申请人:DHAWAN Rajiv
公开号:US20100160679A1
公开(公告)日:2010-06-24
Processes are provided for preparing complexes of 2,3,5,6-tetraaminotoluene with an aromatic diacid where the aromatic diacid is insoluble in water under ambient conditions. An integrated process design starting with nitration of 2,6-dihalotoluene 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.
提供了一种制备2,3,5,6-四氨基甲苯与芳香二酸络合物的工艺,其中芳香二酸在常温下不溶于水。从对2,6-二卤代甲苯的硝化开始的综合工艺设计,消除了昂贵的中间干燥和重结晶步骤。避免了固体材料可能具有致敏性和毒性的处理,从而消除了人类和环境的暴露。