电解还原法合成2-巯基乙醇的研究  

A Study on Preparing 2-Mercaptoethanol by Electrolysis Reduction

作　　者：张田林[1] 钱保华[1] 贾海红[1] 刘明[1] 

机构地区：[1]淮海工学院化学工程系,江苏连云港222005

出　　处：《淮海工学院学报（自然科学版）》2002年第2期33-36,共4页Journal of Huaihai Institute of Technology:Natural Sciences Edition

摘　　要：以二硫化钠和氯乙醇为主要原料 ,合成二硫代二甘醇 ,经电解还原制得 2 -巯基乙醇。探讨了合成反应条件和电解条件等因素对 2 -巯基乙醇收率的影响。实验结果表明 :二硫代二甘醇电解还原制备 2 -巯基乙醇的适宜工艺条件是二硫代二甘醇的起始质量浓度为 1 2 0 g/L,电解温度为 45℃ ,电流密度为 40 0～ 60 0 A/m2的阶段控制 ;2 -巯基乙醇的总收率为 84% ,纯度 98.3%。采用该法合成 2 -巯基乙醇具有原料转化率高、原料成本低、三废污染少等特点 ,工业应用价值前景广阔。Mercaptoethanol was prepared by the electrolysis reduction of dithiodiglycol synthesized with sodium disulfides and chloroethanols as raw materials. The effects of chemical and electrolysis conditions on the yield of 2\|mercaptoethanol were discussed. Experiments show that the optimal conditions for the preparation of 2\|mercaptoethanol are as follows: the initial quality concentration of dithiodiglycol 120 g/L, the electrolysis temperature 45 ℃ and the density of electrical current 400-600 A/m 2. The total yield rate is 84% with the purity rate of 98.3%. For its high raw material conversion rate, low cost and light degree of pollution, the preparing technology has a bright prospect for industrial production.

关 键 词：电解还原法 合成 2-巯基乙醇 二硫化钠 氯乙醇 硫醇 

分 类 号：O623.81[理学—有机化学]