Purifying cyclic esters by aqueous solvent extraction and further purification
US5856523A · kind A · utility
6Cited by
48References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1997 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | Sep 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2367/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process is provided for the production and purification of cyclic esters in which the purification includes the introduction of an aqueous solvent into a cyclic ester containing composition and allowing two phases to form. A first phase includes cyclic esters and any organic solvent, and a second phase includes the aqueous solvent and impurities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.