Coproduction of aniline and diphenylamine

Details Coproduction of aniline and diphenylamine Coproduction of aniline and diphenylamine

1982-09-30

1983-09-13

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

C07C 8506

Patent

active

044043996

ABSTRACT:
A process for the coproduction of aniline and diphenylamine from phenol and ammonia is shown. An aniline reaction mixture containing ammonia and phenol is at least partially reacted to form aniline and that reaction mixture is distilled to separate a portion of the product aniline and the unreacted phenol therein. Aniline and phenol are then at least partially reacted to form diphenylamine. Product aniline and diphenylamine are recovered.
In the preferred embodiment the aniline formed in the aniline reaction is stripped of ammonia and water and distilled to form purified aniline and a crude bottoms product containing phenol and aniline. The latter stream is combined with the dried effluent from the diphenylamine reactor and, after distillation to separate crude diphenylamine, is recycled to the diphenylamine reactor.

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patent: 4017544 (1977-04-01), Mullins
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