发明授权
US3842098A Production of 2-mercaptobenzimidazole by reacting o-phenylene diamine and carbon disulfide
失效
通过反应O-苯乙烯二胺和碳氢化合物生产2-甲基苯并咪唑
- 专利标题： Production of 2-mercaptobenzimidazole by reacting o-phenylene diamine and carbon disulfide
- 专利标题（中）： 通过反应O-苯乙烯二胺和碳氢化合物生产2-甲基苯并咪唑
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申请号： US32311873申请日： 1973-01-12
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公开(公告)号： US3842098A公开(公告)日： 1974-10-15
- 发明人: SCHERHAG B , WOLZ H , FRANCQUE M
- 申请人： BAYER AG
- 专利权人： Bayer Ag
- 当前专利权人： Bayer Ag
- 优先权： DE2202204 1972-01-18
- 主分类号： C07D235/28
- IPC分类号： C07D235/28 ; C07D49/38
摘要：
1. A PROCESS FOR PRODUCING HIGH PURITY 2-MERCAPTOBENZIMIDAZOLE WHICH COMPRISES REACTING O-PHENYLENE DIAMIE WITH CARBON DISULFIDE IN BENZOTHIAZOLE OR IN ALKYLBENZOTHIAZOLE HAVING FROM 1 TO 4 CARBON ATOMS IN THE ALKYL MOIETY, EXTRACTING RESULTING 2-MERCAPTOBENZIMIDAZOLE CONTAINING SOLUTION WIWITH DILUTE AQUEOUS ALKALI METAL HYDROXIDE SOLUTION, PRECIPITATING EXTRACTED 2-MERCAPTOBENZIMIDTHIAZOLE FROM RESULTING AQUEOUS ALKALI METAL HYDROXIDE SOLUTION CONTAINING THE SAME BY ACIDIFICATION AND RECOVERING PRECIPITATED 2-MERCAPTOBENZIMIDAZOLE.
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