Method of producing carboxymethyloxysuccinic acid

Details Method of producing carboxymethyloxysuccinic acid Method of producing carboxymethyloxysuccinic acid

C - Chemistry, Metallurgy

07

C

260/522.2

C07C 55/22 (2006.01) C07C 51/00 (2006.01) C07C 51/367 (2006.01)

Patent

CA 1038884

ABSTRACT: Carboxymethyloxysuccinic acid is prepared by acidify- ing the calcium salt of carboxymethyloxysuccinic acid with sulfuric acid at a temperature of 40°C to 80°C; filtering off the CaSO4?2H2O by-product and concentrating the filtrate to give the purified acid. The calcium salt of carboxy- methyloxysuccinic acid is formed by reacting maleic acid and glycolic acid in aqueous media containing excess calcium hydroxide.

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