Chemical process

Details Chemical process Chemical process

1988-08-24

1990-02-27

Gray, Bruce D.

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

Organic compounds

Carboxylic acids and salts thereof

C07C 5922

Patent

active

049048244

ABSTRACT:
There is disclosed herein improved processes for the preparation of mixtures of alkali metal salts of 1-hydroxy-3-oxa-1,2,4,5-pentane tetracarboxylate and alkali metal salts of 3,6-dioxa-1,2,4,5,7,8-octane hexacarboxylate wherein by-product calcium carbonate produced by the process of making such mixtures is employed in a recycle pattern to prepare additional amounts of mixtures of said compounds.

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patent: 3692685 (1972-09-01), Lamberti et al.
patent: 3914297 (1975-10-01), Lamberti et al.
patent: 4663071 (1987-05-01), Bush et al.
patent: 4689167 (1987-08-01), Collins et al.
Chemical Abstracts, vol. 60, 2295G, 1964.
Chemical Abstracts, vol. 64, 4224G, 1966.

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