硫脲法合成1,2-乙二硫醇的后处理工艺研究  

Study on After-Process of 1,2-ethanedithiol Synthesized by Thiourea

作　　者：章亚东[1] 邢军伟[1] 

机构地区：[1]郑州大学化工学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2009年第2期23-26,共4页Journal of Zhengzhou University（Engineering Science）

基　　金：河南省科技攻关计划资助项目(0523050300)

摘　　要：通过硫脲和S-烃基异硫脲盐在溶剂95%乙醇中溶解度的测定,确定了它们在最终反应液中的含量,减少了溶剂用量,省去了蒸馏回收乙醇的后处理操作步骤,使溶剂的循环利用率可达90%以上.根据Na2SO4和NaB r在水中溶解度的差异,通过旋转蒸发从反应液水相中分离出了Na2SO4和NaB r,Na2SO4的回收率可达95%以上.通过气质联用确定了油相的组成,采用减压蒸馏得到了纯度99%以上的产品,最终收率可达70%以上.釜液经过锌粉还原,得到了副产物二巯基二乙基硫醚.Amounts of thiourea and S-ethylene diisothiuronium bromide in reaction solution were determined by means of measurement of their solubility in 95% ethanol.Amount of solvent was reduced and distillation recovery of ethanol was saved.Cyclic utilization rate of solvent can reach 90%.Because of the difference of solubility in water,Na2SO4 and NaBr were separated from reaction solution respectively via rotary evaporation.The recovery rate of Na2SO4 is more than 95%.The composition of oil phase was determined by ...

关 键 词：1 2-乙二硫醇 硫脲 后处理 回收 

分 类 号：TQ227.1[化学工程—有机化工]