电化学氧化苯酚合成对苯醌的研究

在H型阳离子交换膜电解槽中，以H2SO4电解质、阳极和阴极铅电极，研究苯酚电解氧化合成对苯醌．讨论电流密度、电解质浓度、电解液中对苯醌浓度和萃取剂等电解条件对对苯醌收率和电流效率的影响．经优选工艺条件为：电流密度4A·dm-2，H2SO4电解质浓度1mo1·L-1,氯仿萃取剂．通入3．2Ah电量，对苯醌收率可达68％．电流效率为24．7％．而在萃取剂存在下，对苯醌收率可提高至73％，电流效率为26％．实验结果表明氯仿萃取剂可循环套用．...

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Published in电化学 Vol. 19; no. 5; pp. 477 - 481
Main Author 钮东方 俞程凯 张新胜
Format Journal Article
LanguageChinese
Published 01.10.2013
Subjects
对苯醌
电解氧化
苯酚
萃取剂
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Abstract 在H型阳离子交换膜电解槽中，以H2SO4电解质、阳极和阴极铅电极，研究苯酚电解氧化合成对苯醌．讨论电流密度、电解质浓度、电解液中对苯醌浓度和萃取剂等电解条件对对苯醌收率和电流效率的影响．经优选工艺条件为：电流密度4A·dm-2，H2SO4电解质浓度1mo1·L-1,氯仿萃取剂．通入3．2Ah电量，对苯醌收率可达68％．电流效率为24．7％．而在萃取剂存在下，对苯醌收率可提高至73％，电流效率为26％．实验结果表明氯仿萃取剂可循环套用．
AbstractList 在H型阳离子交换膜电解槽中，以H2SO4电解质、阳极和阴极铅电极，研究苯酚电解氧化合成对苯醌．讨论电流密度、电解质浓度、电解液中对苯醌浓度和萃取剂等电解条件对对苯醌收率和电流效率的影响．经优选工艺条件为：电流密度4A·dm-2，H2SO4电解质浓度1mo1·L-1,氯仿萃取剂．通入3．2Ah电量，对苯醌收率可达68％．电流效率为24．7％．而在萃取剂存在下，对苯醌收率可提高至73％，电流效率为26％．实验结果表明氯仿萃取剂可循环套用．
Author 钮东方 俞程凯 张新胜
AuthorAffiliation 华东理工大学化学工程联合国家重点实验室,上海200237
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DocumentTitleAlternate Preparation of Benzoquinone from Phenol by Electrooxidation
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Notes 35-1172/06
NIU Dong-fang, YU Cheng-kai, ZHANG Xin-sheng＊ （State Key Laboratory of Chemical Engineering, East China University of Seienee and Technology, Shanghai 200237, China）
phenol; beznoquinone; electrochemical oxidation; extractant
The benzoquinone was prepared from phenol by electrooxidation in an H-type cell with cation exchange membrane, in which lead plates were used both as an anode and a cathode, while H2504 was used as a supporting electrolyte. The effects of current density, concentration of sulphuric acid, concentrations of benzoquinone in electrolyte and extractant on the yields and efficiencies of electrolysis were investigated. Under the optimized conditions of current density being 4 A. dm-2, concentration of sulphuric acid 1 mol .L-1, passed charge 3.2 Ah, the yield and current efficiency of benzoquinone could reach 68% and 24.7%, respectively, without using chloroform as an extractant. However, the yield and current efficiency of benzoquinone could be increased to 73% and 26%, respectively, i
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StartPage 477
SubjectTerms 对苯醌
电解氧化
苯酚
萃取剂
Title 电化学氧化苯酚合成对苯醌的研究
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