Process for the preparation of hydroxy-diphenylamines

Details Process for the preparation of hydroxy-diphenylamines Process for the preparation of hydroxy-diphenylamines

1979-11-05

1981-05-05

Doll, John

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

Organic compounds

Amino nitrogen containing

260456A, 260456P, 260465E, 560 19, 560139, 560141, 560142, 562433, C07C 8506, C07C12164, C07C13700, C07C10104

Patent

active

042658330

ABSTRACT:
A process for the preparation of hydroxy-diphenylamines by condensation of dihydroxybenzene with an excess amount of primary aromatic amine in the presence of a catalytic amount of an acid at elevated temperature is described wherein the excess aromatic amine and, if appropriate, the reaction product is distilled off from the reaction mixture in the presence of a base.

REFERENCES:
patent: 3450764 (1969-06-01), Altwicker

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