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Current Issue
1995 Vol.12 Issue.2,
Published 1995-04-15
Article
Article
1
Influence of the Different Preparation Conditions on the Photocatalytic Activity of TiO_2
Chen Shifu;Zhao Mengyue;Tao Yaowu
The influence of different preparation conditions on the photocatalytic activity of TiO_2 is studied.The results show that the preparation methods affect the photocatalytic activity of TiO2,the temperature and time of heating are the primary factors which affect the photocatalytic activity of TiO_2.The photocatalytic activity of TiO_2 is better when the anatase phase and the rutile phase coexist in a certain proportion.
1995 Vol. 12 (2): 1-8 [
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1651
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8
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9
The Synthesis of 1,2,4,5-Tetramethylbenzene from Alkylation of 1,2,4-Trimethylbenzene with Methanol Using Fluoride Modified Zeolite HZSM-5
Wang Ling;Zang Yaru;Tao Keyi;Li Hexuan
The effects of reaction time, NH_4F concentration and calcination temperature on the catalytic character were studied.The acidity and structure of the modified catalyst were also determined SEM, IR and TPD.
1995 Vol. 12 (2): 9-13 [
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1819
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8
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14
The Production of Dimethyl Carbonate by Ester Exchange Method
Yuan Jitang; Wang Lianshun;Yin Jinzhu
In the present paper the comparison of the properties of many homogene ous and heterogeneous catalysts for DMC synthesis by ester exchange method has been made.The vapor-liquid equilibrium property for the binary system of MeOH-DMC has been given. The separation methods of the azeotrope formed by the above binary system have been described,the technological process for the DMC production by the ester exchange method has been desig ned,and the mass flows and raw material consumptions of the designed pro cess have been tabled.
1995 Vol. 12 (2): 14-21 [
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1762
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9
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21
1995 Vol. 12 (2): 21-21 [
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1460
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9
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22
A New and Simple Way to Design Oscillating Reaction ──Decomposition and Coupling
He Zhanbo
The author suggests a new and simple way to design the oscillating reaction by the method of decomposition and coupling, which involves its significance, experimental process and advantage over other methods.It is pointed out specially the mistake of isolation method in determining the concentration range of oscillation,as well as the changes of the rate additivity in the mathematial model of oscillating reaction.
1995 Vol. 12 (2): 22-26 [
Abstract
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1654
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9
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27
The Gas-Solid Flow in Downcomer of Circulating Fluidized Bed I──Particle Flow
Dong Zhongbing;Zhao Lianzhong;Yang Guilin
The partical flow pattern in a downcomer of circulating fluidized bed with fluidized-bed catalytic cracking catalyst or silica gel were investigated by means of measuring the local patical velocity and local particle concentration
1995 Vol. 12 (2): 27-33 [
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1651
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9
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34
The Synthesis of Maleic Anhydride/Styrene Sulfonic Acid Copolymer
Sun Qinglin;Zhang Shuqing
The copolymer of maleic anhydride and styrene sulfonic acid was synthesized by copolymerization of maleic anhydride and styrene and then sulfonized.The sulfomation conditions were studied and the linear sulfonating product was obtained.
1995 Vol. 12 (2): 34-36 [
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1798
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8
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37
The Synthesis of Red Base B by Phosgenation Process
Liu Zhenhua;Tang Peikun
The traditional process of the synthesis of Red Base B is the Nbenzenesulfonylation,nitration and hydrolysis of O-anisidine. We used the process of N-phosgenation, nitration and hydrolysis of O-anisidine.This process may reduce the total raw material cost over 15 600 per ton of Red Base B.
1995 Vol. 12 (2): 37-40 [
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1789
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8
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41
1995 Vol. 12 (2): 41-43 [
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1484
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9
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44
1995 Vol. 12 (2): 44-45 [
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1445
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8
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46
A Study of Exactitude in Diffusivity Measurements by Higbie′s Penetration Theory
Xu Yingnong
A wetted column was used to measure the rate of absorption of carbon dioxide in aqueous polymer solutions.The experimental results showed that the exactitude in diffusivity calculation by Higbie′s penetration theory can be ensured when dimensionless contact time t<0.1.
1995 Vol. 12 (2): 46-48 [
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1672
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9
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49
1995 Vol. 12 (2): 49-54 [
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1340
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9
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55
1995 Vol. 12 (2): 55-58 [
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1412
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9
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59
1995 Vol. 12 (2): 59-62 [
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1517
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9
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62
1995 Vol. 12 (2): 62-62 [
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1338
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9
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63
1995 Vol. 12 (2): 63-63 [
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1326
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9
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