Process for preparing glycine

Details Process for preparing glycine Process for preparing glycine

1991-02-01

1993-04-13

Prescott, Arthur C.

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

Organic compounds

Carboxylic acids and salts thereof

562550, C07C10106, C07C22908, C07C22712

Patent

active

052024792

ABSTRACT:
A process for preparing glycine which comprises the steps of reacting glycolonitrile, carbon dioxide gas, ammonia and water to obtain a reaction solution containing glycine, concentrating this reaction solution in two steps, recycling a gaseous phase portion formed in a primary concentration step to a reaction zone, and recycling to the reaction zone, a mother liquor left after glycine crystals have been separated from a concentrate obtained in a secondary concentration step.

REFERENCES:
patent: 3536726 (1970-10-01), Fink et al.
Patent Abstracts of Japan, unexamined applications, C field, vol. 14, No. 571, Dec. 19, 1990, pp. 141 C 790.
Patent Abstrats of Japan, unexamined applications, C section, vol. 2, No. 76, Jun. 16, 1978, p. 890 C 78.
Chemical Abstracts, 82, 171440r (1975); and JPA 49-127915, Dec. 7, 1974.
Chemical Abstracts, 89, 24804d (1978); and JPA 53-28116, Mar. 16, 1978.

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