Extraction of poly(.beta.-hydroxybutyric acid)
US4391766A · kind A · utility
15Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 1982 |
| Grant date | Jul 5, 1983 |
| Priority date | — |
| Expiry date | Feb 12, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12P7/625
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
.beta.-Hydroxybutyric acid polymers are extracted from micro-organism cells by contact with a solvent, such as 1,2-dichloroethane which is a poor solvent for the polymer once it has been precipitated. The solution obtained by extraction is caused to gel and then solvent is expelled by subjecting the gel to a deformation process. Expelled solvent is recovered for extraction of polymer from a further quantity of cells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.