发明申请
- 专利标题: INTEGRATED PROCESS FOR THE PREPARATION OF POLYBENZIMIDAZOLE PRECURSORS
- 专利标题(中): 用于制备聚苯并咪唑前体的一体化方法
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申请号: US12634734申请日: 2009-12-10
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公开(公告)号: US20100160685A1公开(公告)日: 2010-06-24
- 发明人: JOACHIM C. RITTER , Rajiv Dhawan
- 申请人: JOACHIM C. RITTER , Rajiv Dhawan
- 申请人地址: US DE Wilmington
- 专利权人: E. I. DU PONT DE NEMOURS AND COMPANY
- 当前专利权人: E. I. DU PONT DE NEMOURS AND COMPANY
- 当前专利权人地址: US DE Wilmington
- 主分类号: C07C209/38
- IPC分类号: C07C209/38
摘要:
An integrated process is provided for preparing 2,3,5,6-tetraminotoluene and salts thereof starting with nitration of 2,6-dihalotoluene. The process design eliminates costly intermediate drying and recrystallization steps. Handling of solid materials with possible skin sensitizing properties and toxicity is avoided, thereby eliminating human and environmental exposure.
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