申请人:RITTER JOACHIM C.
公开号:US20100160695A1
公开(公告)日:2010-06-24
An improved process is provided for the preparation of 2,6-dihalo-3,5-dinitrotoluene by the nitration of 2,6-dihalotoluene. The direct isolation of highly pure 2,6-dihalo-3,5-dinitrotoluene is accomplished without a water or ice quench, by providing at least one equivalent of SO
3
during the reaction, slow crystallization, and isolation of product from a cold crystal slurry.
提供了一种改进的方法,用于通过对2,6-二卤代甲苯进行硝化反应制备2,6-二卤-3,5-二硝基甲苯。通过在反应过程中提供至少一个SO3当量,在冷晶体淤泥中缓慢结晶并从中分离产物,实现了高纯度的2,6-二卤-3,5-二硝基甲苯的直接分离,而不需要水或冰淬。