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A new process for preparation of 4,4'-dihydroxydiphenylsulfone

ZHANG Tianyong1,5,ZHU Jiayou1,LI Bin1,2,4,JIANG Shuang1,CHEN Song1,5,WANG Shuhua3,5   

  1. 1 School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;2 Tianjin Key Laboratory of Applied Catalysis Science and Engineering,Tianjin 300072,China;3 Kemai Chemical Co. Ltd.,Tianjin 300270,China;4 State Key Laboratory of Fine Chemicals,Dalian University of Technology,Dalian 116024,Liaoning,China;5Tianjin Enterprise Key Laboratory of Green Rubber Auxiliary,Tianjin 300270,China
  • Online:2013-11-05 Published:2013-11-05

4,4'-二羟基二苯砜合成新工艺的研究

张天永1,5,朱佳佑1,李 彬1,2,4,姜 爽1,陈 松1,5,王树华3,5   

  1. 1天津大学化工学院,天津 300072;2天津市应用催化科学与工程重点实验室,天津 300072;3科迈化工股份有限公司,天津 300270;4大连理工大学精细化工国家重点实验室,辽宁 大连 116024;5天津市绿色橡胶助剂企业重点实验室(筹),天津 300270

Abstract: A new process for synthesis of 4,4'-dihydroxydiphenylsulfone (BPS) by the sulfonation of phenol with concentration sulfuric acid followed by dehydration was developed. A new catalyst (naphthalene-2,6-disulfonic acid) and solvent system (mixed solvent of mesitylene-durene) were adopted to improve the yield and purity of BPS. The effects of type of solvent,weight ratio of mixed solvent,type and amount of catalyst on BPS yield,purity and isomer (2,4'-dihydroxydiphenylsulfone) ratio were investigated. The new process was as follow:To the reaction mixture of 100g mixed solvent of mesitylene-durene (the weight ratio 3∶1),5 g catalyst of naphthalene-2,6-disulfonic acid and 98.5 g phenol 51.2 g sulfuric acid was added dropwisely at 110 ℃. Then the reaction system was heated rapidly to the reflux temperature of 172 ℃ and maintained for 5h. The yield of product BPS reached 99.3% and the purity was 96.49%. The product yield of the process was high and the catalyst was relatively cheap,and the new process was easy to be commercialized.

Key words: 4,4'-dihydroxydiphenylsulfone, mesitylene, durene, naphthalene-2,6-disulfonic acid

摘要: 对苯酚磺化、脱水法合成4,4'-二羟基二苯砜(BPS)工艺进行改进。研究了使用新的催化剂(2,6-萘二磺酸)和溶剂(均三甲苯-均四甲苯混合溶剂),提高经苯酚和浓硫酸合成BPS的收率和纯度。详细研究了合成过程中所用溶剂类型及混合溶剂比例、催化剂种类及用量对BPS收率、纯度及异构体2,4'-二羟基二苯砜变化规律的影响。较好的工艺条件为:100 g均三甲苯-均四甲苯混合溶剂(二者质量比3∶1),5 g 2,6-萘二磺酸催化剂,98.5 g苯酚,在110 ℃将51.2 g硫酸滴加完成后,将反应液快速升温至回流温度172 ℃并保持5 h。BPS产品收率可达99.3%,纯度为96.49%。该方法收率高,催化剂便宜,易于工业化。

关键词: 4, 4'-二羟基二苯砜, 均三甲苯, 均四甲苯, 2, 6-萘二磺酸

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