Method for production of maleimides

Details Method for production of maleimides Method for production of maleimides

1985-06-14

1986-11-18

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D207448

Patent

active

046237348

ABSTRACT:
A method for the production of maleimides, which comprises subjecting maleinamic acids to ring-closure imidation in an organic solvent capable of forming an azeotrope with water in the presence of an acid catalyst at a temperature in the range of 120.degree. to 250.degree. C. while removing the formed water in the form of an azeotrope with said organic solvent and thereafter purifying the produced maleimides.

REFERENCES:
patent: 2182178 (1939-12-01), Pinkernelle
patent: 2444536 (1948-07-01), Searle
patent: 2566992 (1951-09-01), Morgan et al.
patent: 2643258 (1953-06-01), Miller et al.

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