Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-10-11
1976-04-06
Weinberger, Lorraine A.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 5923
Patent
active
039489850
ABSTRACT:
Carboxymethyloxysuccinic acid is prepared by acidifying the calcium salt of carboxymethyloxysuccinic acid with sulfuric acid at a temperature of 40.degree.C to 80.degree.C; filtering off the CaSO.sub.4 .2H.sub.2 O by-product and concentrating the filtrate to give the purified acid. The calcium salt of carboxymethoxysuccinic acid is formed by reacting maleic acid and glycolic acid in aqueous media containing excess calcium hydroxide.
REFERENCES:
patent: 3586715 (1971-06-01), Smeets
patent: 3821296 (1974-06-01), Blumbergs et al.
patent: 3824279 (1974-07-01), Lamberti
patent: R28192 (1974-10-01), Schulz
Blumbergs John H.
Finley Joseph H.
McCarthy Michael J.
Polkowski John M.
FMC Corporation
Killos P. J.
Weinberger Lorraine A.
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