Process for the preparation of .beta.-hydroxybutyric acid esters
US5107016A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 2, 1990 |
| Grant date | Apr 21, 1992 |
| Priority date | — |
| Expiry date | Jan 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P7/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of .beta.-hydroxybutyric acid esters, comprising: PA1 1) a step involving alcoholysis of the polyhydroxybutyrate in the presence of an alcohol, a halogenated solvent, and an acid, PA1 2) a neutralization step comprising the addition of an alcoholate in solution in the alcohol, PA1 3) a purification step comprising the addition of a halogenated solvent and the azeotropic removal of water and the alcohol, PA1 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.