Patent ID: 6455733
Filing Date: 2002-09-24
Classification: C07C

Abstract:
A process for recovering sorbic acid from a sorbic acid-containing waste liquid produced in a sorbic acid production process by at least solvent extraction, which comprises extracting sorbic acid from the waste liquid using an organic solvent which is separable from water and has a solubility in water of not more than 1 % by weight and in which not less than 0.5% by weight of sorbic acid is dissolvable, wherein the organic solvent is at least one member selected from the group consisting of alcohols having 6 or more carbon atoms, aliphatic or alicyclic C6-11 ketones, organic acid C6-16 alkyl esters, organic acid cycloalkyl esters, and aliphatic or aromatic C5-10 ethers.