Preparation of maleamic acid

Details Preparation of maleamic acid Preparation of maleamic acid

1994-01-21

1995-03-21

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

C07C20500

Patent

active

053997506

ABSTRACT:
Maleamic acid (aminomaleic acid) is improvedly prepared by reacting gaseous ammonia with molten maleic anhydride under reactant contact conditions of high surface area, for example reacting said gaseous NH.sub.3 with a thin film of said molten maleic anhydride or with said molten maleic anhydride in a state of vigorous agitation.

REFERENCES:
patent: 2459964 (1949-01-01), Robinson et al.
patent: 3336384 (1967-08-01), Gee
patent: 4839461 (1989-06-01), Boehmke
Database WPI, Section Ch, Week 7438, Derwent Publications Ltd., London, GB; Class E10, AN 74-66969V (Nippon Shikubai Kagaku) (1974).
Database WPI, Section CH, Week 7335, Derwent Publications Ld., London, GB; Class E10, AN 73-49652U (Yu G Mamedaliev) (1973).
Chemical Abstracts, vol. 79, 1973, Columbus, Ohio, abstract No. 52751w, p. 319.

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