Process for production of aromatic hydroxycarboxylic acid

Details Process for production of aromatic hydroxycarboxylic acid Process for production of aromatic hydroxycarboxylic acid

1989-01-18

1990-10-30

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562425, C07C 5115

Patent

active

049669923

ABSTRACT:
The present invention provides a method of production of aromatic hydroxycarboxylic acids by the reaction of alkaline metal salts of phenols or naphthols with carbon dioxide, in which free phenols or free naphthols produced as by-products in the reaction system are removed from the system so as to control the content of free phenols or free naphthols at a suitable level, by which a purer objective compound can be obtained at high yield under the condition of lower temperature and shorter time.

REFERENCES:
patent: 1725394 (1929-08-01), Dieterle
patent: 4287357 (1981-09-01), Mueller et al.
patent: 4345095 (1982-08-01), Mueller et al.

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