Plural Ring Oxygens In The Lactone Ring Patents (Class 549/274)
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Publication number: 20130281296Abstract: Compounds and methods that release 1-methylcyclopropene, 1-trifluoromethylcyclopropene, and other substituted cyclopropenes are disclosed. The compounds and methods overcome present limitations for storage, transportation, and application of the cyclopropene containing compounds by using light, including sunlight, and/or heat as the primary release trigger. Additional products released include innocuous gases and value added aryl-group compounds.Type: ApplicationFiled: June 4, 2013Publication date: October 24, 2013Inventors: Cheryl D. Stevenson, John Perrin Davis
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Publication number: 20130267716Abstract: The present invention provides a method of preparing lactide with a high yield from lactate obtained through a fermentation process. In certain embodiments, the invention provides a method of preparing high-purity lactide with a high yield, wherein the method comprises treating lactate with a specific solvent, using a catalyst, and phase-separating the resultant. In accordance with the invention, costs for manufacturing polylactic acid can be considerably reduced.Type: ApplicationFiled: August 31, 2012Publication date: October 10, 2013Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Si Hwan Kim, Jiyoun Seo, Do Suck Han
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Patent number: 8552209Abstract: Lactic acid equivalents are recovered from a starting lactide stream by catalytically racemizing a portion of the lactide in the stream at a temperature of 180° C. or below. This increases the proportion of two species of lactide (i.e., at least two of S,S-, R,R- or meso-lactide) at the expense of the third species. The racemized mixture so obtained can be separated to recover some or all of one or more of the lactide species from the remaining lactide species, by a process such as melt crystallization or distillation. Impurities in the starting lactide stream usually are retained mostly in the remaining meso-lactide, so a highly purified S,S- and/or R,R-lactide stream can be produced in this manner. Such a purified S,S- and R,R-lactide stream is suitable for polymerization to form a polylactide.Type: GrantFiled: March 12, 2010Date of Patent: October 8, 2013Assignee: NatureWorks LLCInventors: Richard Douglas Benson, Joseph D. Schroeder
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Publication number: 20130261316Abstract: In one aspect, the invention relates to compounds having the formula: where R1-R6, a, b, Z, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. These compounds have neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising such compounds; methods of using such compounds; and processes and intermediates for preparing such compounds.Type: ApplicationFiled: June 3, 2013Publication date: October 3, 2013Applicant: THERAVANCE, INC.Inventors: Melissa Fleury, Roland Gendron, Adam D. Hughes
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Publication number: 20130225787Abstract: A process for the preparation of lactic acid includes: a) providing an aqueous medium comprising magnesium lactate; b) adding to the aqueous medium a monovalent base to form an aqueous medium comprising a water soluble monovalent lactate salt and a solid magnesium base; c) separating the magnesium base from the aqueous medium; d) adjusting the concentration of the monovalent lactate salt in the aqueous medium, e) subjecting the aqueous medium to water-splitting electrodialysis, to produce a first solution comprising monovalent base and a second solution comprising lactic acid and monovalent lactate salt, the electrodialysis being carried out to a partial conversion of 40 to 98 mole %; f) separating the second solution into lactic acid and a solution comprising the monovalent lactate salt by vapour-liquid separation; g) recycling the solution of step f) comprising the monovalent lactate salt to step d).Type: ApplicationFiled: February 8, 2011Publication date: August 29, 2013Applicant: Purac Biochem BVInventors: Peter Johannes Marie Baets, Willem Jacob Groot
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Publication number: 20130209392Abstract: The present invention provides cyclic dimers of alpha acids and polymers derived therefrom. Also provided are processes for preparing and methods of using the cyclic dimers and the polymers derived from the cyclic dimers.Type: ApplicationFiled: February 8, 2013Publication date: August 15, 2013Applicant: NOVUS INTERNATIONAL INC.Inventor: Novus International Inc.
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Publication number: 20130197183Abstract: A process for the production of a complex of lactic acid and either ammonia or an amine, comprising reacting one or more saccharides with barium hydroxide to produce a first reaction mixture comprising barium lactate, and contacting at least part of the first reaction mixture with ammonia or an amine and with carbon dioxide, or with the carbonate and/or bicarbonate salt of ammonia or an amine, to produce a second reaction mixture comprising said complex and barium carbonate.Type: ApplicationFiled: October 17, 2011Publication date: August 1, 2013Applicant: Plaxica LimitedInventor: Edward Leslie Marshall
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Publication number: 20130116448Abstract: Process for the manufacture of a cyclic diester of an alpha-hydroxyacid comprising heating the alpha-hydroxyacid at a temperature from 100 to 250° C. in the presence of at least one polyol and of at least one catalyst selected from the group consisting carboxylates and alkoxides of Ti, Zr, Al and Sn.Type: ApplicationFiled: July 8, 2011Publication date: May 9, 2013Applicant: SOLVAY SAInventors: Henri Georges Ghislain Wautier, Dominique Francois Achille Marchand
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Patent number: 8431725Abstract: A method for the purification or recovery of lactide rich streams by the combination of a suspension-based melt crystallization process with a subsequent separation of the pure lactide crystals in a wash column is disclosed.Type: GrantFiled: August 28, 2007Date of Patent: April 30, 2013Assignee: Niro Process Technology B.V.Inventors: Reinhard Uwe Scholz, Robertus Petrus Maria van der Steen
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Patent number: 8431678Abstract: Method for the production of L,L-, D,D-, D,L- and meso-dilactides, comprising the polycondensation and/or polytransesterification of an L-, D- or D,L-lactic acid or of esters thereof to polyesters of higher molecular weights of the L-, D- and D,L-lactic acid (polylactic acids) and cyclizing depolymerization of the polylactic acids to dilactides, wherein the polyesters of higher molecular weights of the L-, D- and D,L-lactic acids are produced in the presence of hydrolysis-stable metal compounds as catalyst.Type: GrantFiled: November 14, 2008Date of Patent: April 30, 2013Assignee: Jungbunzlauer Austria AGInventors: Gerald Rafler, Jutta Rafler, Andreas Windsperger, Robert Edlauer, Josef Gass
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Patent number: 8430948Abstract: The present invention relates to a condensation and washing device with which in particular the process vapors which occur during the production of polylactide can be processed and cleaned. Furthermore, the present invention relates to a polymerization device for the production of polylactide and also to a method for processing process vapors which occur during the production of polylactide; possibilities for use of both the condensation and washing devices and of the method are likewise mentioned.Type: GrantFiled: August 5, 2008Date of Patent: April 30, 2013Assignee: Uhde Inventa-Fischer GmbHInventors: Rainer Hagen, Udo Muhlbauer
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Patent number: 8426615Abstract: The present invention relates to a method of obtaining lactide by means of a solvent of the ether class from a mixture that is in liquid form comprising lactide, meso-lactide, and other impurities.Type: GrantFiled: August 13, 2009Date of Patent: April 23, 2013Assignee: Futerro S.A.Inventors: Pierre-Antoine Mariage, Delphine Hottois, Philippe Coszach
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Patent number: 8404868Abstract: A method of purifying a cyclic ester, comprising: mixing a co-distillated liquid comprising a cyclic ester produced by heating depolymerization of a hydroxycarboxylic acid oligomer in the presence of a depolymerization solvent and the depolymerization solvent with an organic solvent for washing which is mutually soluble with the depolymerization solvent and has a lower boiling point than the cyclic ester; subjecting the resultant mixture liquid to liquid-liquid separation into an organic solvent phase containing the depolymerization solvent and a cyclic ester phase containing the organic solvent; and then evaporating the organic solvent from the cyclic ester phase containing the organic solvent to recover the cyclic ester containing a reduced amount of the depolymerization solvent.Type: GrantFiled: January 28, 2008Date of Patent: March 26, 2013Assignee: Kureha CorporationInventors: Kazuyuki Yamane, Tomohiro Hoshi, Tomoyuki Ogawa
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Patent number: 8399686Abstract: Disclosed herein are process for preparing cyclic esters comprising unsaturated functional groups. Also disclosed are copolymers prepared from the cyclic esters. The copolymers can be used to form microparticles, polymer micelles, etc., which are useful in drug delivery applications.Type: GrantFiled: December 15, 2010Date of Patent: March 19, 2013Assignee: Evonik Degussa CorporationInventors: Peter Markland, Xi Zhang
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Publication number: 20130060051Abstract: A process for the synthesis of 100% optically pure L(+)-lactide catalyzed by zinc and tin metal catalysts of less than 150 micron particle size is disclosed. The L-lactide obtained was further purified to obtain lactide of 100% optical purity and acid impurities less than 10 meq/kg.Type: ApplicationFiled: August 27, 2012Publication date: March 7, 2013Inventors: Bhaskar Bhairavnath Idage, Susheela Bhaskar Idage, Sivaram Swaminathan
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Patent number: 8383835Abstract: Process for the synthesis of a cyclic diester of an alpha-hydroxyacid, comprising the following steps: an alkalino-earth salt of the corresponding alpha-hydroxyacid is mixed with said alpha-hydroxyacid and water; the mixture is treated by evaporation-crystallization, so that a hydrate of the alkalino-earth salt of the linear dimer of the corresponding alpha-hydroxyacid precipitates; the hydrated salt is dehydrated to give the corresponding anhydrous salt; and the anhydrous salt is pyrolyzed, releasing the cyclic diester of the corresponding alpha-hydroxyacid and leaving the alkalino-earth hydroxide as solid residue.Type: GrantFiled: December 23, 2008Date of Patent: February 26, 2013Assignee: Ktanton Ltd.Inventors: Samuel J. Wajc, Henri Wautier
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Patent number: 8362282Abstract: The present invention relates to a method for storing and/or transporting intramolecular cyclic esters (lactones), in particular lactide.Type: GrantFiled: August 12, 2009Date of Patent: January 29, 2013Assignee: Uhde Inventa-Fischer GmbHInventors: Rainer Hagen, Udo Muhlbauer
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Publication number: 20130023674Abstract: Methods and systems are disclosed for producing lactide, which can be used for PLA production or other valuable bioproducts. PLA is heated to undergo thermal depolymerization to recover lactide. The lactide can be used for PLA production or other valuable bioproducts.Type: ApplicationFiled: March 15, 2012Publication date: January 24, 2013Inventors: Ramani Narayan, Wei-Min Wu, Craig S. Criddle
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Publication number: 20120316230Abstract: The present invention relates to compounds of formula (I), where R1 and R2, which may be identical or different, are selected from the group comprising H, CnH2n-1, a linear or branched alkyl group having 1 to 6 carbons, or together form an aromatic or aliphatic ring with 5 or 6 atoms; R3 is —CO—CH3, —NHOH, —OH, or —OR6 where R6 is a linear or branched alkyl group having 1 to 6 carbon atoms; R4 is H, linear or branched alkyl group having from 1 to 6 atoms, phenyl, benzyl, —CF3 or CF2CF3, vinyl or allyl; R5, R7, R8 are hydrogen atoms; or R3 and R4, R4 and R5, or R7 and R8 together form a ring, fused to the benzene, aromatic or aliphatic ring with 5 or 6 atoms comprising from 1 to 2 heteroatoms selected independently from the group comprising N, O, and use thereof in the medical field.Type: ApplicationFiled: February 15, 2012Publication date: December 13, 2012Inventors: Giancarlo Naccari, Sergio Baroni
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Publication number: 20120315681Abstract: The patent application relates to a method of producing a monomer component from a genetically modified polyhydroxyalkanoate (PHA) biomass, wherein the biomass is heated in the presence of a catalyst to release a monomer component from the PHA.Type: ApplicationFiled: February 11, 2011Publication date: December 13, 2012Inventors: Johan van Walsem, Erik Anderson, John Licata, Kevin A. Sparks, Christopher Mirley, M.S. Sivasubramanian
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Publication number: 20120302724Abstract: The present invention provides a method of producing D-type lactide from liquid D-type lactic acid, and a method for producing D-type polylactic acid having a weight average molecular weight of about 50,000˜20,000 g/mol from the produced D-type lactide. The method of the present invention is advantageous in that D-type lactide can be obtained at a high yield by a simple method, compared to the conventional production methods. Consequently, production cost of D-type polylactic acid that is finally obtained from D-type lactide can be reduced.Type: ApplicationFiled: July 13, 2011Publication date: November 29, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Si Hwan Kim, Ji Youn Seo, Do Suck Han
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Publication number: 20120289713Abstract: A method for producing glycolide, including the steps of: heating a mixture containing a glycolic acid oligomer, a high-boiling point polar organic solvent having a boiling point of 230 to 450° C., and a tin compound under normal pressure or reduced pressure until a temperature at which the glycolic acid oligomer is depolymerized, to thereby dissolve the glycolic acid oligomer in the high-boiling point polar organic solvent; heating a solution, in which the glycolic acid oligomer is dissolved, under normal pressure or reduced pressure until a temperature at which the glycolic acid oligomer is depolymerized, to thereby form glycolide by depolymerization of the glycolic acid oligomer in the solution; and co-distilling off the high-boiling point polar organic solvent and the formed glycolide from a depolymerization reaction system.Type: ApplicationFiled: December 16, 2010Publication date: November 15, 2012Applicant: KUREHA CORPORATIONInventors: Shigeru Suzuki, Kazuyuki Yamane, Masaru Kagoshima, Michio Kikuchi
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Publication number: 20120245321Abstract: Disclosed is a method for manufacturing D-lactide from liquid D-lactic acid and a method for manufacturing D-polylactic acid with a weight-average molecular weight 50,000-20,000 g/mol from the prepared D-lactide. The disclosed method is advantageous in that D-lactide can be prepared in high yield through a relatively simple process as compared to the existing method. Thus, the cost for producing D-polylactic acid from the D-lactide can be reduced.Type: ApplicationFiled: May 19, 2011Publication date: September 27, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Do Suck Han
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Publication number: 20120245322Abstract: Disclosed is a method for manufacturing D-lactide from liquid D-lactic acid and a method for manufacturing D-polylactic acid with a weight-average molecular weight 50,000-20,000 g/mol from the prepared D-lactide. The disclosed method is advantageous in that D-lactide can be prepared in high yield through a relatively simple process as compared to the existing method. Thus, the cost for producing D-polylactic acid from the D-lactide can be reduced.Type: ApplicationFiled: November 30, 2011Publication date: September 27, 2012Applicant: HYUNDAI MOTOR COMPANYInventors: Chae Hwan Hong, Do Suck Han
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Patent number: 8258317Abstract: The present disclosure discloses a catalyst for directly producing a lactide which is a cyclic ester used as a monomer for polylactides, and a method for directly producing a lactide using the catalyst, the method including the transesterification reaction between two molecules of an ester of lactic acid or a mixture containing the ester of lactic acid with a small amount of lactic acid and oligomer of lactic acid under an inert environment in the presence of a titanium-based catalyst or a catalyst mixture containing the titanium-based catalyst so as to produce lactide while simultaneously removing an alcohol (ROH) generated as a by-product.Type: GrantFiled: September 21, 2009Date of Patent: September 4, 2012Assignee: Korea Research Institute of Chemical TechnologyInventors: Jong-San Chang, Young-Kyu Hwang, Jung-Ho Lee, Jong-Min Lee, Min-Hee Jung
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Publication number: 20120213806Abstract: In one aspect, the invention relates to compounds having the formula: where R1-R6, a, b, Z, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. These compounds have neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising such compounds; methods of using such compounds; and processes and intermediates for preparing such compounds.Type: ApplicationFiled: February 16, 2012Publication date: August 23, 2012Applicant: THERAVANCE, INC.Inventors: Melissa Fleury, Roland Gendron, Adam D. Hughes
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Publication number: 20120213807Abstract: In one aspect, the invention relates to compounds having the formula: where R1, R2a, R2b, R3-R6, a, b, Z, and X are as defined in the specification, or a pharmaceutically acceptable salt thereof. These compounds have neprilysin inhibition activity. In another aspect, the invention relates to pharmaceutical compositions comprising such compounds; methods of using such compounds; and processes and intermediates for preparing such compounds.Type: ApplicationFiled: February 16, 2012Publication date: August 23, 2012Applicant: THERAVANCE, INC.Inventors: Melissa Fleury, Roland Gendron, Adam D. Hughes, Cameron Smith
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Publication number: 20120165554Abstract: The present invention relates to a method for the stereospecific chemical recycling of a mixture of polymers based on polylactic acid PLA, in order to reform the monomer thereof or one of the derivatives thereof. The latter may enter the traditional lactate market or once again serve as a raw material for synthesising PLA.Type: ApplicationFiled: July 19, 2010Publication date: June 28, 2012Applicant: GALACTIC S.A.Inventors: Philippe Coszach, Jonathan Willocq
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Patent number: 8203008Abstract: The present invention is directed to stable lactide particles, more specifically lactide particles which are stable enough to be stored and transported at room temperature and have a quality high enough for use as starting material for polylactic acid. The lactide particles have a surface/volume ratio of the particle is lower than 3000. Preferably the lactide in the particle has an optical purity of at least 95%. The lactide particles are prepared by subjecting lactide to a shaping step comprising extrusion, pastillation, prilling, tabletting, or flaking.Type: GrantFiled: February 17, 2010Date of Patent: June 19, 2012Assignee: Purac Biochem B.V.Inventor: Sicco De Vos
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Publication number: 20120149920Abstract: A mixture of cyclic diesters derived from lactic acid and in cases a mixture of a racemate of dilactide may be produced in several different processes. In some instances, the process can thereby start from the corresponding alpha-hydroxycarboxylic acids, the corresponding cyclic diesters or oligomers of the corresponding alpha-hydroxycarboxylic acids.Type: ApplicationFiled: August 28, 2009Publication date: June 14, 2012Inventors: Rainer Hagen, Adam Bastiaan Verweij, Udo Muhlbauer, Joachim Schulze, Wolfgang Tietz, Klaus-Dieter Göhler, Olga Renate Göhler
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Publication number: 20120142945Abstract: A method for recovery of highly pure alkyl lactate and lactic acid is provided, which includes a step 1 for producing source liquid comprising lactic acid or ammonium lactate; a step 2 for dehydrating the source liquid product of step 1; a step 3 for producing liquid mixture by sequentially adding and stirring alcohol and acid solution to the dehydrated source liquid; a step 4 for separating and removing ammonium salt precipitation from the liquid mixture of step 3; a step 5 for producing alkyl lactate from ammonium salt-free liquid mixture by esterification reaction; and a step 6 for separating alcohol and alkyl lactate by distillation from the mixture of step 5.Type: ApplicationFiled: December 2, 2011Publication date: June 7, 2012Applicant: KOREA RESEARCH INSTITUTE OF CHEMICAL TECHNOLOGYInventors: Dong Won HWANG, Jong-San CHANG, Young Kyu HWANG, U-Hwang LEE, HyoJin GWAK
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Patent number: 8193112Abstract: The present disclosure relates to cationic divalent metal catalysts useful for the polymerization of cyclic esters, methods for their preparation and uses thereof.Type: GrantFiled: November 24, 2009Date of Patent: June 5, 2012Assignee: University of LethbridgeInventors: Paul G. Hayes, Craig Wheaton
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Publication number: 20120123120Abstract: Phenyliodonium ylide derivatives substituted with electron donating as well as electron withdrawing groups on the aromatic ring are shown for use as precursors in aromatic nucleophilic substitution reactions. The iodonium ylide group is substituted by nucleophiles such as halide ions to provide the corresponding haloaryl derivatives. No-carrier-added [F-18]fluoride ion exclusively substitutes the iodonium ylide moiety in these derivatives and provides high specific activity F-18 labeled fluoro derivatives. Protected L-dopa-6-iodonium ylide derivative have been synthesized as a precursors for the preparation of no-carrier-added 6-[F-18]fluoro-L-dopa. The iodonium ylide group in this L-dopa.derivative is nucleophilically substituted by no-carrier-added [F-18]fluoride ion to provide a [F-18]fluoro intermediates which upon acid hydrolysis yielded 6-[F-18]fluoro-L-dopa.Type: ApplicationFiled: April 1, 2010Publication date: May 17, 2012Applicant: The Regents of the University of CaliforniaInventors: Nagichettiar Satyamurthy, Jorge R. Barrio
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Publication number: 20120116100Abstract: An object of the present invention is to provide a method and a system by which hydroxycarboxylic acid cyclic dimers are efficiently generated, allowing high yields of high-quality polyhydroxycarboxylic acid to be obtained. The method for synthesizing polyhydroxycarboxylic acid comprises a depolymerization step for depolymerizing hydroxycarboxylic acid oligomers to produce hydroxycarboxylic acid cyclic dimers, wherein, in the depolymerization step, a reaction solution is heated via heat transfer from a heat medium passage under reduced pressure while the reaction solution is being flowing through a horizontally provided reaction solution passage.Type: ApplicationFiled: November 2, 2011Publication date: May 10, 2012Inventors: Masayuki KAMIKAWA, Toshiaki Matsuo, Naruyasu Okamoto, Kenichiro Oka, Takeyuki Kondo, Akira Tomura, Kazutaka Suzuki
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Publication number: 20120095240Abstract: Lactic acid equivalents are recovered from a starting lactide stream by catalytically racemizing a portion of the lactide in the stream at a temperature of 180° C. or below. This increases the proportion of two species of lactide (i.e., at least two of S,S-, R,R- or meso-lactide) at the expense of the third species. The racemized mixture so obtained can be separated to recover some or all of one or more of the lactide species from the remaining lactide species, by a process such as melt crystallization or distillation. Impurities in the starting lactide stream usually are retained mostly in the remaining meso-lactide, so a highly purified S,S- and/or R,R-lactide stream can be produced in this manner. Such a purified S,S- and R,R-lactide stream is suitable for polymerization to form a polylactide.Type: ApplicationFiled: March 12, 2010Publication date: April 19, 2012Inventors: Richard Douglas Benson, Joseph D. Schroeder
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Patent number: 8097736Abstract: The present invention is directed to a method for the manufacture of stable lactide particles, more specifically lactide particles which are stable enough to be stored and transported at room temperature and have a quality high enough for use as starting material for polylactic acid. The lactide particles are obtained via a flaking process, comprising the contacting of a continuous flow of molten lactide with a surface on which the lactide solidifies and subsequently is removed from said surface.Type: GrantFiled: November 28, 2007Date of Patent: January 17, 2012Assignee: Purac Biochem B.V.Inventor: Sicco De Vos
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Publication number: 20120004324Abstract: Disclosed herein are process for preparing cyclic esters comprising unsaturated functional groups. Also disclosed are copolymers prepared from the cyclic esters. The copolymers can be used to form microparticles, polymer micelles, etc., which are useful in drug delivery applications.Type: ApplicationFiled: December 15, 2010Publication date: January 5, 2012Inventors: Peter Markland, Xi Zhang
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Publication number: 20110288312Abstract: The present invention relates to a method for storing and/or transporting intramolecular cyclic esters (lactones), in particular lactide.Type: ApplicationFiled: August 12, 2009Publication date: November 24, 2011Applicant: Uhde Inventa-Fischer GmbHInventors: Rainer Hagen, Udo Mublbauer
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Patent number: 8053584Abstract: The present case relates to a process for the purification of lactide from a crude lactide vapor product stream which process comprises a rectification/condensation step leading to a lactide-enriched condensate.Type: GrantFiled: December 10, 2003Date of Patent: November 8, 2011Assignee: Tate & Lyle Public Limited CompanyInventors: Johannes Meerdink, Nils Dan Anders Sädergard
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Publication number: 20110263811Abstract: Lactic acid is obtained by a method including (A) a step of continuous fermentation wherein a fermentation culture medium of a microorganism having an ability of lactic acid fermentation is filtered through a porous membrane having an average pore size of not less than 0.01 ?m and less than 1 ?m with a transmembrane pressure difference within the range of 0.1 to 20 kPa, and the permeate is collected, while retaining the non-permeated liquid in or returning the non-permeated liquid to the culture, and adding a fermentation feedstock to the culture; (B) a step of filtering the permeate obtained in Step (A) through a nanofiltration membrane; and (C) a step of distilling the permeate obtained in Step (B) under a pressure of not less than 1 Pa and not more than atmospheric pressure, at 25° C. to 200° C. to recover lactic acid.Type: ApplicationFiled: December 25, 2009Publication date: October 27, 2011Applicant: TORAY INDUSTRIES, INC.Inventors: Kenji Sawai, Hideki Sawai, Takashi Mimitsuka, Ito Masateru, Katsushige Yamada, Kenji Kawamura, Shin-ichi Minegishi, Izumi Nakagawa, Tatsuya Nagano
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Publication number: 20110263875Abstract: The invention provides a production process of glycolide comprising the respective steps of: Step 1 of heating a mixture containing a glycolic acid oligomer and a high boiling polar organic under normal or reduced pressure to reflux the mixture and at that time, conducting a total reflux operation in a reflux time within a range of 0.1 to 20 hours under conditions that substantially the whole amount of a distillate distilled out of a reflux system containing the mixture is refluxed into the reflux system; Step 2 of heating the mixture after the total reflux operation or a mixture obtained by adding the high boiling polar organic solvent to a glycolic acid oligomer component recovered from the mixture after the total reflux operation to conduct depolymerization; and Step 3 of collecting glycolide from a co-distillate.Type: ApplicationFiled: December 9, 2009Publication date: October 27, 2011Applicant: KUREHA CORPORATIONInventors: Shigeru Suzuki, Kazuyuki Yamane, Toshihiko Ono, Kazuhiko Sunagawa
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Publication number: 20110232178Abstract: Compounds and methods that release 1-methylcyclopropene, 1-trifluoromethylcyclopropene, and other substituted cyclopropenes are disclosed. The compounds and methods overcome present limitations for storage, transportation, and application of the cyclopropene containing compounds by using light, including sunlight, and/or heat as the primary release trigger. Additional products released include innocuous gases and value added aryl-group compounds.Type: ApplicationFiled: March 23, 2011Publication date: September 29, 2011Inventors: John Perrin Davis, Cheryl D. Stevenson
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Publication number: 20110220843Abstract: A polymer film comprising at least one compound represented by formula (I) is disclosed. A1 and A2 each independently represent a group having a Hammett's ?p value of 0.2 or more, or bond each other to form a cyclic active methylene structure; and X1 and X2 each independently represent a hydrogen atom, aryl group, hetero-cyclic group, cyano, N-alkyl- or N-aryl-carbamoyl, or alkyl- or aryl-oxycarbonyl, or bond each other to form a saturated ring in which nitrogen and carbon atoms are embedded, and the group and ring may have at least one substituent.Type: ApplicationFiled: March 11, 2011Publication date: September 15, 2011Applicant: FUJIFILM CorporationInventors: Shunya Katoh, Hiroko Kamee
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Publication number: 20110190512Abstract: The present invention relates to a method of obtaining lactide by means of a solvent of the ether class from a mixture that is in liquid form comprising lactide, meso-lactide, and other impurities.Type: ApplicationFiled: August 13, 2009Publication date: August 4, 2011Applicant: Futerro S.A.Inventors: Pierre-Antoine Mariage, Delphine Hottois, Philippe Coszach
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Publication number: 20110098438Abstract: An object of the present invention is to provide a production process of an ?-hydroxy acid having a sufficient quality as a polymer raw material, which process does not produce a large amount of waste as a byproduct and is economical. The present invention provides a production process of an ?-hydroxy acid having a step of adding a basic metal to an ?-hydroxy acid ammonium salt to yield an ?-hydroxy acid metal salt and a step of desalting the ?-hydroxy acid metal salt to yield the ?-hydroxy acid.Type: ApplicationFiled: June 20, 2008Publication date: April 28, 2011Inventor: Makoto Okamoto
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Patent number: 7928251Abstract: The present invention relates to a process for preparing tetramethylglycolide by heating a composition which comprises at least 50% by weight of 2-hydroxy-isobutyric acid and/or tetramethylglycolide to a temperature of at least 100° C.Type: GrantFiled: August 30, 2007Date of Patent: April 19, 2011Assignee: Evonik Roehm GmbHInventors: Bernd Vogel, Alexander May, Hermann Siegert
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Patent number: 7888518Abstract: A preparation method of a dye incorporated in a recording layer for a high density optical recording medium, having the following general chemical structural formula (I): is provided.Type: GrantFiled: June 1, 2009Date of Patent: February 15, 2011Assignee: Industrial Technology Research InstituteInventors: Ming-Chia Lee, Chien-Liang Huang, Wen-Yih Liao, Ching-Yu Hsieh, Tzuan-Ren Jeng, An-Tse Lee
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Publication number: 20100331512Abstract: Method for the production of L,L-, D,D-, D,L- and meso-dilactides, comprising the polycondensation and/or polytransesterification of an L-, D- or D,L-lactic acid or of esters thereof to polyesters of higher molecular weights of the L-, D- and D,L-lactic acid (polylactic acids) and cyclizing depolymerization of the polylactic acids to dilactides, wherein the polyesters of higher molecular weights of the L-, D- and D,L-lactic acids are produced in the presence of hydrolysis-stable metal compounds as catalyst.Type: ApplicationFiled: November 14, 2008Publication date: December 30, 2010Applicant: JUNGBUNZLAUER AUSTRIA AGInventors: Gerald Rafler, Jutta Rafler, Andreas Windsperger, Robert Edlauer, Josef Gass
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Publication number: 20100267970Abstract: Process for the synthesis of a cyclic diester of an alpha-hydroxyacid, comprising the following steps: an alkalino-earth salt of the corresponding alpha-hydroxyacid is mixed with said alpha-hydroxyacid and water; the mixture is treated by evaporation-crystallization, so that a hydrate of the alkalino-earth salt of the linear dimer of the corresponding alpha-hydroxyacid precipitates; the hydrated salt is dehydrated to give the corresponding anhydrous salt; and the anhydrous salt is pyrolyzed, releasing the cyclic diester of the corresponding alpha-hydroxyacid and leaving the alkalino-earth hydroxide as solid residue.Type: ApplicationFiled: December 23, 2008Publication date: October 21, 2010Applicant: KTANTON LTD.Inventors: Samuel J. Wajc, Henri Wautier
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Patent number: 7815950Abstract: Ketomethionine ketals and hemiketals and derivatives thereof are useful as feed additives, in particular for the nutrition of ruminants.Type: GrantFiled: November 20, 2007Date of Patent: October 19, 2010Assignee: Evonik Degussa GmbHInventors: Christoph Kobler, Martin Hateley, Philipp Roth, Barbara Jaeger, Rainer Peter, Christoph Weckbecker, Klaus Huthmacher