Method for making organic polycarboxylic acids

Details Method for making organic polycarboxylic acids Method for making organic polycarboxylic acids

1976-10-04

1978-12-05

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

260307H, 260326R, 260326A, 26032626, 562474, 562432, 562429, 562460, 562463, 562469, C07C 6514

Patent

active

041285743

ABSTRACT:
A method is described for making organic polycarboxylic acids or anhydrides, such as aromatic ether bis(phthalic acid)s, based on a cyclic imide-cyclic anhydride exchange reaction at elevated temperatures in the presence of water. In addition to making organic polycarboxylic acid, organic imides are also generated.

REFERENCES:
patent: 4005134 (1977-01-01), Markezich

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