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Current Issue
1999 Vol.16 Issue.6,
Published 1999-11-15
Article
Article
311
Study on Epoxidation Process for propylene with H_2O_2 ——Solubility of Propylene in Aqueous Methanol
Chen Xiaohui Xu Xien
In this article VLE data for ternary system (propylene methanol water) under 30℃～60℃,0 3 MPa～0 9MPa were determined with static equilibrium still and were correlated by using van Laar RK model.The mass ratio of methanol to water was 9∶1、8∶2、7∶3.The results indicated that the models were suitable for the ternary system and the data were reliable.
1999 Vol. 16 (6): 311-315 [
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316
A Study of Photocatalytic Activity of Perovskite LaFeO_3
Fu Xixian Yang Qiuhua Bai Shulin Sun Yihuan Wang Junzhen Zheng Xiaoyan
A Series of perovskite oxides LaFeO 3,LaFe 1- x Cu x O 3 and La 1- x Ca x FeO 3 by complex method of citric acid were prepared.The photocatalytic activity of these compounds has been tested by photodegradation of water soluble dyes.The doping effect on photocatalytic activity of LaFeO 3 was discussed.
1999 Vol. 16 (6): 316-319 [
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320
Synthesis of Acrylic Alkyd Resin Paints
Qu Jinqing Tu Weiping Yang Zhuoru Chen Huanqin
An acrylic modified alkyd resin was prepared by monoglyceride and the effects which affect paint properties were discussed.This kind of resin as a paints provide a lot of advantage such as fast surface dry in air and high hardness.The optimal formula is determined by the way of orthogonal experiment method.
1999 Vol. 16 (6): 320-324 [
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325
The Effect of Side Reaction on Synthesizing Carbamoyethyl Starch
Cheng Fa Zhang Lei Zhang Ming Zhang Jingwu
Using the cassava oxidized starch has been synthesized carbamoylethyl starch(CES)with different degrees of substitution( D.S ).By analyzing the effect of the concentration of NaOH,reaction time,reaction termperature and the weight of acrylamide on the D.S (N). D.S (Na)of etherified products and the total rate of etherification,we studied the side reaction of synthesizing carbamoylethyl starch.Results show that the extent of reaction of strach with acrylamide is governed by aforementioned factors.Furthermore,the best etherification conditions are the weight of acrylamide[0 2mol/mol (starch)],the concentration of NaOH(0 1 mol/L),reaction temperature(40℃),reaction time (4h).When the side effcct on carbamoylethylation is the weakest,the total of rate of etherification reaches 72 6%.
1999 Vol. 16 (6): 325-329 [
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330
Treatment of Waster from Intermediate p-Aminophenol Manufacturing Process with Ferrous Hydrogen Peroxide Method
Zhang Pingfan Wang Yiping Li Wei Guo Cuili
It is indicated that the industrial containing p aminophinol (PAP) wastewater can be treated effectively by the H 2O 2 Fe 2+ oxidation method.As the wastewater contained 1 6g/L~2 0g/L PAP and the reaction proceed under the conditions of:H 2O 2/PAP=4 0(g/g),the concentration of FeSO 4·7H 2O=1 0g/L.after one hour the total PAP removal effectively is up to 98%～99% and the color degerr is reduced.This treatment method has no severe demand for the temperature and is convenieut for industrial applications.
1999 Vol. 16 (6): 330-334 [
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335
The Exploration and Application of the Biological Materials——Chitin/Chitosan
Yang Dongmei Miao Jinkang Huang Mingzhi
Chitin/chitosan is a very valuable natural resource for human being.In this paper,a survey concerning their structure and properties,the methods of preparation and characterization,as well as their application in the areas of medicine,industry,agriculture were briefly ascribed.The problems demanded further research for better developing the exploration and application of the chitin/chitosan were emphasised.
1999 Vol. 16 (6): 335-340 [
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1760
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341
Solid Separation Membranes and Their Manufacturing
Xu Haiquan Jiang Zhongyi Lui Jiaqi
After a brief introduction of membrane sort and the developing history of membrane manufacturing technology, the materials,the procedure and feature of the polymeric membranes, inorganic membranes and adsorbents filled pdymeric membranes are commented emphatically and systematically. The developing tendencies of the membranes were disussed.
1999 Vol. 16 (6): 341-346 [
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347
Development and Application of PEN Polyester
Jia Hongtao Sheng Jing
In this paper, the synthesis ways, the properties, the recent development and application of polyethylene naphthalate (PEN) are reviewed The synthetic methods of raw material(NDA or NDC)are also introduced in detail The physical and mechanical properties are also given
1999 Vol. 16 (6): 347-353 [
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1600
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354
Photocatalytic Degradation of Phorate in Wastewater by TiO_2
Gu Fengcai Wang Jinming Liu Chao
The photocatalytic degradation of phorate in wastewater, which is one of the typical refratory biodegradable and photostable orgaophosphorus pesticides,was studied using TiO 2 partical and loaded TiO 2 on SiO 2 as photocatalysts respectively The results showed that the value of COD was below 200mg/L after the treatment process The effect of pH,anions such as CO 3 2- ,SO 3 2- ,PO 4 2- ,and SO 4 2- on the effciency of the photocatalytic degradation was discussed
1999 Vol. 16 (6): 354-356 [
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357
Clean Production of Sodium Diacetate
Li Wei Guo Cuilu Wang Yiping Zhang Jinli Yang Zhiyong
Sodum diacetae is a new type of food and feed additive with high efficient and nontoxic In the view of clean production, this paper studied the operation conditions of its preparation from sodium carbonate and acetic acid
1999 Vol. 16 (6): 357-360 [
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361
1999 Vol. 16 (6): 361-364 [
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365
1999 Vol. 16 (6): 365-366 [
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367
1999 Vol. 16 (6): 367-368 [
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369
1999 Vol. 16 (6): 369-371 [
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1391
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372
1999 Vol. 16 (6): 372-374 [
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375
1999 Vol. 16 (6): 375-375 [
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