| 摘要 |
Process for the preparation of beta -hydroxybutyric acid esters, comprising: 1) a step involving alcoholysis of the polyhydroxybutyrate in the presence of an alcohol, a halogenated solvent, and an acid, 2) a neutralization step comprising the addition of an alcoholate in solution in the alcohol, 3) a purification step comprising the addition of a halogenated solvent and the azeotropic removal of water and the alcohol, 4) a step for recovery of the ester, comprising a filtration, a distillation of the halogenated solvent and a distillation of the ester. This process enables beta -hydroxybutyric acid esters of high purity to be obtained.
|
