Preparation of pure ammonium thioglycolate

Details Preparation of pure ammonium thioglycolate Preparation of pure ammonium thioglycolate

1993-09-10

1994-06-07

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5300

Patent

active

053191366

ABSTRACT:
A process is disclosed for the preparation of pure ammonium thioglycolate from thioglycolic acid contaminated with the isopropyl ester of thioglycolic acid wherein the contaminated acid is reacted with aqueous ammonia or ammonium hydroxide at a pH of at least 6.5 to about 9.0 at elevated temperature.

REFERENCES:
patent: 2405166 (1946-08-01), Reed et al.
patent: 3060166 (1962-10-01), Dinsmore et al.
patent: 3331743 (1967-07-01), Cook
patent: 3522295 (1970-07-01), Konstantinov
patent: 5023371 (1991-06-01), Tsui et al.
Austrian Patent No. 169,458 Leberl, Nov., 1951 (Chem. Abstr., vol. 46, 11597 c (1952).
Japanese 64-9918 Nozake et al., Jan. 1989 (Chem. Abstr., vol. 111, 102516a, 1993).

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