Process for releasing acidic organic compounds from salts thereo

Details Process for releasing acidic organic compounds from salts thereo Process for releasing acidic organic compounds from salts thereo

1995-01-11

1996-08-06

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562 8, 562 89, 562431, 562475, 562477, 562490, 562485, 562494, 562580, 562593, 562600, 562608, 568716, 568735, 568749, 568914, 568918, 568919, C07C 6336, C07C 2734, C07C 2974

Patent

active

055435645

ABSTRACT:
This invention embodies a process for releasing acidic organic compounds in high yield and good purity from aqueous solutions of their salts which comprises converting the salts by carbon dioxide to their corresponding free acidic organic compounds and metal hydrogen carbonates, removing the acidic organic compounds from the mixture by extraction with an essentially water-insoluble organic solvent, and re-extracting the organic phase with carbon dioxide containing water. Using this process, the acidic organic compounds are completely released from their corresponding salts, i.e., the organic solution is free of salt. The acidic organic compounds released by the claimed process are organic compounds which contain acidic protons which can be replaced by metals. Some examples are carboxylic acids, sulfonic acids, phosphonic acids, phenols, naphthols, and aliphatic alcohols.

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Agnew Chem. Int. Ed. 30, No. 12, pp. 1643-1644. (1991).
Abstract JP-A-55/00322. (1980).
Abstract JP-A-50/01099. (1975).

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