6
)
351
Progress in Titanium Catalysts Used for Epoxidation of Allyl Chloride
WANG Qing-fa,WANG Li School of Chemical Engineering,Tianjin University,Tianjin 300072,China)
Epichlorohydrin is an important chemical intermediate with wide and prosperous application.In this paper,the recent progress in the synthesis of epichlorohydrin by direct epoxidation of allyl chloride catalyzed by TiO_2/SiO_2,TS-1 and the modified TS-1 catalysts is introduced.The features and prospect of the different processes are discussed.The difficulties in the research of direct allyl chloride oxidation and the developing trend are pointed out.
2004 Vol. 21 (5): 351-355 [
Abstract
] (
1692
) [
HTML
0KB] [
PDF
0KB] (
6
)
356
Progress in Parameters Measurement and Regime Identification Methods on Loop Reactors
JIA Yan-zong,MA Pei-sheng,WANG Yan-fei,HE Cui-ying
Loop reactors present some advantages:a simple construction without internals or moving parts,good heat and mass transfer capacity at low energy consumption and low shear stress with little damage to cells,so they are preferentially used for chemical,environmental and biochemical applications.Measurement techniques on gas holdup and liquid circulation velocity in loop reactors and identification methods of homogeneous regime and heterogeneous regime are summarized.Some tendencies on further development are presented.
2004 Vol. 21 (5): 356-360 [
Abstract
] (
1686
) [
HTML
0KB] [
PDF
0KB] (
6
)
361
Organic Reactions in Microemulsion
DING Feng~1,YI Hong-zhu~1,LI Gang~2,XIN Feng~1
This is a general review on the applications of microemulsion for the media in organic reactions, which includes the reactions of electrophilic substitution, nucleophilic substitution,nucleophilic addition, hydrolysis of esters, oxidation and carbonylation, and the effects of intensification or restraint have been summarized. On the basis of the preliminary analysis of the mechanisms, several pivotal questions which should be solved in the future research have been mentioned.
2004 Vol. 21 (5): 361-366 [
Abstract
] (
1681
) [
HTML
0KB] [
PDF
0KB] (
6
)
367
Progress in Melt Crystallization and Its Hybrid Technique
LIU Hai-dao, YIN Qiu-xiang
The progressive freezing and suspension melt crystallization processes and their characteristics were introduced, and then the research progresses up to date in the new melt crystallization techniques and equipments were reviewed. Especially, developments of the application of the hybrid techniques in melt crystallization processes were presented in detail. In addition, the developing tendency of the melt crystallization technology and equipments was prospected.
2004 Vol. 21 (5): 367-371 [
Abstract
] (
1654
) [
HTML
0KB] [
PDF
0KB] (
5
)
372
Progress in Synthesis of 3,5-Difluoroaniline
ZHANG Chun-yan,FENG Ya-qing
In this paper,ten synthetic routines of 3,5-difluoroaniline from different raw materials and their characteristics were discussed in detail.It is suggested that the synthetic methods using m-phenylene diamine,2,4-difluoroaniline as raw materials have the potential industrial application in China.
2004 Vol. 21 (5): 372-375 [
Abstract
] (
1641
) [
HTML
0KB] [
PDF
0KB] (
5
)
376
Measurement of the Inter Liquid Diffusion Coefficients in Zeolite Catalysts
LI Xue-feng, ZHENG Xin-yuan, FU Ji-quan
The inter diffusion characteristics of benzene and isopropyl benzene in zeolite catalysts were studied by the simple and practical method.Based on measuring the different concentrations of diffusion solute in all time,the inter coefficients of all diffusion solute in zeolite catalysts were correlated in terms of rational mathematical model and least square fitting.This can supply fundamental data for the industrial simulation of benzene alkylation.
2004 Vol. 21 (5): 376-378 [
Abstract
] (
1791
) [
HTML
0KB] [
PDF
0KB] (
6
)
379
Process Optimization of Residual Catalytic Cracking Reactor-Regenerator System
CHANG He-ying~1,HAN Jin-yu~1,WANG Hua~1,HE Xiu-yun~2
By using of thirteen lumped kinetic models,the simulation calculation for fluidized catalytic cracking unit with capacity of residual 6×10~5 (t/a) in Daqing Oilfield Chemical Plant was carried out.The effect of feedstocks ratio,reaction temperature,dispersion steam quantity and fast cooling oil quantity on product distribution have been investigated and the process is optimized.The results of simulation were very comparable with the actual operational data.
2004 Vol. 21 (5): 379-382 [
Abstract
] (
1630
) [
HTML
0KB] [
PDF
0KB] (
5
)
383
A New Process of Synthesizing Phenylacetaldehyde as a Perfume
WANG Ping, WANG Shi-ming,ZHANG Jian-cheng
Phenylacetaldehyde,a perfume,was prepared by reaction of phenylethlene glycol catalyzed by zeolite ZSM-5 which is treated by hydrochloride acid.The conditions of the reaction were optimized by orthogonal test and the mechanism was analyzed.The percentages of the conversion and the yield were determined and the factors influenced on the reaction were discussed.
2004 Vol. 21 (5): 383-384 [
Abstract
] (
1751
) [
HTML
0KB] [
PDF
0KB] (
6
)
385
Studies on the Recovery of Silver from Waste Dregs
HU Zhang~1,WANG Peng~2
The solution of silver nitrate was obtained by treating the silver-contained waste liquid and waste dregs with the solution of hydrochloric acid,transforming the sediments with the solution of potassium carbonate and potassium hydroxide,and dissolving the transformed sediments in dilute nitric acid.The solution of silver nitrate could be concentrated and crystallized or re-crystallized so as to get the solid silver nitrate,the content of which was obove 99.8%,and the amounts of impurities were complied with the national products level of analytical reagent(A.R).
2004 Vol. 21 (5): 385-387 [
Abstract
] (
1634
) [
HTML
0KB] [
PDF
0KB] (
4
)
388
Research Actualities and Application of Catalytic Distillation Technology
FENG Dong-mei,LIU Xue-nuan
Catalytic distillation,a new technology developed rapidly in 1980s,provides lots of advantages such as less investment,lower energy consumption and higher selectivity.In this article,the progress and applications of the catalytic distillation are reviewed.The catalytic distillation column and the catalysts are introduced.The sructure and packed way of catalyst bed,mass transfer and the mathematic models in the column are summarized.Some key problem for development in this traditional discipline are discussed.In addition,the developing tending is proposed and the existing problems are pointed out.
2004 Vol. 21 (5): 388-391 [
Abstract
] (
3124
) [
HTML
0KB] [
PDF
0KB] (
5
)
News
More
·
《化学工业与工程》入编2020年版《中文核心期刊要目总览》
·
·
《化学工业与工程》创刊30周年庆
·
·
2012年第4期目录
·
2012年第3期目录
·
·
Links
More
·
www.ccs.ac.cn
·
www.tju.edu.cn
Copyright ©2020 Chemical Industry and Engineering, all rights reserved.
Tianjin University 50A305, No.135 Yaguan Road, Haihe Education Park, Tianjin 300350, China
Tel: 86-22-27406054; E-mail:
hgbjb@tju.edu.cn
Support by
Beijing Magtech Co.Ltd
, E-mail:
support@magtech.com.cn
