Process for precipitation of carboxyalkoxy succinate tetrahydrat

Details Process for precipitation of carboxyalkoxy succinate tetrahydrat Process for precipitation of carboxyalkoxy succinate tetrahydrat

1977-02-03

1979-01-30

Killos, Paul J.

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

Organic compounds

Carboxylic acids and salts thereof

26050117, C07C 5923

Patent

active

041372603

ABSTRACT:
It is disclosed that water soluble carboxyalkoxy succinate tetrahydrate salt can be precipitated in high purity from alcohol-water solvent systems when operating at temperatures from about 50.degree. C to about 100.degree. C using seed crystals of either tetrahydrate or pentahydrate form or a mixture thereof. Useful temperatures are from about 45.degree. to about 75.degree. C. Preferred temperatures are above about 55.degree. C up to about 65.degree. C where tetrahydrate product is obtainable even where pentahydrate seed is used.

REFERENCES:
patent: 3965169 (1976-06-01), Stahlweber
patent: 4014929 (1977-03-01), Stahlheber
patent: 4014930 (1977-03-01), Feiler et al.

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