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| Number | Title | Issue Date |
| 7855303 | Integrated process for the production of vinyl acetate from acetic acid via ethylene This invention provides an integrated two stage economical process for the production of vinyl acetate monomer (VAM) from acetic acid in the vapor phase. First, acetic acid is selectively hydrogenated over a hydrogenating catalyst composition to form ethylene either... | 12/21/2010 |
| 7700801 | Co-production of vinyl acetate and ethyl acetate A method of co-producing vinyl acetate and ethyl acetate includes: (a) reacting ethylene, acetic acid and oxygen to form vinyl acetate and at least a minor amount of ethyl acetate; (b) providing a crude product stream containing the vinyl acetate and ethyl acetate o... | 04/20/2010 |
| 7534910 | Process for the production of alkenyl carboxylates The present invention provides a process for the production of an alkenyl carboxylate by reacting an alkene, a carboxylic acid and a molecular oxygen-containing gas in a reaction zone in the presence of a catalyst at an elevated reaction temperature, T, to produce a... | 05/19/2009 |
| 7518014 | Modified support materials for catalysts The present invention relates to a method of producing a catalyst or pre-catalyst suitable for assisting in the production of alkenyl alkanoates. The method includes contacting a modifier precursor to a support material to form a modified support material. One or mo... | 04/14/2009 |
| 7491843 | Integrated process for the production of vinyl acetate and/or acetic acid Acetic acid and/or vinyl acetate are produced by an integrated process which comprises the steps: (a) contacting in a first reaction zone a gaseous feedstock comprising ethylene and/or ethane and optionally steam with a molecular oxygen-containing gas i... | 02/17/2009 |
| 7411107 | Alkene separation process A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises separation of the alkene from a mixture of the alkene, the alkane and oxygen by absorption in a metallic salt solut... | 08/12/2008 |
| 7262322 | Oxidation process for the production of carboxylic acids and alkenes An oxidation process for the production of alkenes and carboxylic acids from a feed comprising alkene and/or alkane, carbon monoxide, a molecular oxygen containing gas and optionally water in the presence of an oxidation catalyst in which the level of carbon monoxid... | 08/28/2007 |
| 7227049 | Ni catalysts and methods for alkane dehydrogenation Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), y... | 06/05/2007 |
| 7189883 | Diazaphospholane ligands for asymmetric catalysis This invention relates to asymmetric hydroformylation processes in which a prochiral or chiral olefin is reacted with carbon monoxide and hydrogen in the presence of an optically active metal-ligand complex catalyst to produce an optically active aldehyde or a produ... | 03/13/2007 |
| 7169735 | Catalyst and process for preparing the same The object of the present invention is to provide a catalyst that is highly active and capable of maintaining its activity for a long period of time even in a high-temperature environment. The present invention is a catalyst including: a porous carrier which is comp... | 01/30/2007 |
| 7053024 | Process for making a catalyst Process for preparing a supported metal catalyst composition comprising impregnating support particles having a mean diameter of greater than 300 microns with a solution of least one catalytically active metal, or precursor thereof, such that the metal, or its precu... | 05/30/2006 |
| RE38864 | Process for making n-butyl esters from butadiene Process for making a butyl ester from butadiene, comprising (a) reacting butadiene with a saturated aliphatic monocarboxylic acid to form a mixture of n-butenyl and secondary butenyl esters, (b) separating the n-butenyl ester from the secondary butenyl ester, and (c... | 11/01/2005 |
| 6946570 | Ester synthesis This invention relates to a process for the production of lower aliphatic esters by reacting a lower olefin with a saturated lower aliphatic mono-carboxylic acid in the vapor phase in the presence of a heteropolyacid catalyst in a plurality of reactors set up in ser... | 09/20/2005 |
| 6936564 | Supported catalyst consisting of metal of the platinum group and obtained by means of controlled electroless deposition The invention relates to a supported platinum group metal catalyst obtainable by controlled electroless deposition of at least one platinum group metal from a deposition solution which comprises i) at least one homogeneously dissol... | 08/30/2005 |
| 6852877 | Process for the production of vinyl acetate A process for the production of vinyl acetate comprising contacting in a first reaction zone a gaseous feedstock comprising essentially ethane with a molecular oxygen-containing gas in the presence of a catalyst to produce a first product stream comprising acetic ac... | 02/08/2005 |
| 6825149 | Highly selective shell impregnated catalyst of improved space time yield for production of vinyl acetate A shell impregnated catalyst of Pd-Au produced on a silica support to have a Pd loading of 1.8 g/L of catalyst to about 7.2 g/L and a Au to Pd weight ratio of 0.3 to 2.0 by impregnating the support with aqueous solutions of palladium and gold salts or acids and ther... | 11/30/2004 |
| 6809218 | Sol-gel derived porous microcomposite of perfluorinated ion-exchange polymer and metal oxide Porous microcomposites have been prepared from perfluorinated ion-exchange polymer and metal oxides such as silica using the sol-gel process. Such microcomposites possess high surface area and exhibit extremely high catalytic activity. ... | 10/26/2004 |
| 6794535 | Ester synthesis Process for the production of lower aliphatic esters comprising reacting a lower olefin with a saturated lower aliphatic monocarboxylic acid in the vapor phase in the presence of a heteropolyacid catalyst. The reaction is carried out in a plurality of reactors set u... | 09/21/2004 |
| 6781014 | Methanol plant retrofit for manufacture of acetic acid The retrofitting of an existing methanol or methanol/ammonia plant to make acetic acid is disclosed. The existing plant has a reformer (10) to which natural gas or another hydrocarbon and steam (water) are fed. Syngas is formed in the reformer (10). Al... | 08/24/2004 |
| 6770791 | Production of olefin dimers and oligomers Disclosed is an olefin containing stream from an oxygenate to olefin process, and a process for making olefin dimer and oligomer product from the olefin containing stream using a nickel based oligomerization catalyst. The dimer/oligomer product is optionally convert... | 08/03/2004 |
| 6727380 | Oxidation process for the production of alkenes and carboxylic acids A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, at least on... | 04/27/2004 |
| 6548697 | Oxidation process for the production of alkenes and carboxylic acids A process for the oxidation of a C2 to C4 alkane to produce the corresponding alkene and carboxylic acid which process comprises contacting in an oxidation reaction zone, said alkane, molecular oxygen-containing gas, and optionally, ... | 04/15/2003 |
| 6534672 | Fluid bed vinyl acetate catalyst A catalytically active material useful to prepare vinyl acetate monomer from ethylene, acetic acid, and an oxygen-containing gas under fluid bed conditions comprises a porous microspheroidal support containing catalytically active palladium crystallites f... | 03/18/2003 |
| 6472556 | Catalyst and use thereof in the production of vinyl acetate A catalyst for use in the production of vinyl acetate which comprises (1) a catalyst support, (2) palladium, (3) an acid, (4) at least one acetic acid catalyst promoter and (5) at least one vinyl acetate promoter and/or co-promoter. A process for the prod... | 10/29/2002 |
| 6465683 | Process for making n-butyl esters from butadiene Process for making a butyl ester from butadiene, comprising (a) reacting butadiene with a saturated aliphatic monocarboxylic acid to form a mixture of n-butenyl and secondary butenyl esters, (b) separating the n-butenyl ester from the secondary butenyl es... | 10/15/2002 |
| 6455023 | Metallic catalysts for non-neutral liquid media Carbon monolith-supported catalysts with high leach resistance used in catalytic applications involving strong acidic and basic conditions in a pH range of from 0 to 6.5 and from 7.5 to 14, are respectively described. The leach resistance of the catalyst ... | 09/24/2002 |
| 6376706 | Catalyst and use thereof in the production of vinyl acetate A catalyst for use in the production of vinyl acetate which comprises (1) a catalyst support, (2) palladium, (3) an acid, (4) at least one acetic acid catalyst promoter and (5) at least one vinyl acetate promoter and/or co-promoter. A process for the prod... | 04/23/2002 |
| 6333430 | Process for preparing tert-alkyl ester from carboxylic acid A process for preparing a tert-alkyl carboxylic acid ester represented by the formula (III): ##STR1## wherein R1 is an organic group; and each of R2 and R3 is independently an alkyl group having 1 to 4 carbon atoms, compri... | 12/25/2001 |
| 6288269 | Apparatus for introducing fluid into a process stream Apparatus for introducing a fluid into a process stream such as promoter into the feed stream of a reactor for manufacturing vinyl acetate comprises: (a) a process stream pipe having a bend and (b) a nozzle for introducing the fluid into the process strea... | 09/11/2001 |
| 6232491 | Purification process for removal of impurities in acetic acid-ethylene reactions This invention is a process for the removal of acetaldehyde impurities from ethyl acetate formed by reacting acetic acid with ethylene over a catalyst by refining a crude mixture of ethyl acetate, diethyl ether, acetaldehye and water in a column (C) so as... | 05/15/2001 |
| 6194602 | Tertiary alkyl ester preparation A tertiary olefin such as isobutylene is reacted with a lower carboxylic acid to produce the ester in the presence of a large pore zeolite catalyst such as Zeolite Y, Zeolite beta or Zeolite X.... | 02/27/2001 |
| 6118021 | Membrane process for argon purging from vinyl acetate reactors A process and apparatus for vinyl acetate production. A membrane unit containing a membrane selectively permeable to ethylene over argon is used to recover ethylene from the argon purge stream.... | 09/12/2000 |
| 6093857 | Preparation of cyclopentanols A process for preparing cyclopentyl formates of the formula (II) ##STR1## by reacting cyclopentenes of the formula (I) ##STR2## where R1, R2 and R3, independently of one another, are hydrogen atoms or C1-8 | 07/25/2000 |
| 6013834 | Production of vinyl acetate in a catalytic reactor equipped with filter and distribution bed A process for the production of vinyl acetate (VA) by reaction in the vapor phase of ethylene, oxygen and acetic acid as reactants, comprising passing at a temperature sufficient to initiate the reaction, a feed gas comprising said reactants and continuou... | 01/11/2000 |
| 5859287 | Process for preparing vinyl acetate utilizing a catalyst comprising palladium, gold, and any of certain third metals A catalyst for the production of vinyl acetate by reaction of ethylene, oxygen and acetic acid as reactants comprising a porous support on the porous surfaces of which is deposited catalytically effective amounts of metallic palladium and gold and a third... | 01/12/1999 |
| 5476963 | Supported catalyst, process for its preparation and its use for the preparation of vinyl acetate Supported catalyst, process for its preparation and its use for the preparation of vinyl acetate The invention relates to improved Pd/K/Au, Pd/K/Ba and Pd/K/Cd supported catalysts, their preparation and their use for the preparation of vinyl acetate from ... | 12/19/1995 |
| 5457228 | Method for producing lower alkyl acetate A method for producing a lower alkyl acetate in which undesirable polymerization of the starting material of olefin and deterioration of catalyst can be avoided, a higher catalytic efficiency and a higher reaction rate are attained, the installation of re... | 10/10/1995 |
| 5395960 | Preparation of vinyl carboxylates Preparation of vinyl carboxylates by the reaction of a carboxylic acid with acetylene in the presence of a platinum metal complex catalyst, which contains as ligands carbon monoxide or a nitrile (I), a tertiary nitrogen base (II), a tertiary phosphorus co... | 03/07/1995 |
| 5258544 | Synthesis of aldehydes useful in the preparations of HMG-CoA reductase inhibitors Disclosed is a process for the preparation of 2-aryl-1-cyclohexene-1-carboxaldehydes from 1-arylcyclohexenes which are intermediates for trans-6-[(2-arylsubstituted cycloalkenyl and substituted cycloalkyl)alkenyl and alkyl]-3,4,5,6-tetrahydro-2H-pyran-2-o... | 11/02/1993 |
| 5254721 | Process for producing cyclohexyl acetate Cyclohexyl acetate is produced by reacting acetic acid with cyclohexene in the presence of a heteropolyacid mainly composed of oxides of tungsten as a catalyst. The heteropolyacid may have water of crystallization adjusted to the amount of average 3.0 mol... | 10/19/1993 |
