Method for the preparation of carboxymethyloxysuccinic acid

Details Method for the preparation of carboxymethyloxysuccinic acid Method for the preparation of carboxymethyloxysuccinic acid

1978-05-15

1981-01-06

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

562580, C07C 59235

Patent

active

042438209

ABSTRACT:
Carboxymethyloxysuccinic acid of improved purity may be prepared from its calcium salt by first precipitating the calcium as calcium carbonate by reaction with sodium carbonate, removing the calcium carbonate, acidifving the resulting solution of the sodium salt with sulfuric acid, extracting the free acid with a C.sub.4 or C.sub.5 alcohol or cyclohexanol and recovering the purified acid from the alcohol extracts.

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