Continuous process for the manufacture of a purified lactide from esters of lactic acid
US5247059A · kind A · utility
186Cited by
55References
58Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 24, 1992 |
| Grant date | Sep 21, 1993 |
| Priority date | — |
| Expiry date | Aug 24, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the continuous production of substantially purified lactide and lactide polymers from an ester of lactic acid including the steps of forming crude lactide in the presence of a catalyst means to form a condensation reaction by-product and polylactic acid and depolymerizing the polylactic acid molecules followed by subsequent purification of the crude lactide in a distillation system. A purified lactide is then polymerized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.