C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/324.3
C07D 207/28 (2006.01)
Patent
CA 1326036
ABSTRACT OF THE DISCLOSURE Alkali metal salts of 2-pyrrolidon-5-carboxylic acid (pyroglutamic acid) are produced by heating the corresponding alkali metal salt of the glutamic acid to a temperature in the range from its melting point to 250°C until the reaction water of the intramolecular condensation (cyclocondensation) has been completely driven off.
580239
Drauz Karlheinz
Krimmer Hans-Peter
Remmel Hans
Aktiengesellschaft Degussa
Marks & Clerk
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