Patent ID: 7342050
Filing Date: 2008-03-11
Classification: C07C

Abstract:
1. A process for the preparation of a lactic acid ester composition from a lactic acid composition, comprising: a) a stage of conversion, with removal of water, of said lactic acid composition into a lactic acid oligomeric composition exhibiting a mean degree of polymerization (MDP) of between 3 and 30, b) a subsequent stage of mixing and of reaction of said oligomeric composition which is purified or unpurified with an alcohol, in the presence of a transesterification catalyst, for the purpose of esterifying all or a portion of the lactic acid present, in a monomeric, dimeric, oligomeric or polymeric form, in said oligomeric composition, and c) an optional stage of purification of the lactic acid ester composition thus obtained.