Process for industrial manufacture of sodium parahydroxymandelat

Details Process for industrial manufacture of sodium parahydroxymandelat Process for industrial manufacture of sodium parahydroxymandelat

1989-10-25

1990-12-18

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5948, C07C 5952

Patent

active

049787845

ABSTRACT:
This process is characterized by the fact that glyoxylic acid in aqueous solution is reacted with an excess of phenol in the presence of a tertiary amine, insoluble or slightly soluble in water and liquid at ambient temperature, in particular tributylamine or triisooctylamine, then the parahydroxymandelic acid thus obtained is salified with sodium hydroxide in aqueous solution.
The reaction of the glyoxylic acid with phenol is carried out at a temperature between 15.degree. C. and 80.degree. C.

REFERENCES:
patent: 4408070 (1983-10-01), Schouteeten et al.
Houben-Weyl Methoden Der Organischen Chemie, 4th edition, 1976, Georg Thieme Verlag, Stuttgart, p. 1036, paragraph 5, lines 1-3.

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