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| Number | Title | Issue Date |
| 7754916 | Process for converting a hydroxycarboxylic acid, or salts thereof, to an unsaturated carboxylic acid and/or its esters A process for converting a salt of a hydroxycarboxylic acid to an unsaturated carboxylic acid, or esters thereof. The process involves converting an ammonium salt of a hydroxycarboxylic acid in aqueous solution to a corresponding hydroxycarboxylic acid and ammonium ... | 07/13/2010 |
| 7423173 | Method for producing alpha-hydroxycarboxylic acids and the esters thereof The invention relates to a process for the selective, economically viable preparation of methacrylic acid and methacrylic esters starting from acetone cyanohydrin, wherein, in a first step, 2-hydroxy-2-methylpropionic acid is prepared by reacting acetone cyanohydrin... | 09/09/2008 |
| 7301052 | Process for producing perfluorodiacyl fluorinated compounds The present invention provides a process for producing compounds useful as raw materials for various fluororesins in high yields in few steps from inexpensive and readily available starting materials. The following compound (1) and the following compound (2) ... | 11/27/2007 |
| 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 |
| 7157599 | Method of producing α,β-unsaturated carboxylic acid compounds There is disclosed a method of producing α,β-unsaturated carboxylic acid of formula (3) wherein R1 denotes a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, an alkenyl group or an alk... | 01/02/2007 |
| 7125817 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Group 3 a... | 10/24/2006 |
| 7122493 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises: (1) at least one solid acid component, (2) at least one metal-based compo... | 10/17/2006 |
| 7122495 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst system contains at least one solid acid component and at least one metal-based component which consists of (a) oxygen and/or sulfur and ... | 10/17/2006 |
| 7122494 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of two or more elements from Groups 4â... | 10/17/2006 |
| 7122492 | Combined cracking and selective hydrogen combustion for catalytic cracking A catalyst system and process for combined cracking and selective hydrogen combustion of hydrocarbons are disclosed. The catalyst comprises (1) at least one solid acid component, (2) at least one metal-based component comprised of one or more elements from Groups 1 ... | 10/17/2006 |
| 7119228 | Process for producing methionine The present invention is directed to an improved process for producing methionine in which the by-product methionyl-methionine is quickly converted to the product methionine by a hydrolysis reaction. The process is performed at high temperatures (200° C. to 280° C... | 10/10/2006 |
| 6992209 | Methods of forming alpha, beta-unsaturated acids and esters The invention includes a method of forming an alpha, beta-unsaturated compound. A carboxylic acid is mixed with an alpha-hydroxy acid or an alpha-hydroxy ester and is esterified to form an alpha-acyloxy derivative. The alpha-acyloxy derivative is transformed into an... | 01/31/2006 |
| 6897338 | Methods of making intermediates from polyhydroxyalkanoates Methods of forming acrylic acid from a PHA, such as, for example, poly 3-hydroxypropionate or a 3-hydroxypropionate containing polymer are disclosed. The methods can include, for example, heating a biomass containing the PHA to form acrylic acid. The methods can inc... | 05/24/2005 |
| 6870066 | Method for decomposition of Michael type adduct A method for the decomposition of a Michael type adduct of an acrylic acid and/or an acrylic ester represented by the following formula [I] or [II] is disclosed, wherein decomposing the Michael type adduct in the presence of at least one copper salt and at least one... | 03/22/2005 |
| 6784134 | Catalyst for preparation of unsaturated aldehyde and unsaturated carboxylic acid A catalyst suited for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. Said catalyst consists of ring-formed shaped bodies composed of (i) a... | 08/31/2004 |
| 6670501 | Process for the production of methyl methacrylate A process for the manufacture of methyl methacrylate includes a process for separating the methyl methacrylate from certain impurities, at least one of which has a freezing point of greater than -50° C., by a fractional crystallisation process.... | 12/30/2003 |
| 6624326 | Method for preparing heteropolyacid catalyst and method for producing methacrylic acid A novel method for preparing a heteropolyacid catalyst containing a heteropolyacid composed of molybdophosphoric acid and/or molybdovanadophosphoric acid, or a salt of the heteropolyacid, is provided. The method comprises preparing an aqueous solution or ... | 09/23/2003 |
| 6617470 | Method for esterifying (meth)acrylic acid with an alkanol In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom... | 09/09/2003 |
| 6476259 | Catalysts for methacrylic acid production and process for producing methacrylic acid Improved catalyst for use in production of methacrylic acid by vapor phase oxidation reaction and/or vapor phase oxidative dehydrogenation reaction of at least one compound selected from methacrolein, isobutylaldehyde and isobutyric acid is provided. This... | 11/05/2002 |
| 6452041 | Olefination process to itaconate and succinate derivatives An efficient and selective process, capable of scale-up, to make itaconate derivatives of formula (IV), and/or succinate derivatives of formula (V) and/or (VI) by asymmetric hydrogenation of the itaconate derivatives. ##STR1## wherein R, R1 and... | 09/17/2002 |
| 6380427 | Process for purification of (meth)acrylic acid A process for purification of (meth)acrylic acid which comprises adding to a crude (meth)acrylic acid one or two or more polar organic substances as a second component at a concentration of 1-35% by weight, crystallizing (meth)acrylic acid from the result... | 04/30/2002 |
| 6310237 | Process for the preparation and uses of derivatives of esters of -methylene-ଲ-hydroxy acids A process for the preparation of derivatives of halo-but-2-enoic acids and esters high in 2-ene content, several of which are novel. The esters and their derivatives are useful as promoters for the polymerization of ethylene or the copolymerization of eth... | 10/30/2001 |
| 6166074 | Pharmaceutical compositions Pharmaceutical compositions which are useful for the treatment of cancer or illnesses which arise due to an abnormally elevated cell proliferation comprise acyl derivatives of aromatic aldehydes, especially arylidene diesters and -alkoxyarylidene e... | 12/26/2000 |
| 6147251 | Process for the preparation and uses of derivatives of esters of -methylene-ଲ-hydroxy acids A process for the preparation of derivatives of halo-but-2-enoic acids and esters high in 2-ene content, several of which are novel. The esters and their derivatives are useful as promoters for the polymerization of ethylene or the copolymerization of eth... | 11/14/2000 |
| 6034268 | 8-Ocimenyl esters and fragrances and flavors containing the same Compounds of the formula ##STR1## in which one of the radicals R1 and R2 is methyl and the other is vinyl and one of the radicals R3 and R4 is methyl and the other is ##STR2## in which R5 | 03/07/2000 |
| 6011176 | Using anionic flocculants for organic-aqueous phase separation The use of organic, polymeric, anionic water-soluble flocculants for the phase separation of an organic-aqueous system which essentially comprises monomeric acrylates, diacrylates, (poly)ester acrylates or (poly)ether acrylates and unreacted residues of t... | 01/04/2000 |
| 5998657 | Process for the generation of , ଲ-unsaturated carboxylic acids and esters using niobium catalyst A process using a niobium catalyst includes the step of reacting an ester or carboxylic acid with oxygen and an alcohol in the presence a niobium catalyst to respectively produce an ,ଲ-unsaturated ester or carboxylic acid. Methanol may be use... | 12/07/1999 |
| 5886220 | Process for preventing polymerization of vinyl compound There is disclosed a process for preventing the polymerization of a vinyl compound which comprises allowing water in an amount of 0.05 to 5% by weight based on the vinyl compound or a corrosion inhibitive substance selected from an alcohol, an inorganic a... | 03/23/1999 |
| 5856568 | Process for inhibiting polymerization of a vinyl compound A process for inhibiting polymerization of a vinyl compound comprising using (A) one or both of N-nitrosophenylhydroxylamine and a salt thereof in combination with (B) a salt of copper or in combination with (B') a metal salt of a dialkyldithiocarbamic ac... | 01/05/1999 |
| 5808148 | Preparation of ,ଲ-unsaturated carboxylic acids and esters Disclosed is a process for the preparation of ,ଲ-unsaturated carboxylic acids and esters thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic acid, ester or anhydride in the presence of a catalyst comp... | 09/15/1998 |
| 5763651 | Process for manufacturing polyene esters and acids A process for the manufacture of polyene esters or polyene acids comprises reacting a polyene O,O-dialkylacetal of di(O,O-dialkylacetal) with a vinylketene acetal or analogue thereof in the presence of a Lewis acid, hydrolyzing the reaction mixture depend... | 06/09/1998 |
| 5710328 | Preparation of , ଲ-unsaturated carboxylic acids and anhydrides Disclosed is a process for the preparation of ,ଲ-unsaturated carboxylic acids and anhydrides thereof which comprises contacting formaldehyde or a source of formaldehyde with a carboxylic anhydride in the presence of a catalyst comprising mixe... | 01/20/1998 |
| 5602280 | Process for production of unsaturated aldehyde and unsaturated carboxylic acid Disclosed are a process for producing an unsaturated aldehyde and an unsaturated carboxylic acid which comprises subjecting propylene, isobutylene or tertiary butanol to gas phase catalytic oxidation with molecular oxygen in the presence of (i) a catalyst... | 02/11/1997 |
| 5523480 | Process for purifying unsaturated carboxylic acids using distillation and melt crystallization A process for the preparation of an ,ଲ-unsaturated C3 -C6 carboxylic acid of greater than 98% purity, which combines fractional distillation and melt crystallization procedures.... | 06/04/1996 |
| 5399752 | Purification of carboxyl streams Disclosed is a process for the purification of carboxyl streams such as product streams comprising one or more carboxyl compounds selected from carboxylic acids, carboxylic anhydrides and alkylidene dicarboxylates. The process provides a means for the red... | 03/21/1995 |
| 5354886 | Catalysts on inorganic carriers for producing ethylidene diacetate The present invention relates to a catalyst, a process for preparing the catalyst and a process for using the catalyst to produce ethylidene diacetate. The conventional preparation methods of ethylidene diacetate suffer from difficulty in separating the c... | 10/11/1994 |
| 5330954 | Catalytic system and its application to the oxydehydrogenation of saturated carboxylic acids and the oxidation of aldehydes to acids A catalytic system based on oxygen, vanadium, phosphorus, and molybdenum corresponding to the formula Hm Xn Mep PMo12-x Vx O40, wherein X represents the VO2+ cation with 0 | 07/19/1994 |
| 5276178 | Process for producing methacrolein and methacrylic acid The present invention provides a process for producing methacrolein and methacrylic acid by subjecting at least one material selected from isobutylene, t-butanol and methyl t-butyl ether to gas phase catalytic oxidation with molecular oxygen or a molecula... | 01/04/1994 |
| 5268506 | Process for producing , ଲ-unsaturated carboxylic acid An , ଲ-unsaturated carboxylic acid is produced by catalytically reacting an -hydroxycarboxylic acid amide of the formula (1), ##STR1## where R1 and R2 are independently selected from the group consisting of h... | 12/07/1993 |
| 5264627 | Method for production of methacrylic acid A method for the production of methacrylic acid comprising the steps of simultaneously introducing at least one compound selected from the group consisting of methacrolein and isobutyl aldehyde and a molecular oxygen-containing gas into a heat exchanger t... | 11/23/1993 |
