Purification of 2-mercaptobenzothiazole by solvent extraction

被引：4

作者：

Prakorn Ramakul

Milan Hronec

Ura Pancharoen

机构：

[1] Department of Chemical Engineering,

[2] Faculty of Engineering,undefined

[3] Chulalongkorn University,undefined

[4] Patumwun,undefined

[5] Department of Organic Technology,undefined

[6] Faculty of Chemical and Food Technology,undefined

[7] Slovak University of Technology,undefined

来源：

Korean Journal of Chemical Engineering | 2007年 / 24卷

关键词：

Toluene; Aniline; Solvent Extraction; Nitrobenzene; High Pressure Liquid Chromatography;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

−Purification of 2-mercaptobenzothiazole (91.9% purity) by solvent extraction was studied. The extraction of impurities present in crude 2-MBT (e.g. benzothiazole, sulfides and sulfur containing compounds) was carried out at temperatures between 70-180°C using various solvents and their mixtures of different polarity. The highest purity of 2-MBT, above 99% was obtained using nitrobenzene, toluene and ethanol, even at a concentration of 2-MBT above 50 wt%. Increasing temperature and decreasing concentration of the raw material have a positive influence on the purification process. A comparable efficiency of purification was observed also with mixed solvents, (toluene with ethanol, acetone and aniline) possessing the same polarities. A correlation between the polarity indexes (PI) of mixed solvents and experimentally obtained purity of 2-MBT was found. The highest purity of 2-MBT provides extraction of the raw material with mixed solvents having PI 3.8-4.4.

引用

页码：282 / 287

页数：5