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| Number | Title | Issue Date |
| 8178717 | Process for production of (meth)acrylic acid with high boiling fraction work-up by means of crystallization A process for production of (meth)acrylic acid is disclosed. The process includes synthesizing and distillatively working-up a crude (meth)acrylic acid phase to obtain a (meth)acrylic acid phase and a dimer phase including (meth)acrylic acid dimers and/or (meth)acry... | 05/15/2012 |
| 7999133 | Methods for making unsaturated acids using catalysts for methacrolein oxidation Methods for making unsaturated acids using catalysts for oxidation of unsaturated and/or saturated aldehyde to unsaturated acids is disclosed where the catalyst including at least molybdenum (Mo) and phosphorus (P), where the catalyst has a pore size distribution in... | 08/16/2011 |
| 7820854 | Process for converting alkanes to unsaturated carboxylic acids The present invention relates to an improved process for the conversion of alkanes to unsaturated carboxylic acids. ... | 10/26/2010 |
| 7439388 | Process for converting primary amidoalcohols to amidocarboxylic acids in high yield using water as solvent The invention relates to an improved process for oxidizing a primary amidoalcohol to the corresponding amidocarboxylic acid in high yield. ... | 10/21/2008 |
| 7388106 | Process for preparing acrolein or acrylic acid or a mixture thereof from propane A process for preparing acrolein or acrylic acid or a mixture thereof from propane, in which propane is dehydrogenated under heterogeneous catalysis in a reaction zone A and the propylene formed is partially oxidized heterogeneously in a reaction zone, reaction zone... | 06/17/2008 |
| 7368598 | Process for converting methane to acetic acid Provided herein are processes for conversion of methane to acetic acid. In one embodiment, the processes are for direct, selective conversion of methane to acetic acid in a single step. ... | 05/06/2008 |
| 7365217 | Oxidation process A process is disclosed for reacting an olefin, hydrogen, and oxygen in a reactor in the presence of an epoxidation catalyst comprising a transition metal zeolite and a noble metal to produce a product stream comprising an epoxide and an alkane. The alkane is separat... | 04/29/2008 |
| 7358380 | Ru-substituted polyoxometalates and process for their preparation The invention relates to polyoxometalates represented by the formula (An)m+[R2(H2O)6X2W20O70]m− or solvates thereof, wherein A represents a cation, n is the number o... | 04/15/2008 |
| 7326810 | Method for starting up reactor In the reaction of catalytic gas phase oxidation induced by the supply of at least a raw material to be oxidized and a molecular oxygen-containing gas to a reactor for catalytic gas phase oxidation, a method for starting up the reactor for catalytic gas phase oxidat... | 02/05/2008 |
| 7294734 | Process for converting a hydrocarbon to an oxygenate or a nitrile This invention relates to a process for converting a hydrocarbon reactant to a product comprising an oxygenate or a nitrile, the process comprising: (A) flowing a reactant composition comprising the hydrocarbon reactant, and oxygen or a source of oxygen, and optiona... | 11/13/2007 |
| 7285679 | Oxidation of alkanes Alkanes are oxidised to oxygenates such as carboxylic acids with molecular oxygen employing a two component catalyst system which uses a liganded heavy metal compound and a mixed metal oxide. ... | 10/23/2007 |
| 7238827 | Preparation of at least one partial oxidation and/or ammoxidation product of propylene Process for preparing at least one partial oxidation and/or ammoxidation product of propylene, in which the propylene is produced from crude propane by dehydrogenation and is subjected to a heterogeneously catalyzed gas-phase partial oxidation and/or partial gas-pha... | 07/03/2007 |
| 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 |
| 7217750 | Process for incorporating one or more materials into a polymer composition and products produced thereby The present invention relates to various processes that utilize one or more supercritical fluids to disperse various inorganic and organic materials, including crystalline materials, into polymeric compositions, substrates or pre-formed articles without the utilizat... | 05/15/2007 |
| 7211688 | Process for the production of an alkenyl carboxylate or an alkyl carboxylate Process for producing an alkyl carboxylate, comprising contacting in an oxidation reaction zone a C2 to C4 alkane, a molecular oxygen-containing gas, the corresponding alkene and optionally water, in the presence of at least one catalyst active... | 05/01/2007 |
| 7189377 | Apparatus for performing integrated process for reproduction of vinyl acetate and/or acetic acid using a fluidized bed 1. 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... | 03/13/2007 |
| 7186345 | Systems for water purification through supercritical oxidation Supercritical water (SCW) systems and methods using the properties of supercritical water to allow a raw water stream including water and a contaminant to be purified. A supercritical water oxidation (SCWO), water purifier may generally include water and oxidizer (s... | 03/06/2007 |
| 7179875 | Method for producing water-absorbent resins In a process for preparing water-absorbent resins based on acrylic acid, crude acrylic acid is firstly isolated from the reaction gases from the catalytic gas-phase oxidation of propane, propylene and/or acrolein. This is treated with an aldehyde scavenger and pure ... | 02/20/2007 |
| 7145041 | Method for producing saturated alcohols, ketones, aldehydes and carboxylic acids The invention relates to a method for catalytically oxidizing unsaturated hydrocarbons to form oxidation products, and to the production of saturated alcohols, ketones, aldehydes or carboxylic acids by subsequently hydrogenating the oxidation product. A compound of ... | 12/05/2006 |
| 7122707 | Method for producing an annular shell catalyst and use thereof for producing acrolein Coated catalysts which are suitable for the gas-phase catalytic oxidation of propene to acrolein are prepared by a process in which rings are used as supports and water is used as a binder. ... | 10/17/2006 |
| 7078563 | 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 the corresponding alken... | 07/18/2006 |
| 7061957 | External cavity laser having a set atmosphere An external cavity laser having a set atmosphere is disclosed. In an embodiment, the laser system includes a gain medium to emit light in response to an applied current, a wavelength selective reflector configured to resonate the light that is emitted from the gain ... | 06/13/2006 |
| 7030279 | Process for transition metal free catalytic aerobic oxidation of alcohols under mild conditions using stable free nitroxyl radicals An alcohol can be oxidized by a process in which a primary or secondary alcohol are reacted with an oxygen-containing gas in the presence of a catalyst composition containing (i) a stable free nitroxyl radical derivative, (ii) a nitrate source, (iii) a bromide sourc... | 04/18/2006 |
| 7015355 | Method for the selective production of acetic acid by catalytic oxidation of ethane and/or ethylene A method for the selective production of acetic acid from a gas-phase feed of ethane, ethylene, or mixtures thereof and oxygen at elevated temperatures. The gas-phase feed is brought into contact with a catalyst, containing the elements Mo, Pd, X and Y in the gram a... | 03/21/2006 |
| 6864391 | Method for producing propylene hydroformylation products and acrylic acid and/or acrolein A process for preparing hydroformylation products of propylene and for preparing acrylic acid and/or acrolein comprises a) feeding a propylene-containing feed in which from 2 to 40% by weight of propane is present and also carbon monoxide and hydrogen into a reactio... | 03/08/2005 |
| 6831195 | Method for production of organic acid A method for producing an organic acid and/or an organic acid ester which utilizes a steam system permitting stable production of an organic acid and/or an organic acid ester and realizing a high thermal efficiency constantly relative to the waste heat generated in ... | 12/14/2004 |
| 6812366 | Catalyst useful for oxidation reactions A catalyst useful for oxidation reactions is disclosed. The catalyst is useful for the gas phase oxidation of alkanes, propylene, acrolein, or isopropanol to unsaturated aldehydes or carboxylic acids. ... | 11/02/2004 |
| 6806385 | Rectification of (meth)acrylic acid with the addition of a tenside In a process for rectificative isolation of (meth)acrylic acid from a mixture containing, as main components, (meth)acrylic acid and an organic liquid having a higher boiling point than (meth)acrylic acid, the rectification is carried out with the addition of a surf... | 10/19/2004 |
| 6787671 | Catalytic osmium-assisted oxidative cleavage of olefins An osmium-assisted process for the oxidative cleavage of oxidizable organic compounds such as unsaturated organic compounds, including alkenes and olefins into aldehydes, carboxylic acids, esters, or ketones. The process uses a metal catalyst comprising osmium and a... | 09/07/2004 |
| 6781017 | Method for the production of acrolein or acrylic acid or the mixture thereof from propane In a process for the preparation of acrolein or acrylic acid or a mixture thereof from propane, the propane is subjected, in a first reaction stage, to a partial dehydrogenation under heterogeneous catalysis to give propene, of the components contained in the produc... | 08/24/2004 |
| 6700015 | Zn and/or Ga promoted multi-metal oxide catalyst A catalyst comprising a promoted mixed metal oxide is useful for the vapor phase oxidation of an alkane or a mixture of an alkane and an alkene to an unsaturated carboxylic acid and for the vapor phase ammoxidation of an alkane or a mixture of an alkane a... | 03/02/2004 |
| 6677482 | Method of manufacturing (meth) acrylic acid A method of manufacturing (meth)acrylic acid includes: a reaction step of carrying out a catalytic gas-phase oxidation reaction; an absorbing step of absorbing (meth)acrylic acid from a (meth)acrylic-acid-containing mixed gas prepared in the reaction step; ... | 01/13/2004 |
| 6646158 | Catalytic oxidation of alkanes to corresponding acids A mixed metal oxide Mo--V--Ga--Pd--Nb--X catalytic system, where X is selected from La, Te, and Zn, provides the oxidation of C2 -C8 hydrocarbons to corresponding acids with a molecular oxygen-containing gas.... | 11/11/2003 |
| 6620968 | High hydrocarbon space velocity process for preparing unsaturated aldehydes and acids This invention relates to a high load process for preparing (meth)acrylic acid from a reactive hydrocarbon using a high reactive hydrocarbon space velocity to provide increased capacity and throughput.... | 09/16/2003 |
| 6525216 | Method of manufacturing (meth)acrylic acid A method of manufacturing (meth)acrylic acid includes: a reaction step of carrying out a catalytic gas-phase oxidation reaction; an absorbing step of absorbing (meth)acrylic acid from a (meth)acrylic-acid-containing mixed gas prepared in the reaction step; a refine... | 02/25/2003 |
| 6498272 | Method for producing acrylic acid In a process for the preparation of acrylic acid, a product gas mixture obtained by catalytic gas-phase oxidation of a C3 -precursor of acrylic acid and containing acrylic acid is directly cooled with a quench liquid and then subjected to fract... | 12/24/2002 |
| 6492548 | Process for the oxidation of alkanes Processes are disclosed for the oxidation of alkanes such as, for example, propane, to form unsaturated carboxylic aldehydes and acids such as, for example, acrolein and acrylic acid. The processes utilize oxygen and recycle alkanes, e.g. propane, to the ... | 12/10/2002 |
| 6448439 | Method for producing acrylic acid and methacrylic acid A process for preparing acrylic acid or methacrylic acid comprises preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3 -/C4 -alkanes, -alkenes, -alka... | 09/10/2002 |
| 6429331 | Process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms from butenes and butanes A process for preparing saturated carboxylic acids having from 1 to 4 carbon atoms at a reaction temperature of from 100° C. to 400° C. and pressures of from 1.2×105 Pa to 51×105 Pa by gas phase oxidation of saturated and/or ... | 08/06/2002 |
| 6399816 | Method for selectively producing acetic acid through the catalytic oxidation of ethane The invention relates to a method for selectively producing acetic acid from a gaseous feedstock of ethane, ethylene or mixtures thereof and oxygen at a high temperature. Said gaseous feedstock is brought together with a catalyst containing the elements M... | 06/04/2002 |
