Process for making pure salicylic acid

Details Process for making pure salicylic acid Process for making pure salicylic acid

1978-04-07

1979-01-30

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 6510

Patent

active

041372581

ABSTRACT:
Alkali metal salicylate can be efficiently acidified and the salicylic acid product formed contemporaneously sublimed by contacting the salicylate as a solid with gaseous hydrogen chloride at the conditions specified. The temperature of the gaseous hydrogen chloride is controlled so that the heat required to sublime the salicylic acid product is predominantly supplied by the heat of reaction of the hydrogen chloride with the alkali metal salt of the carboxylic acid.

REFERENCES:
patent: 2891090 (1959-06-01), Campbell et al.
patent: 3337616 (1967-08-01), Kaeding
patent: 3359307 (1967-12-01), Poffenberger et al.
patent: 3530174 (1970-09-01), Gottesman
Chem. Ber., 9:1212-1213, (1976).

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