Process for the preparation of 4,4'-diaminodiphenyl-methane and

Details Process for the preparation of 4,4'-diaminodiphenyl-methane and Process for the preparation of 4,4'-diaminodiphenyl-methane and

1990-10-11

1993-08-31

Raymond, Richard L.

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

Organic compounds

Amino nitrogen containing

560 48, C07C21149

Patent

active

052411192

ABSTRACT:
Process for the preparation of 4,4'-diaminodiphenylmethane and its derivatives.
4,4'-diaminodiphenylmethane and its derivatives are prepared by the condensation of aniline, or its derivative, and aldehyde, or its precursor and/or isomerization of appropriate intermediate products. The reaction proceeds with zeolites acting as catalysts; these catalysts, which are selected in accordance with the reaction to be effected, are preferably zeolites based on Si, Al and B; Si, Al and Ti; Ti and Fe; ZSM-5; or Y zeolites.

REFERENCES:
patent: 3496239 (1970-02-01), Hamilton et al.
patent: 3728408 (1973-04-01), Tobias
patent: 4011278 (1977-03-01), Plank et al.
patent: 4039580 (1977-08-01), Frulla et al.
patent: 4052456 (1977-10-01), Marquis et al.
patent: 4071558 (1978-01-01), Bentley
patent: 4162358 (1979-07-01), Marquis et al.
patent: 4294987 (1981-10-01), Prather et al.

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