Process for the production of aqueous solutions of sodium salts

Details Process for the production of aqueous solutions of sodium salts Process for the production of aqueous solutions of sodium salts

1982-02-10

1984-03-13

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548499, 548535, 562443, 562444, 562445, 562446, 562503, 562507, 562557, 562571, 562573, 562574, 562575, C07D21160, C07D20716

Patent

active

044369107

ABSTRACT:
Aqueous solutions of sodium salts of .alpha.-aminocarboxylic acids practically free of foreign salts are produced by saponifying the corresponding hydantoin at a temperature between 110.degree. C. and 180.degree. C. with a mixture, in each case based on the hydantoin, of 1 equivalent of sodium hydroxide and 2 equivalents of calcium oxide or hydroxide, separating off the precipitated calcium carbonate after the end of the saponification and concentrating the aqueous sodium salt solution remaining to drive off the ammonia contained therein.

REFERENCES:
patent: 3790599 (1974-02-01), Zundel
Chemical Abstracts, 92:22055y (1980) [Japan Kokai 79, 88, 217, Kondo et al., 7/13/79].

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