Process for producing aromatic hydroxycarboxylic acids

Details Process for producing aromatic hydroxycarboxylic acids Process for producing aromatic hydroxycarboxylic acids

2007-09-18

2007-09-18

McKane, Joseph (Department: 1621)

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

Organic compounds

Carboxylic acids and salts thereof

C562S406000

Reexamination Certificate

active

11270716

ABSTRACT:
There is provided a process for producing an aromatic hydroxycarboxylic acid which is capable of suppressing the formation of by-products and enhancing the selectivity of the intended product and is free from any purifying step. The process is characterized in that it is obtained by reacting an alkali metal salt of an aromatic hydroxy compound and carbon dioxide in a non-proton polar solvent in the presence of a solid basic catalyst.

REFERENCES:
patent: 4260802 (1981-04-01), Hallgren
patent: 4376867 (1983-03-01), Jansen et al.

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