发明授权
US06277951B1 Continuous process for manufacture of lactide polymers with controlled optical purity
有权
用于制造具有受控光学纯度的丙交酯聚合物的连续方法
- 专利标题： Continuous process for manufacture of lactide polymers with controlled optical purity
- 专利标题（中）： 用于制造具有受控光学纯度的丙交酯聚合物的连续方法
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申请号： US09351653申请日： 1999-07-13
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公开(公告)号： US06277951B1公开(公告)日： 2001-08-21
- 发明人: Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
- 申请人： Patrick Richard Gruber , Eric Stanley Hall , Jeffrey John Kolstad , Matthew Lee Iwen , Richard Douglas Benson , Ronald Leo Borchardt
- 主分类号： C08G6308
- IPC分类号： C08G6308
摘要：
A process for the continuous production of polylactide polymers from lactic acid which incorporates removal of water or a solvent carrier to concentrate the lactic acid feed followed by polymerization to a low-molecular-weight prepolymer. This prepolymer is fed to a reactor in which a catalyst is added to facilitate generation of lactide, the depolymerization product of polylactic acid. The lactide generated is continuously fed to a distillation system as a liquid or vapor wherein water and other impurities are removed. The resultant purified liquid lactide is fed directly to a polymerization process.
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