发明授权
US4462937A Process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes 失效
从相应的三氯或三溴甲基苯制备三氟甲基苯的方法

Process for the preparation of trifluoromethylbenzenes from the
corresponding trichloro- or tribromo-methylbenzenes
摘要:
This invention relates to a continuous process for the preparation of trifluoromethylbenzenes from the corresponding trichloro- or tribromo-methylbenzenes with hydrofluoric acid. The process is characterized by passing an ascending stream of gaseous hydrofluoric acid, countercurrently through a plurality of mobile successive liquid layers of the trichloro- or tribromo-methylbenzenes.
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