2-巯基苯并咪唑锌盐合成新工艺的研究  

Study on new synthesis process of 2-mercaptobenzimidazole zinc salt

作　　者：李合平 刘俊勇 杨瑞朝 常帅军 刘诗新 葛雪莹 LI He-ping;LIU Jun-yong;YANG Rui-chao;CHANG Shuai-jun;LIU Shi-xin;GE Xue-ying(Henan Provincial Research Center of Rubber Vulcanization Accelerator Engineering Technology,Hebi 458000,China;Henan Easy Joint New Materials Research Institute Co.,Ltd.,Hebi 458000,China)

机构地区：[1]河南省橡胶硫化促进剂工程技术研究中心,河南鹤壁458000 [2]河南易交联新材料研究院有限公司,河南鹤壁458000

出　　处：《现代化工》2023年第8期209-212,共4页Modern Chemical Industry

摘　　要：以邻苯二胺、二硫化碳为原料,在4-二甲氨基吡啶(DMAP)催化下合成了2-巯基苯并咪唑,然后加入氧化锌得到2-巯基苯并咪唑锌盐。考察了不同催化剂及其质量分数、反应介质、反应原料的摩尔比、成盐条件等对2-巯基苯并咪唑锌盐合成工艺的影响。结果表明,反应的最优工艺条件是:以水为反应介质,加入理论产量的1.0‰DMAP催化剂,反应原料n(邻苯二胺)∶n(二硫化碳)∶n(氧化锌)=1∶1.5∶0.52,成盐反应温度为125~130℃。相对于传统工艺,该工艺反应时间短、操作简单、三废少,适合工业化规模生产。2-Mercaptobenzimidazole is synthesized from 1,2-diaminobenzene and carbon disulfide under the catalysis of DMAP(4-dimethylaminopyridine),and reacts with zinc oxide to obtain 2-mercaptobenzimidazol zinc salt.The effects of the types and dosages of catalyst,the reaction medium,the molar ratio of raw materials and salt-forming conditions on the synthesis of 2-mercaptobenzimidazol zinc salt are investigated.The optimum conditions are obtained as follows:water as the reaction medium,the dosage of DMAP catalyst is 0.1%of theoretical yield,n(1,2-diaminobenzene)∶n(carbon disulfide)∶n(zinc oxide)=1∶1.5∶0.52,and salt-forming reaction temperature is in the range of 125-130℃.Compared with traditional process,this process needs short reaction time,operates easily,generates less wastes,and is suitable for industrial scale production.

关 键 词：邻苯二胺 2-巯基苯并咪唑 2-巯基苯并咪唑锌盐 DMAP 

分 类 号：O625.72[理学—有机化学]