C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/324.3
C07D 207/28 (2006.01)
Patent
CA 2000184
A description is given of the new crystalline trihydrates of sodium-L- and -D-2-pyrrolidone-5-carboxylate. These trihydrates can be obtained by preparing an aqueous solution of sodium-L- or -D-2-pyrrolidone-5-carboxylate and matching the temperature and concentration to each other in such a way that the solubility of the respective trihydrate is exceeded.
Drauz Karlheinz
Krimmer Hans-Peter
Aktiengesellschaft Degussa
Marks & Clerk
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