发明名称 |
CONTINUOUS PROCESS FOR THE MANUFACTURE OF LACTIDE AND LACTIDE POLYMERS |
摘要 |
A process for the continuous production of substantially purified lactide and lactide polymers from lactic acid or an ester of lactic acid including the steps of forming crude polylactic acid, preferably in the presence of a catalyst means in the case of the ester of lactic acid, to form a condensation reaction by-product and polylactic acid, and depolymerizing the polylactic acid in a lactide reactor to form crude lactide, followed by subsequent purification of the crude lactide in a distillation system. A purified lactide is then polymerized to form lactide polymers.
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申请公布号 |
CA2173616(A1) |
申请公布日期 |
1995.04.13 |
申请号 |
CA19942173616 |
申请日期 |
1994.10.04 |
申请人 |
CARGILL, INCORPORATED |
发明人 |
GRUBER, PATRICK RICHARD;HALL, ERIC STANLEY;KOLSTAD, JEFFREY JOHN;IWEN, MATTHEW LEE;BENSON, RICHARD DOUGLAS;BORCHARDT, RONALD LEO |
分类号 |
C07D319/12;C08G63/06;C08G63/08;(IPC1-7):C08G63/08 |
主分类号 |
C07D319/12 |
代理机构 |
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