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1.发明授权Process for the recovery of lactic acid by contacting aqueous solutions containing the same with a basic organic extractant 失效通过使含有该乳酸的水溶液与碱性有机萃取剂接触来回收乳酸的方法公开(公告)号：US07019170B2
公开(公告)日：2006-03-28
申请号：US09284160
申请日：1997-10-02
摘要： The invention provides a process for the recovery of lactic acid and products thereof from an aqueous solution containing free lactic acid and at least one lactate salt at a total concentration of at least 5%, the process comprising the steps of: extracting at least 70% of the free lactic acid from the aqueous solution by contacting the solution with a basic extractant, to form a lactic acid-containing extract and a lactic acid-depleted, lactate salt-containing aqueous solution; separating the lactic acid-containing extract from the depleted aqueous solution; and stripping the extracted lactic acid from the extract by methods known per se, to form a solution of lactic acid and a stripped extractant.
摘要翻译： 本发明提供了一种从含有游离乳酸和至少一种乳酸盐的水溶液中回收乳酸及其产物的方法，其总浓度至少为5％，该方法包括以下步骤：提取至少70％ 的游离乳酸通过使溶液与碱性提取剂接触而形成含乳酸的提取物和不含乳酸的乳酸盐盐水溶液; 从耗尽的水溶液中分离含乳酸的提取物; 并通过本身已知的方法从提取物中提取出的乳酸，以形成乳酸和剥离的萃取剂溶液。
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2.发明授权
公开(公告)号：US06160173A
公开(公告)日：2000-12-12
申请号：US284108
申请日：1999-10-26
IPC分类号： C07C51/47 , C07C51/48 , C07C67/08 , C07C51/487 , C07C51/493
摘要： The invention provides a process for the recovery of purified lactic acid values from an aqueous feed solution containing lactic acid, lactic acid salt, or mixtures thereof, comprising: bringing the feed solution into contact with a substantially immiscible anion exchanger to form a substantially water-immiscible phase comprising an anion exchanger-lactic acid adduct; effecting a condensation reaction in the substantially water-immiscible phase between a carboxylic moiety of the lactic acid adduct and a moiety selected from a hydroxyl moiety and a primary or secondary amine moiety to respectively form a lactic acid ester or amine product; and separating the formed lactic acid product from the anion exchanger.
摘要翻译： PCT No.PCT / US97 / 17775 Sec。 371 1999年10月26日第 102（e）1999年10月26日PCT PCT 1997年10月2日PCT公布。 第WO98 / 15519号公报 日期：1998年04月16日本发明提供从含有乳酸，乳酸盐或其混合物的含水进料溶液中回收纯化乳酸值的方法，包括：使进料溶液与基本上不混溶的阴离子交换剂接触， 形成基本上与水不混溶的相，其包含阴离子交换 - 乳酸加合物; 在乳酸加合物的羧基部分和选自羟基部分和伯胺或仲胺部分的部分之间的基本上水不混溶的相中进行缩合反应，以分别形成乳酸酯或胺产物; 并将形成的乳酸产物与阴离子交换剂分离。
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公开(公告)号：US06320077B1
公开(公告)日：2001-11-20
申请号：US09132720
申请日：1998-08-12
申请人： Aharon M. Eyal , John N. Starr , Rod Fisher , Betty Hazan , Riki Canari , David R. Witzke , Patrick R. Gruber , Jeffrey J. Kolstad
发明人： Aharon M. Eyal , John N. Starr , Rod Fisher , Betty Hazan , Riki Canari , David R. Witzke , Patrick R. Gruber , Jeffrey J. Kolstad
IPC分类号： C07C5908
摘要： The techniques for processing lactic acid/lactate salt mixtures are provided. Preferred mixtures for processing are obtained from fermentation broths, preferably from fermentation processes conducted at a pH of 4.8 or lower. The techniques generally concern the provision of separated lactic acid and lactate streams, from the mixtures. Preferred techniques of separation and processing of each of the streams are provided.
摘要翻译： 提供了乳酸/乳酸盐混合物的加工技术。 优选的用于加工的混合物从发酵液中获得，优选在pH4.8或更低的条件下进行发酵。 这些技术通常涉及从混合物中提供分离的乳酸和乳酸盐流。 提供了每种流的分离和处理的优选技术。
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4.发明授权Continuous process for the manufacture of a purified lactide from esters of lactic acid 失效用于从乳酸的酯制造纯化的丙交酯的连续方法
公开(公告)号：US5247059A
公开(公告)日：1993-09-21
申请号：US935566
申请日：1992-08-24
申请人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwen , Richard D. Benson , Ronald L. Borchardt
发明人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwen , Richard D. Benson , Ronald L. Borchardt
摘要： 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.
摘要翻译： 一种从乳酸酯连续制备基本上纯化的丙交酯和丙交酯聚合物的方法，包括在催化剂存在下形成粗丙交酯的步骤，以形成缩合反应副产物和聚乳酸，并解聚聚乳酸分子 随后在蒸馏系统中随后纯化粗丙交酯。 然后将纯化的丙交酯聚合。
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公开(公告)号：US5585191A
公开(公告)日：1996-12-17
申请号：US527705
申请日：1995-09-13
申请人： Patrick R. Gruber , Jeffrey J. Kolstad , Christopher M. Ryan , Eric S. Hall , Robin S. Eichen Conn
发明人： Patrick R. Gruber , Jeffrey J. Kolstad , Christopher M. Ryan , Eric S. Hall , Robin S. Eichen Conn
IPC分类号： C08K3/16 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/88 , C08G63/90 , C08J5/18 , C08K3/22 , C08K3/26 , C08K3/30 , C08K3/34 , C08K5/10 , C08K5/13 , C08K5/1515 , C08K5/1575 , C08K5/29 , C08K5/51 , C08K5/524 , C08K5/54 , C08L67/00 , C08L67/04 , C08L101/00 , C08L101/16 , C09D167/04 , D01F6/62 , D04H1/42 , D21H19/28 , D21H19/62 , B32B27/36 , B32B9/04
CPC分类号： C08J5/18 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/90 , C08L67/04 , C09D167/04 , D01F6/625 , D04H1/42 , D21H19/28 , D21H19/62 , C08G2230/00 , C08J2367/04 , C08L101/00 , Y10T428/31504 , Y10T428/31786 , Y10T428/3179 , Y10T428/31808 , Y10T428/31819 , Y10T428/31993
摘要： An amorphous film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing an amorphous film with the lactide polymer composition is also disclosed.
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公开(公告)号：US5539081A
公开(公告)日：1996-07-23
申请号：US445775
申请日：1995-05-22
申请人： Patrick R. Gruber , Jeffrey J. Kolstad , Eric S. Hall , Robin S. Eichen Conn , Christopher M. Ryan
发明人： Patrick R. Gruber , Jeffrey J. Kolstad , Eric S. Hall , Robin S. Eichen Conn , Christopher M. Ryan
IPC分类号： C08K3/16 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/88 , C08G63/90 , C08J5/18 , C08K3/22 , C08K3/26 , C08K3/30 , C08K3/34 , C08K5/10 , C08K5/13 , C08K5/1515 , C08K5/1575 , C08K5/29 , C08K5/51 , C08K5/524 , C08K5/54 , C08L67/00 , C08L67/04 , C08L101/00 , C08L101/16 , C09D167/04 , D01F6/62 , D04H1/42 , D21H19/28 , D21H19/62
CPC分类号： C08J5/18 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/90 , C08L67/04 , C09D167/04 , D01F6/625 , D04H1/42 , D21H19/28 , D21H19/62 , C08G2230/00 , C08J2367/04 , C08L101/00 , Y10T428/31504 , Y10T428/31786 , Y10T428/3179 , Y10T428/31808 , Y10T428/31819 , Y10T428/31993
摘要： A lactide polymer composition combining compositional and purity limitations and catalyst optimization or addition of stabilizing agents resulting in a melt-stable polymer is disclosed. The melt-stable lactide polymer comprises a plurality of polylactide polymer chains, residual lactide in concentration of less than 2 percent and water in concentration of less than 1000 parts-per-million. A stabilizing agent in an amount sufficient to reduce depolymerization of the lactide polymer during melt-processing or alternatively, control of catalyst level at a molar ratio of monomer to catalyst greater than 3000:1 is also included in the melt-stable composition. A process for manufacture of a melt-stable lactide polymer composition includes polymerizing a lactide mixture and adding stabilizing agents sufficient to reduce depolymerization of the polylactide during melt-processing, followed by devolatilizing the polylactide to remove monomer and water.
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公开(公告)号：US5536807A
公开(公告)日：1996-07-16
申请号：US110394
申请日：1993-08-23
IPC分类号： C08K3/16 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/88 , C08G63/90 , C08J5/18 , C08K3/22 , C08K3/26 , C08K3/30 , C08K3/34 , C08K5/10 , C08K5/13 , C08K5/1515 , C08K5/1575 , C08K5/29 , C08K5/51 , C08K5/524 , C08K5/54 , C08L67/00 , C08L67/04 , C08L101/00 , C08L101/16 , C09D167/04 , D01F6/62 , D04H1/42 , D21H19/28 , D21H19/62 , B32B9/04 , B32B27/36
CPC分类号： C08J5/18 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/90 , C08L67/04 , C09D167/04 , D01F6/625 , D04H1/42 , D21H19/28 , D21H19/62 , C08G2230/00 , C08J2367/04 , C08L101/00 , Y10T428/31504 , Y10T428/31786 , Y10T428/3179 , Y10T428/31808 , Y10T428/31819 , Y10T428/31993
摘要： A semi-crystalline film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 5 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing a semi-crystalline film with the lactide polymer composition is also disclosed.
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8.发明授权Melt-stable amorphous lactide polymer film and process for manufacturing thereof 失效熔融稳定的无定形丙交酯聚合物膜及其制造方法
公开(公告)号：US5484881A
公开(公告)日：1996-01-16
申请号：US110424
申请日：1993-08-23
申请人： Patrick R. Gruber , Jeffrey J. Kolstad , Christopher M. Ryan , Eric S. Hall , Robin S. Eichen Conn
发明人： Patrick R. Gruber , Jeffrey J. Kolstad , Christopher M. Ryan , Eric S. Hall , Robin S. Eichen Conn
IPC分类号： C08K3/16 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/88 , C08G63/90 , C08J5/18 , C08K3/22 , C08K3/26 , C08K3/30 , C08K3/34 , C08K5/10 , C08K5/13 , C08K5/1515 , C08K5/1575 , C08K5/29 , C08K5/51 , C08K5/524 , C08K5/54 , C08L67/00 , C08L67/04 , C08L101/00 , C08L101/16 , C09D167/04 , D01F6/62 , D04H1/42 , D21H19/28 , D21H19/62 , B32B9/04 , B32B27/36
CPC分类号： C08J5/18 , A61L15/26 , A61L31/06 , C08G63/08 , C08G63/90 , C08L67/04 , C09D167/04 , D01F6/625 , D04H1/42 , D21H19/28 , D21H19/62 , C08G2230/00 , C08J2367/04 , C08L101/00 , Y10T428/31504 , Y10T428/31786 , Y10T428/3179 , Y10T428/31808 , Y10T428/31819 , Y10T428/31993
摘要： An amorphous film comprised of a lactide polymer. The lactide polymer comprises a plurality of poly(lactide) polymer chains, residual lactide in concentration of less than about 2 percent and water in concentration of less than about 2000 parts-per-million. A process for manufacturing an amorphous film with the lactide polymer composition is also disclosed.
摘要翻译： 由丙交酯聚合物构成的无定形膜。 丙交酯聚合物包含多个聚（丙交酯）聚合物链，浓度小于约2％的残余丙交酯和浓度小于约2000ppm的水。 还公开了用丙交酯聚合物组合物制造非晶膜的方法。
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公开(公告)号：US5247058A
公开(公告)日：1993-09-21
申请号：US927149
申请日：1992-08-07
申请人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwan , Richard D. Benson , Ronald L. Borchardt
发明人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwan , Richard D. Benson , Ronald L. Borchardt
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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10.发明授权Continuous process for manufacture of lactide polymers with controlled optical purity 失效用于制造具有受控光学纯度的丙交酯聚合物的连续方法
公开(公告)号：US5142023A
公开(公告)日：1992-08-25
申请号：US825059
申请日：1992-01-24
申请人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwen , Richard D. Benson , Ronald L. Borchardt
发明人： Patrick R. Gruber , Eric S. Hall , Jeffrey J. Kolstad , Matthew L. Iwen , Richard D. Benson , Ronald L. Borchardt
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.
摘要翻译： 从乳酸连续生产聚丙交酯聚合物的方法，该方法结合去除水或溶剂载体以将乳酸进料浓缩，然后聚合成低分子量预聚物。 将该预聚物加入反应器中，在该反应器中加入催化剂以促进产生丙交酯，即聚乳酸的解聚产物。 生成的丙交酯以其中除去水和其它杂质的液体或蒸气连续供入蒸馏系统。 将所得纯化液体丙交酯直接进料至聚合过程。
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