发明名称 Integrated process for the preparation of polybenzimidazole precursors
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.
申请公布号 US8404898(B2) 申请公布日期 2013.03.26
申请号 US20090634734 申请日期 2009.12.10
申请人 RITTER JOACHIM C.;DHAWAN RAJIV;E I DU PONT DE NEMOURS AND COMPANY 发明人 RITTER JOACHIM C.;DHAWAN RAJIV
分类号 C07C209/38 主分类号 C07C209/38
代理机构 代理人
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