Method for the purification of 4,4'-diamino-diphenylmethane

Details Method for the purification of 4,4'-diamino-diphenylmethane Method for the purification of 4,4'-diamino-diphenylmethane

1993-05-28

1994-05-17

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

C07C20984

Patent

active

053129890

ABSTRACT:
A method of purifying 4,4'-diaminodiphenylmethane comprising partially melting a crystal of crude 4,4'-diaminodiphenylmethane and removing a melt to obtain a high purity 4,4'-diaminodiphenylmethane. By utilizing the method, a high purity 4,4'-diaminodiphenylmethane is obtained efficiently with a low level of energy consumption.

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