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| Number | Title | Issue Date |
| 8097736 | Stable lactide particles 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 fo... | 01/17/2012 |
| 8053584 | Purification process for lactide 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. ... | 11/08/2011 |
| 7928251 | Process for preparing tetramethyl glycolide 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. ... | 04/19/2011 |
| 7812181 | Process for producing glycolide and glycolic acid oligomer for production of glycolide Glycolide production through depolymerization of glycolic acid oligomer is stabilized by controlling impurities in the glycolic acid oligomer to allow economical and effective production of glycolide. More specifically, the depolymerization system is controlled to s... | 10/12/2010 |
| 7781600 | Process for purifying hydroxycarboxylic acid, process for producing cyclic ester, and process for producing polyhydroxycarboxylic acid Disclosed is a process for purifying a hydroxycarboxylic acid, comprising: a crystallization step of subjecting a hydroxycarboxylic acid aqueous solution to crystallization for purification, a separation step of separating a hydroxycarboxylic acid crystal from a mot... | 08/24/2010 |
| 7582777 | Long chain (C22-C50) polyunsaturated hydrocarbons, derivatives, synthesis and uses thereof The present invention is directed to unsaturated or derivatized long chain (C22-C50) polyunsaturated hydrocarbons and a method of preparing the long chain hydrocarbons via electrocoupling of C12-C26 fatty acids. It has bee... | 09/01/2009 |
| 7557224 | Method for recovering lactide from polylactic acid or derivative thereof To provide an efficient method for recovering and producing lactide having high optical purity by depolymerizing a polylactic acid or derivative thereof in order to carry out chemical recycling of the polylactic acid or derivative thereof or of a resin composition c... | 07/07/2009 |
| 7504524 | Method for synthesis of 2,5-dioxane-1,4-diones The invention relates to a novel method for the synthesis of 2,5-dioxane-1,4-diones having formula (I), comprising the oxidation of the ketone function of a cyclic compound having formula (II), wherein R1, R2, R3 and R4 in... | 03/17/2009 |
| 7442809 | Method for producing 1,3-dioxolan-4,6-dione compound A method for producing a 1,3-dioxan-4,6-dione compound from a ketone compound and a malonic acid, the method comprising: precipitating a 1,3-dioxan-4,6-dione compound as a crystal from a mixed solvent comprising a first organic solvent having a dielectric constant o... | 10/28/2008 |
| 7361727 | Copolymerization of 1,4-dioxan-2-one and a cyclic ester monomer producing thermal stabilized 1,4-dioxan-2-one (co)polymers A polymerization process to derive a thermal-stabilized poly(1,4-dioxan-2-one) and cyclic ester monomer copolymer using a coordination-insertion catalyst/initiator. 1,4-dioxan-2-one and cyclic ester monomer, each containing less than 100-ppm water and having an acid... | 04/22/2008 |
| 7342050 | Method for preparing a lactic acid ester composition and use thereof as solvent The invention concerns a method for preparing a lactic acid ester composition based on a lactic acid composition involving a step of transforming the composition into a lactic acid oligomeric composition having a mean degree of polymerisation (DPM) ranging between 2... | 03/11/2008 |
| 7238461 | Optical information-recording medium, novel oxonol compound and method of recording information An optical information-recording medium which contains a dye having at least two chromophores bonded to each other without any conjugated bond intervening between those chromophores. ... | 07/03/2007 |
| 7235673 | Glycolide production process, and glycolic acid oligomer for glycolide production The invention relates to a glycolide production process wherein a depolymerization reaction system comprising a glycolic acid oligomer or a glycolic acid oligomer and a polar organic solvent is heated to depolymerize the glycolic acid oligomer into glycolide, the re... | 06/26/2007 |
| 7230144 | Methods of making intermediates from polyhydroxyalkanoates Methods of forming intermediates from PHAs are disclosed. ... | 06/12/2007 |
| 7211693 | Preparation of lactic acid derivatives and their use The present invention relates to preparing lactic acid derivatives that are useful as odorants and monomers for polymer synthesis. ... | 05/01/2007 |
| 7183422 | Oxonol compound and process for producing the compound A compound represented by the formula (I) defined herein and a compound represented by the formula (II) defined herein, and a process for producing the compound represented by the formula (I) which comprises reacting the compound represented by the formula (III) def... | 02/27/2007 |
| 7173141 | Chiral lactones Lactones represented by the formula 2a or 2b: are provided, where each Ph is, independently, an unsubstituted or substituted phenyl group. These lactones are suitable for the synthesis of various α... | 02/06/2007 |
| 7166743 | Methods of making intermediates from polyhydroxyalkanoates Methods of forming acrylic acid by heating a PHA are disclosed. The PHA can be derived from a biomass of a non-fossil source. The PHA can be, for example, poly 3-hydroxypropionate or a 3-hydroxypropionate containing polymer. The methods can include, for example, hea... | 01/23/2007 |
| 7157429 | Method of regulating glucose metabolism, and reagents related thereto The present invention provides methods and compositions for modification and regulation of glucose and lipid metabolism, generally to reduce insulin resistance, hyperglycemia, hyperinsulinemia, obesity, hyperlipidemia, hyperlipoproteinemia (such as chylomicrons, VLD... | 01/02/2007 |
| 7101912 | Carbidopa prodrugs and derivatives, and compositions and uses thereof Prodrugs of carbidopa, derivatives of carbidopa prodrugs, methods of making prodrugs of carbidopa and derivatives thereof, methods of using prodrugs of carbidopa and derivatives thereof, and compositions of prodrugs of carbidopa and derivatives thereof are disclosed... | 09/05/2006 |
| 7078381 | Method of regulating glucose metabolism, and reagents related thereto The present invention provides methods and compositions for modifying glucose metabolism and treating Type II diabetes in an animal, along with modifying metabolism of a peptide hormone in an animal. Compositions disclosed herein comprise one or more peptides and/or... | 07/18/2006 |
| 7067611 | Polyhydroxycarboxylic acid and its production process Polyhydroxycarhoxylic acids are provided, which are controlled in terms of the rate of biodegradability, and give molded or otherwise formed articles that are of uniform quality with neither premature strength drop nor premature deterioration of retention of outside... | 06/27/2006 |
| 6984293 | Azeotropic distillation of cyclic esters of hydroxy organic acids Cyclic esters of hydroxy organic acids can be produced and recovered via azeotropic distillation. In certain embodiments cyclic esters, such as glycolide and lactide, can be produced from a fermentation broth or other feed stream that contains a hydroxy organic acid... | 01/10/2006 |
| 6939980 | Process for producing ester A method for producing an ester comprising the steps of reacting an alcohol with a carboxylic acid to obtain a crude esterfied product, adding 5 to 100 parts by weight of a hydrocarbon solvent with respect to 100 parts by weight of the crude esterified product and p... | 09/06/2005 |
| 6933404 | Methods of making intermediates from polyhydroxyalkanoates In some embodiments, this invention relates to a method that includes contacting a PHA with an aprotic catalyst to form an ester. The ester has only one monomer unit from the PHA. In certain embodiments, this invention relates to a method that includes treating a PH... | 08/23/2005 |
| 6926810 | Process for obtaining an organic acid from an organic acid ammonium salt, an organic acid amide, or an alkylamine organic acid complex Disclosed herein are methods for the recovery of an organic acid, such as a heat stable lactic acid, from a feed stream which contains at least one of an organic acid amide, an organic acid ammonium salt, or an alkylamine-organic acid complex. The feed stream is mix... | 08/09/2005 |
| 6916939 | Process for the preparation of cyclic esters and method for purification of the same The present invention provides a process for production of a cyclic ester by depolymerization of an aliphatic polyester. In the process, a mixture containing the aliphatic polyester and a specific polyalkylene glycol ether, which has a boiling point of 230-450° C. ... | 07/12/2005 |
| 6891048 | Glycolide production process, and glycolic acid composition The invention provides a process for producing glycolide by depolymerization by heating of a glycolic acid oligomer in the presence or absence of a solvent, which process ensures stable depolymerization. The depolymerization reaction is carried out while the content... | 05/10/2005 |
| 6875839 | Method for producing polylactic acid and corresponding device The invention relates to a method for producing polylactic acid, comprising the steps of obtaining lactic acid from starchy agricultural products by fermentation, ultrapurification of the lactic acid by ultrafiltration, nanofiltration and/or electrodialysis, concent... | 04/05/2005 |
| 6861538 | Process for the preparation of cyclic lactic acid oligomer The object of the present invention is to provide a novel method for effectively producing a cyclic lactic acid oligomer, and a cyclic lactic acid oligomer produced by the method. According to the present invention, there is provided a method for producing a cyclic ... | 03/01/2005 |
| 6800767 | Method for purifying cyclic esters The invention concerns a method for purifying the dimeric cyclic esters of lactic (or glycolic) acid starting from a raw lactide (or glycolide) comprising impurities, the method consisting in: extractive and controlled crystallization of the raw lactide, in aqueous ... | 10/05/2004 |
| 6756013 | Compositions of iodonium compounds and methods and uses thereof The present invention provides a composition having biological activity. The composition includes from about 10 ppm to about 5000 parts iodonium salt. The composition also includes from about 100 ppm to about 300,000 ppm of a compound to act as a carrier of the iodo... | 06/29/2004 |
| 6693204 | Method for purification of cyclic ester A method of refining a crystal of a crude cyclic ester comprises the steps of supplying the crude cyclic ester to a vertically extending cylindrical refiner (1) from an inlet (3) provided at a lower part of the refiner (1), agitating the crude cyclic este... | 02/17/2004 |
| 6548674 | Amido compounds and process for producing the same A 6-aminocarbonylmethyl-4H-2,3-dioxin-4-one compounds can be produced by reacting a 6-halomethyl-4H-2,3-dioxin-4-one compound with a primary or secondary amine and carbon monoxide. The reaction may be carried out in the presence of a catalyst comprising a... | 04/15/2003 |
| 6514666 | Photoresist monomers, polymers thereof and photoresist compositions containing it The present invention provides photoresist monomers, and photoresist polymers comprising the same. In one aspect of the present invention, the photoresist monomer of the present invention is dipropargyl malonic acid cyclic isopropylidene ester of the form... | 02/04/2003 |
| 6407247 | Photo-stable cosmetic and pharmaceutical formulations containing UV-filters A method of using compounds of formula I ##STR1## in which the C.dbd.C double bond is present in E and/or Z configuration and the variables have the following meanings: R1 denotes COOR5, COR5, CONR5 R6, CN... | 06/18/2002 |
| 6384241 | Purified salt of ଲ-hydroxyethoxy acetic acid, purified 2-p-dioxanone, and manufacturing method therefor A purified salt of ଲ-hydroxyethoxy acetic acid of formula (1) having a fusion peak-top temperature detected by differential scanning calorimetry (DSC) and a purified 2-p-dioxanone of formula (2) derived from the purified salt of ଲ-hydroxyethox... | 05/07/2002 |
| 6326458 | Continuous process for the manufacture of lactide and lactide polymers A process for the continuous production of substantially purified lactide and lactide polymers from lactic acid or an ester of lactic acid including the steps of forming crude polylactic acid, preferably in the presence of a catalyst means in the case of ... | 12/04/2001 |
| 6313319 | Method for purifying lactide and lactide for food additives A crude lactide in a solid state or in an at least partially molten state is brought into contact with ethanol to form a slurry mixture, and then a solid form this slurry mixture is separated to yield a purified lactide having a high purity. A crude lacti... | 11/06/2001 |
| 6303796 | ଲ-diketone compounds ଲ-diketone compounds coordinated to metal, method of organic synthesis with these, and catalyst The present invention provides a novel ଲ-diketone compound represented by formula (3): ##STR1## [wherein X represents (CH2)n ; n represents an integer of 2-20; and the CH2 of X may be replaced by an oxygen atom, a he... | 10/16/2001 |
