Process for preparing methylene diphenylamines by partial neutra

Details Process for preparing methylene diphenylamines by partial neutra Process for preparing methylene diphenylamines by partial neutra

1993-07-21

2000-02-29

Gorr, Rachel

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

Organic compounds

Amino nitrogen containing

25218221, C08G 1800

Patent

active

060311363

ABSTRACT:
Disclosed herein is a process for preparing a reaction product containing methylene diphenylamine, comprising reacting aniline and formaldehyde in the presence of an acid catalyst wherein the acid level of the resulting reaction mixture is reduced during digestion of the reaction mixture.

REFERENCES:
patent: 4259526 (1981-03-01), Dunlap et al.
patent: 4294987 (1981-10-01), Prather et al.
patent: 4465639 (1984-08-01), Hatfield, Jr.
patent: 4792624 (1988-12-01), Hatfield, Jr. et al.
patent: 5286760 (1994-02-01), Bolton

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