Process for the preparation of 5-hydroxyisophtalic acids

Details Process for the preparation of 5-hydroxyisophtalic acids Process for the preparation of 5-hydroxyisophtalic acids

1996-03-26

1997-12-30

Barts, Samuel

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

Organic compounds

Carboxylic acids and salts thereof

C07C21300

Patent

active

057032742

ABSTRACT:
A process for the preparation of 5-hydroxyisophthalic acid (5-HIPA) that comprises hydrolyzing a starting material chosen from among 5-bromoisophthalic acid (5-BIPA), mixtures of 5-BIPA and dibromoisophthalic acid isomers, and salts of thereof in an aqueous alkaline solution, in the presence of a catalytically effective amount of a copper compound catalyst and in a temperature range of between 100.degree. and 270.degree. C.

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