摘要
采用改进的苯胺硝基苯混合法代替传统的苯胺法合成2-巯基苯并噻唑(促进剂M),确定了最佳的合成条件:反应温度为240~260℃,反应时间为4h,产品收率大于80%.以活性氧化铝、二氧化硅和活性炭3种常见的固体吸附剂为催化剂,考察了固体吸附剂对合成反应的影响,催化效果明显:2-巯基苯并噻唑的收率由原来的80.6%提高到了85%以上,最高达到86.7%;反应时间由原来4h缩短为3h.
An improved process for the preparation of 2-mercaptobenzothiazole (accelerator M) by reacting aniline, nitrobenzene, and carbon disulfide was disclosed. The reaction was optimal conducted at 240 ℃ to 260℃ for 4 hours with the yield more than 80 percentage. Activated alumina, silica dioxide and activated carbon, which are three common solid adsorbents, were applied as catalyst, respectively. The yield of 2-mercaptobenzothiazole was improved from the original 80.6% to more than 85%, even up to 86.7%. And the reaction time had been shortened from the original 4 hours to 3 hours.
出处
《河北工业大学学报》
CAS
北大核心
2009年第3期29-32,共4页
Journal of Hebei University of Technology
关键词
2-巯基苯并噻唑
促进剂M
合成
活性氧化铝
二氧化硅
活性炭
2-mercaptobenzothiazole
accelerator M
synthesis
activated alumina
silica dioxide
activated carbon