发明名称 |
Purification of glycolide. |
摘要 |
<p>A process for the purification of glycolide which comprises dissolving the glycolide to be purified in a suitable organic solvent, adding alumina to the resulting solution to form a slurry wherein the alumina is in intimate contact with the dissolved glycolide, stirring the slurry under controlled conditions for a period of 1 to 60 minutes, and filtering to remove the alumina and, if desired, evaporating to remove the solvent and recovering the purified glycolide; and the production of suture-grade polyglycolic acid by the polymerization of the resulting purified glycolide. </p> |
申请公布号 |
EP0238273(A2) |
申请公布日期 |
1987.09.23 |
申请号 |
EP19870302194 |
申请日期 |
1987.03.13 |
申请人 |
PFIZER HOSPITAL PRODUCTS GROUP, INC. |
发明人 |
RHUM, DAVID;MATTHEWS, RICHARD SAMUEL |
分类号 |
C07D319/12;C08G63/08;C08K3/22;C08L67/00;C08L67/04 |
主分类号 |
C07D319/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|