Process for the purification of crude 3,4,3',4'-tetraaminodiphen

Details Process for the purification of crude 3,4,3',4'-tetraaminodiphen Process for the purification of crude 3,4,3',4'-tetraaminodiphen

1982-03-22

1984-02-21

Hines, Robert V.

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

Organic compounds

Amino nitrogen containing

564407, 564437, C07C 8750

Patent

active

044331681

ABSTRACT:
Crude 3,4,3',4'-tetraaminodiphenyl (TAD) prepared by ammonolysis of 3,3'-dichlorobenzidine in the presence of mainly Cu catalysts is purified by a process in which

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Chem. Abstracts 1973, vol. 78, Ref. 147537Z.

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