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1. 发明申请

US20130324697A1 Method for the Manufacture of a Polyhydroxy-Carboxylic Acid 有权
标题翻译：多羟基羧酸的制造方法
公开(公告)号：US20130324697A1
公开(公告)日：2013-12-05
申请号：US13985770
申请日：2011-11-15
申请人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
发明人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
IPC分类号： C08G63/78
CPC分类号： C08G63/08 , B01D3/10 , B01D9/0013 , B01D9/0045 , B01D19/0036 , C07D319/12 , C08F124/00 , C08G63/78 , C08G63/785 , C08G63/90 , C08L67/04
摘要： Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities by means of a desublimation and a crystallization in the same crystallization apparatus.
摘要翻译：公开了一种制备聚乳酸的方法，其包括以下步骤：使用催化剂和催化剂杀菌化合物或封端添加剂进行开环聚合，得到MW大于10,000g / mol的原始聚乳酸，纯化原料聚乳酸通过将作为气相物流的低沸点化合物脱挥发分，从原料聚乳酸中除去和分离包含丙交酯和杂质的低沸点化合物，并从脱挥发分纯化丙交酯并从蒸发的低沸点气相物流中除去杂质化合物通过从气相中进行结晶化而得到，其中丙交酯被纯化，并且除去的杂质包括催化剂残余物和含有至少一个羟基的化合物，使得纯化的丙交酯通过将其送回到开环中而聚合聚合。本发明还涉及一种用于进行包括聚合反应器进行开环聚合以获得原始聚乳酸的方法的设备，用于从原始聚乳酸中分离包含丙交酯和杂质的低沸点化合物的脱挥发分装置和结晶用于纯化丙交酯并通过在相同的结晶装置中进行凝胶化和结晶去除杂质的装置。

2. 发明授权

US09637587B2 Method for the manufacture of a polyhydroxy-carboxylic acid 有权
公开(公告)号：US09637587B2
公开(公告)日：2017-05-02
申请号：US13985770
申请日：2011-11-15
申请人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
发明人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
IPC分类号： C08G63/08 , B01D9/00 , B01D19/00 , C07D319/12 , C08G63/90 , B01D3/10 , C08G63/78 , C08F124/00 , C08L67/04
CPC分类号： C08G63/08 , B01D3/10 , B01D9/0013 , B01D9/0045 , B01D19/0036 , C07D319/12 , C08F124/00 , C08G63/78 , C08G63/785 , C08G63/90 , C08L67/04
摘要： Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities by means of a desublimation and a crystallization in the same crystallization apparatus.

3. 发明申请

US20130331543A1 Method for the Manufacture of a Polyhydroxy-Carboxylic Acid 审中-公开
公开(公告)号：US20130331543A1
公开(公告)日：2013-12-12
申请号：US13985778
申请日：2011-11-15
申请人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
发明人： Manfred Stepanski , Francois Loviat , Andrzej Kuszlik
IPC分类号： C08G63/78
CPC分类号： C08G63/08 , B01D3/10 , B01D9/0013 , B01D9/0045 , B01D19/0036 , C07D319/12 , C08F124/00 , C08G63/78 , C08G63/785 , C08G63/90 , C08L67/04
摘要： Disclosed is a method to prepare a polylactic acid comprising the steps of: performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of condensing the evaporated gas phase stream to give a condensed stream and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising: a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for removing and separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities from a condensed stream, wherein a condenser for condensing a gas phase stream to give a condensed stream is arranged between the devolatization apparatus and the crystallization apparatus.

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