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Current Issue
1996 Vol.13 Issue.1,
Published 1996-01-15
Article
Article
1
The Experimental Investigation on Mass Tranfer Characteristics of Moisture Regain Process in Coal
Liu Yaqin;Tang Xiao
In this paper, the moisture regain phenomenon of dry coal is investigated experimentally. It’s found that in the rnoisture regain process there are three characteristic stages. The effect of the environmental factors, the size of coal, the initial moisture content and the method of drying on moisture regain process is analyzed.
1996 Vol. 13 (1): 1-4 [
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1689
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5
The Modelling of Drying Process
Zheng Rao;Gu Fangzhen
In order to understand and analyse drying process and optimize its design,operation and control, mathematical model, simulation and optimization of drying process have been the main research directions. The modelling method and an example model by ODEs with 6 parameters were introduced in this paper.
1996 Vol. 13 (1): 5-9 [
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2249
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9
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10
Solid-Liquid Phase Transfer Catalytic Synthesis of Diethylene Glycol Monododecyl Ether
Ban Qing
The effect of catalysts, their quantities and reaction temperatuse on the yield of solid-liquid phase transfer catalyzed synthesis of dietylene glycol monododecyloxy ether have been studied. Some catalysts giving high yields of pure monoether (e. g, TBAB, PEG-400 and PEG-600) have been devoloped. Their suitable quanties applied and temperature of reaction were also determined.
1996 Vol. 13 (1): 10-13 [
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1740
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9
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14
Design of a Pilot-Plant for Producing Absolute Acohol by Pervaporation
Cai Bangxiao
A plate and frame module for pervaporation has been developed. The pervaporation pilot-plant with effective membrane area 16. 5 m2 has been designed. It is shown that the performances of the pervaporation pilot-plant are stable for producing absolute alcohol of more than 80 tons in one year after it is operated continually for 800 hours.
1996 Vol. 13 (1): 14-20 [
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1785
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9
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21
Simulation of High Pressure Carbamate Condenser and Urea-Synthesis Reactor
Li Fenghua
In this article different thermodynamic models rellated to urea synthesis process are summerized and high pressure carbamate condenser and urea synthesis reactor are simulated. The calulated results are in good agreement with those meassured in practical operation.
1996 Vol. 13 (1): 21-30 [
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2434
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9
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30
1996 Vol. 13 (1): 30-30 [
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1383
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9
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31
A Simple Method of Calculating Minimum Fluidization Velocity for Mono-Component Spherical Particles
Peng Hui;Zhang Jiyu
The minimum fluidization voidage dealing with the Geldartgroup B & D particles can be simply determined by an arbitrary loosing bulk method, which can be used to substitute for the normal fluidization curve method, i. e. minimum fluidization method. Then Ergun equation is employed to calculate the minimum fluidization velocity of particle.
1996 Vol. 13 (1): 31-34 [
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1693
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7
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35
Liquid-Liquid Equilibrium of Furfural-Water-Trichloroethylene and Simulation Calculation of Furfural Water Extraction
Gu Zhenggui;Lin Jun
Liquid-liquid equilibrum data of furfural water-trichloroethylene system were measured in an equilibrium still. These data were correlated with UNIQUAC eqution. The separation result of extraction of furfural water was obtained by simulation calculation with a computer.
1996 Vol. 13 (1): 35-40 [
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1693
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13
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41
Colour Reaction of 1- (2-Pyridylazo)-2-Naphthol Sulfonic Acid With Cadmium And It's Application
Du Bin;Wang Shuren
The conditions of colour reaction of cadmium with 1- (2-pyridylazo)-2-naphthol-sulfonic acid have been studied. The maximum absorbance of complex is at wave length of 536nm, its apparent molar absorptivty is 2. 9×10 4 L. mol-1 Beer's law is obeyed in the concentration range of 0～50μg/25ml, for cadmium. The common metal ions canbe separated by sulfhydryl cotton fiber with high selectivity. The method has been used to determine microamounts of cadmium in discharged water with satisfactiry results.
1996 Vol. 13 (1): 41-45 [
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1821
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8
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46
The Determination of Traces of Elements in Depoison Castor Dregs with ICP-AES Method
Han Yuanhua;Gao Baoyan
The Determination of traces of elements Ca, Mn, P, K, Cr, Co, Ni and Mo etc in depoison Caster dregs using ICP/EChelle Spectrome (American Leeman Labs.) is studied. The relative standard deviation is 4. 96% 10. 30%. The recovery rate is 90. 5%～101. 8%.
1996 Vol. 13 (1): 46-48 [
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1652
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9
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49
Development and Prospect of Controlled Release Technology
Feng Wenlai;Zhao Ping
In this paper, the controlled release technology is compared with other ordinary methods. The contolled release methods is categorized into physical methods and chemical mehtods. The advantages and limitations of various controlled release methods, release mechanisms ,preparation methods and future factors affecting release are discussed in detail. We also propose our view about the future development and application of the controlled release technology.
1996 Vol. 13 (1): 49-52 [
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1729
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9
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53
Contemporary Caprolactam Industry and Technology
Liu Hui
Caprolactam is an important product of petrochemical industry and also the monomer material for synthetic nylon fibre and engineering plastics, playing an important role in the devefopment of the socialist economy of our country. This paper prospects the future of caprolactam industry and technology basing on the explahation of several typical processes.
1996 Vol. 13 (1): 53-60 [
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1762
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8
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61
New Foreign Techniques in the Production of γ-butyrolactone and Tetrahydrofuran with Maleic Anhydride
Wang Duoren
New foreign techniques in the synthesis of γ-butyrolactone (γ-BL) and tetahydrofuran (THF) using maleic anhydride as raw materials are described. In these methods,the conversion of meleic anhydride is 100%, purity of γ-BL attained is as high as 99. 5%,and of THF 99. 95%. Uses of the products and the economic profit of manufacture are expunded.
1996 Vol. 13 (1): 61-64 [
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1797
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9
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