And Group V Metal Containing (i.e., V, Nb, Ta, As, Sb Or Bi) Patents (Class 502/311)
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Patent number: 6921831Abstract: Modified lead/bismuth/molybdate catalysts containing vanadium, copper, or gold have been prepared, and are selective to the corresponding furan compound from the gas phase oxidation of an unsaturated acyclic hydrocarbon such as butadiene.Type: GrantFiled: January 15, 2003Date of Patent: July 26, 2005Assignee: E. I. du Pont de Nemours and CompanyInventors: Kostantinos Kourtakis, Patrick Mills, Carl Z. Cao
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Patent number: 6919472Abstract: A catalyst composition for the selective conversion of an alkane to an unsaturated carboxylic acid having the general formula: MoVaNbbAgcMdOx wherein optional element M may be one or more selected from aluminum, copper, lithium, sodium, potassium, rubidium, cesium, gallium, phosphorus, iron, rhenium, cobalt, chromium, manganese, arsenic, indium, thallium, bismuth, germanium, tin, cerium or lanthanum; a is 0.05 to 0.99, b is 0.01 to 0.99, c is 0.01 to 0.99, d is 0 to 0.5 and x is determined by the valence requirements of the other components of the catalyst composition. This catalyst is prepared by co-precipitation of compounds of molybdenum, vanadium, niobium, silver and M to form a mixed metal oxide catalyst. This catalyst can be used for the selective conversion of an alkane to an unsaturated carboxylic acid in a one-step process or the ammoxidation of alkanes and olefins.Type: GrantFiled: December 20, 2002Date of Patent: July 19, 2005Assignee: Saudi Basic Industries CorporationInventors: Paulette N. Hazin, Paul E. Ellis, Jr.
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Patent number: 6919478Abstract: In producing a catalyst used for synthesis of an unsaturated aldehyde and an unsaturated carboxylic acid by a gas-phase catalytic oxidation, there is used a step of packing an additive-containing catalyst precursor of the catalyst into a tubular reactor, passing a gas through the tubular reactor, and elevating, in this state, the temperature of the additive-containing catalyst precursor so that a temperature of the gas at an outlet of the catalyst precursor layer becomes higher than a temperature of the gas at an inlet of the catalyst precursor layer. The step makes possible easy and highly reproducible production of a high-performance catalyst which is small in the reduction in catalytic performance caused by, for example, the thermal decomposition of the additive contained in the catalyst precursor.Type: GrantFiled: February 19, 2002Date of Patent: July 19, 2005Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Seiichi Kawato, Masahide Kondo, Toru Kuroda, Masanori Nitta, Mieji Sugiyama
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Patent number: 6919295Abstract: A supported catalyst comprising a mixed metal oxide is useful for the vapor phase catalytic partial 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 and an alkene, to an unsaturated nitrile.Type: GrantFiled: April 22, 2003Date of Patent: July 19, 2005Assignee: Rohm and Haas CompanyInventors: Anne Mae Gaffney, Scott Han, Michelle Doreen Heffner, Nneka Namono McNeal, Elsie Mae Vickery
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Patent number: 6916763Abstract: A process for preparing an antimonate-based mixed metal oxide catalyst in a catalytically active oxidized state, wherein the catalyst is represented by the empirical formula MeaSbbXcQdReOf, wherein Me, X, Q, R, a, b, c, d, e, and f are as defined herein, comprising (a) contacting an aqueous Sb2O3 slurry with HNO3 and one or more Me compounds, and, optionally, one or more compounds selected from X, Q, or R compounds to form a first mixture; (b) heating and drying the first mixture to form a solid product; and (c) calcining the solid product to form the catalyst, the catalysts prepared by the process, and the use of the catalysts in ammoxidation and oxidation processes. The catalysts of the invention are particularly useful for the production of acrylonitrile from propylene, ammonia, and an oxygen-containing gas.Type: GrantFiled: November 27, 2002Date of Patent: July 12, 2005Assignee: Solutia Inc.Inventor: Cathy L. Tway
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Patent number: 6914150Abstract: An improved catalyst comprising a mixed metal oxide is prepared by the use of a sol-gel technique. The catalyst is useful for the conversion of an alkane, or a mixture of an alkane and an alkene, to an unsaturated carboxylic acid by vapor phase oxidation, or to an unsaturated nitrile by vapor phase oxidation in the presence of ammonia.Type: GrantFiled: August 7, 2003Date of Patent: July 5, 2005Assignee: Rohm and Haas CompanyInventors: Anne Mae Gaffney, Ruozhi Song
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Patent number: 6903047Abstract: The present invention concerns a method for enhancing the activity of vanadium phosphorus oxide (VPO) catalysts. Promoter reagents are grafted onto or reacted with the catalyst surface. An optional calcination and activation heating cycle transforms the catalyst precursor into a final active phase. A preferred VPO catalyst produced has a ratio of molybdenum to vanadium on the surface of the catalyst to molybdenum to vanadium in the overall bulk of the catalyst represented by the equation (Mo/V) Surface?1.10 (Mo/V) overall bulk.Type: GrantFiled: January 16, 2001Date of Patent: June 7, 2005Assignee: E.I. du Pont de Nemours and CompanyInventors: Kostantinos Kourtakis, Pratibha Laxman Gai
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Patent number: 6887825Abstract: Vanadium antimony oxide catalysts useful for the selective oxidation and ammoxidation of paraffins, olefins, and aromatic compounds are manufactured in a process comprising (i) forming a catalyst precursor slurry comprising a vanadium containing compound and an antimony containing compound in a liquid solvent medium which comprises an organic solvent, and (ii) recovering a vanadium antimony oxide from the slurry by drying the slurry in order to remove water and organic solvent.Type: GrantFiled: November 27, 2002Date of Patent: May 3, 2005Assignee: The Standard Oil CompanyInventor: James F. Brazdil
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Patent number: 6884402Abstract: The present invention provides: a catalyst for purification of exhaust gases which catalyst is excellent as a denitrification catalyst which has still more excellent ability to remove nitrogen oxides and of which the ability to oxidize sulfur dioxide into sulfur trioxide is extremely suppressed and further as a catalyst which is favorable for efficiently removing organohalogen compounds, such as dioxins, from exhaust gases; a production process therefor; and a process for purification of exhaust gases. The catalyst for purification of exhaust gases comprises titanium oxide, molybdenum oxide, and vanadium oxide as catalytic components, wherein the titanium oxide and the molybdenum oxide are included in the catalyst in the form of: a binary closely mixed oxide which is beforehand prepared and includes titanium and molybdenum; and/or a trinary closely mixed oxide which is beforehand prepared and includes titanium, silicon, and molybdenum.Type: GrantFiled: March 18, 2003Date of Patent: April 26, 2005Assignee: Nippon Shokubai Co., Ltd.Inventors: Shinyuki Masaki, Ryoji Kuma, Noboru Sugishima
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Patent number: 6881702Abstract: A catalyst suitable for the gas-phase oxidation of organic compounds to ?,?-unsaturated aldehydes and/or carboxylic acids and having an active phase comprising a multimetal oxide material is prepared by a process in which a particulate catalyst precursor which contains oxides and/or compounds of the elements other than oxygen which constitute the multimetal oxide material, which compounds can be converted into oxides, is prepared and said catalyst precursor is converted by calcination into a catalytically active form, wherein a stream of the particulate catalyst precursor is passed at substantially constant speed through at least one calcination zone at constant temperature for calcination.Type: GrantFiled: September 20, 2001Date of Patent: April 19, 2005Assignee: BASF AktiengesellschaftInventors: Heiko Arnold, Signe Unverricht, Raimund Felder, Klaus Harth, Klaus Joachim Müller-Engel
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Patent number: 6878847Abstract: A catalyst useful for catalytic vapor-phase oxidation of isobutylene, t-butanol or propylene to produce respectively corresponding unsaturated aldehyde and unsaturated carboxylic acid is provided. The catalyst consists of ring-formed shaped bodies composed of (i) a catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.Type: GrantFiled: April 20, 2004Date of Patent: April 12, 2005Assignee: Nippon Shokubai Co., Ltd.Inventors: Hiroto Kasuga, Eiichi Shiraishi
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Patent number: 6867163Abstract: A molybdenum-based precipitate is prepared according to a process including the first step of forming a crude precipitate by pH adjustment to 6.5 or less in the presence of an alkali metal compound, and the second step of dissolving the crude precipitate in aqueous ammonia and forming a precipitate by pH adjustment to 6.5 or less. Then, the resulting molybdenum-based precipitate is washed with an acid aqueous solution having a pH of 6.5 or less and containing not less than 0.01 mole/L of ammonium root. Thus, a change in average particle diameter can be suppressed and good workability can be achieved, so that a molybdenum-based precipitate having a high purity and a desired average particle diameter can be obtained.Type: GrantFiled: May 10, 2001Date of Patent: March 15, 2005Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Hideyasu Takezawa, Toru Kuroda, Seiichi Kawato, Masanori Nitta
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Patent number: 6867328Abstract: The invention relates to a method for producing acrylic acid by the heterogeneously catalysed gas-phase oxidation of propane on a multi-metal oxide mass, said mass containing the elements Mo, V, Te and/or Sb and having a specific X-ray diffractogram.Type: GrantFiled: July 16, 2001Date of Patent: March 15, 2005Assignee: BASF AktiengesellschaftInventors: Frieder Borgmeier, Andreas Tenten, Hartmut Hibst, Klaus Joachim Müller-Engel, Signe Unverricht, Gerhard Cox
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Patent number: 6864384Abstract: A process for the manufacture of an improved iron promoted vanadium antimony oxide catalyst useful in the ammoxidation of propane to acrylonitrile wherein the source of iron (i.e. an iron containing compound such as Fe2O3) employed in the catalyst preparation has a BET surface area greater than 120 m2/gram. Such catalysts are useful in processes for the ammoxidation of a C3-C5 paraffinic hydrocarbon to its corresponding ?-?-unsaturated nitrile, the ammoxidation of propylene with NH3 and oxygen to acrylonitrile, the ammoxidation of methylpyridine with NH3 and oxygen to make cyanopyridine, the ammoxidation of m-xylene with NH3 and oxygen to make isophthalonitrile, and the oxidation of o-xylene to make phthalic anhydride.Type: GrantFiled: November 27, 2002Date of Patent: March 8, 2005Assignee: The Standard Oil CompanyInventors: James F. Brazdil, Joseph P. Bartek, Steven S. Trail
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Patent number: 6858754Abstract: Acrylic acid is prepared by heterogeneously catalyzed partial oxidation of propane by a process in which the steam content of the reaction gas starting mixture is reduced in the course of the process.Type: GrantFiled: May 2, 2002Date of Patent: February 22, 2005Assignee: BASF AktiengesellschaftInventor: Frieder Borgmeier
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Patent number: 6858562Abstract: A catalyst of a water insoluble vanadyl sulfate or a complex catalyst, in which a specific oxide and a specific sulfate are combined to the water insoluble vanadyl sulfate are excellent not only in their activity, durability and SO2 resistance, not only in substantially no oxidization of SO2 to SO3 as in HCl resistant. Therefore, using this catalyst, a decomposition treatment of an organic halide(s) can be carried out with high efficiency and good stability. In particular, a efficient decomposition treatment of an organic halides(s) can be carried out also in the cases that dust is coexist; the gas to be treated contains SOX or HCl; or they generate in the decomposition area.Type: GrantFiled: September 27, 2000Date of Patent: February 22, 2005Assignees: Mitsui Chemicals, Inc., UBE Industries, Ltd.Inventors: Isao Takasu, Kenji Fujita
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Patent number: 6841699Abstract: A mixed metal oxide, which may be an orthorhombic phase material, is improved as a catalyst for the production of unsaturated carboxylic acids, or unsaturated nitriles, from alkanes, or mixtures of alkanes and alkenes, by: contacting with a liquid contacting member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide to form a contact mixture; recovering insoluble material from the contact mixture; and calcining the recovered insoluble material in a non-oxidizing atmosphere.Type: GrantFiled: April 8, 2002Date of Patent: January 11, 2005Assignee: Rohm and Haas CompanyInventors: Leonard Edward Bogan, Jr., Anne Mae Gaffney, Scott Han, Michele Doreen Heffner, Ruozhi Song
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Publication number: 20040267048Abstract: The method of producing a catalyst for synthesis of an unsaturated aldehyde and unsaturated carboxylic acid of the present invention is characterized in that the method comprises a step of adding liquid to particles containing molybdenum, bismuth and iron and kneading the mixture, and extrusion-molding this kneaded substance, a step of preserving the molded article obtained by extrusion molding, and at least one step of drying and calcining the preserved molded article, and the contact time of particles containing molybdenum, bismuth and iron with liquid is 1 to 48 hours, and the preserving time of the molded article is 50% or more of the contact time of particles containing molybdenum, bismuth and iron with liquid. According to the production method of the present invention, catalytic activity can be easily controlled, and a catalyst having high activity and high selectivity is obtained.Type: ApplicationFiled: May 18, 2004Publication date: December 30, 2004Inventors: Masahide Kondo, Seiichi Kawato, Toru Kuroda
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Publication number: 20040248734Abstract: An object of the present invention is to provide a method for preparing a catalyst which is useful for synthesis of acrylonitrile due to ammoxidation of organic compounds, especially ammoxidation of propylene.Type: ApplicationFiled: April 1, 2004Publication date: December 9, 2004Inventors: Kenichi Miyaki, Motoo Yanagita, Kunio Mori
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Publication number: 20040248733Abstract: One object of the present invention is to provide a method for producing a molybdenum-bismuth-iron containing, composite oxide fluid bed catalyst, which is useful for an ammoxidation and which produces a target ammoxidation product at high yield and an excellent reproducibility. In order to achieve this object, the present invention provides a method for producing a molybdenum-bismuth-iron containing composite oxide fluid bed catalyst which is used for ammoxidation of organic compounds, comprising the step in that a slurry, which contains the raw materials containing specific elements, is subjected to a concentration treatment at 50-120° C.Type: ApplicationFiled: March 29, 2004Publication date: December 9, 2004Inventors: Yuichi Tagawa, Kenichi Miyaki, Kunio Mori
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Patent number: 6825145Abstract: The present invention provides an exhaust gas purifying catalyst that is capable of substantially reducing the degree of deterioration in an exhaust gas purifying capability, which results from dissipation of an absorbent agent. Accordingly, an exhaust gas purifying catalyst, which includes a carrier and a catalyst layer, and to which at least one material selected from a group of alkali metals and alkali earth metals is added as an absorbent agent, is characterized in that acid material with a high affinity with respect to the absorbent agent is mixed in the catalyst layer so as to fix the absorbent agent, and an inhibiting layer is formed between the catalyst layer and the carrier so as to inhibit the movement of the absorbent agent toward the carrier.Type: GrantFiled: June 2, 2003Date of Patent: November 30, 2004Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Hiroshi Tanada, Osamu Nakayama, Keisuke Tashiro, Kinichi Iwachido, Tetsuya Watanabe, Kazuo Koga
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Patent number: 6825380Abstract: 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 and an alkene to an unsaturated nitrile.Type: GrantFiled: March 12, 2002Date of Patent: November 30, 2004Assignee: Rohm and Haas CompanyInventors: Sanjay Chaturvedi, Anne Mae Gaffney, Scott Han, Michele Doreen Heffner, Ruozhi Song
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Patent number: 6818588Abstract: A catalyst comprising a 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 and an alkene to an unsaturated nitrile.Type: GrantFiled: April 4, 2002Date of Patent: November 16, 2004Assignee: Rohm and Haas CompanyInventors: Anne Mae Gaffney, Michele Doreen Heffner, Ruozhi Song
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Publication number: 20040199008Abstract: 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 catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.Type: ApplicationFiled: April 20, 2004Publication date: October 7, 2004Inventors: Hiroto Kasuga, Eiichi Shiraishi
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Publication number: 20040192973Abstract: A catalyst for production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene contains oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals, such as tungsten, cobalt, nickel, antimony, magnesium, zinc and phosphorus. The catalyst has a certain relative amount ratio of cesium to bismuth, a certain relative amount ratio of iron to bismuth and a certain relative amount ratio of bismuth, iron and cesium to molybdenum.Type: ApplicationFiled: March 31, 2003Publication date: September 30, 2004Applicant: Saudi Basic Industries CorporationInventors: Wugeng Liang, Scott A. Stevenson, James W. Kauffman, John S. Ledford, Joseph R. Linzer
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Publication number: 20040192545Abstract: The present invention relates to a method for preparing a catalyst for partial oxidation of propylene, particularly a method for preparing a catalyst for preparing an acrylic acid, using an organic acid such as a citric acid, maleic acid and oxalic acid. The complex oxide catalyst according to the invention, when used in the gas phase catalytic oxidation of propylene, may produce acrolein in high yield.Type: ApplicationFiled: February 11, 2004Publication date: September 30, 2004Inventors: Jung Hwa Kang, Won Ho Lee, Min Ho Kil, Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choe, Ju Yeon Park
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Patent number: 6797839Abstract: Multimetal oxide materials containing molybdenum, vanadium, antimony, one or more of the elements W, Nb, Ta, Cr and Ce and nickel and, if required, one or more of the elements Cu, Zn, Co, Fe, Cd, Mn, Mg, Ca, Sr and Ba and having a 2-component structure are used for the gas-phase catalytic oxidative preparation of acrylic acid.Type: GrantFiled: October 5, 2000Date of Patent: September 28, 2004Assignee: BASF AktiengesellschaftInventors: Hartmut Hibst, Signe Unverricht
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Patent number: 6794539Abstract: In a process for preparing a multiplephase multimetal oxide composition comprising Mo, V, Cu and, if desired, further elements, at least one phase is preformed separately and dispersed in a plastically deformable precursor composition of a further phase. The mixture is dried and calcined. The multimetal oxide composition is suitable as active composition of catalysts for the catalytically oxidation of organic compounds in the gas phase, in particular for the oxidation of acrolein to acrylic acid.Type: GrantFiled: March 17, 2003Date of Patent: September 21, 2004Assignee: BASF AktiengesellschaftInventors: Signe Unverricht, Raimund Felder, Heiko Arnold, Jochen Petzoldt
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Patent number: 6790808Abstract: In an exhaust gas purifying catalyst, an acid material with a high affinity with respect to an absorbing agent is dispersed and mixed in a catalyst layer, to which the absorbing agent is added, or a layer of the acid material is formed inside the catalyst layer in order to prevent the absorbing agent from moving from the catalyst layer into the carrier. This reduces the permeation of the absorbing agent added to the catalyst layer into a carrier, the evaporation and splash of the absorbing agent from the catalyst, and the deterioration in the durability and the exhaust gas purifying performance of the catalyst.Type: GrantFiled: February 12, 2003Date of Patent: September 14, 2004Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Hiroshi Tanada, Osamu Nakayama, Keisuke Tashiro, Kinichi Iwachido, Tetsuya Watanabe
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Patent number: 6784134Abstract: 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 catalyst composition containing at least molybdenum and bismuth as the active ingredients and (ii) inorganic fibers. The catalyst excels in mechanical strength, can give the object products at high yield and shows little activity degradation with time.Type: GrantFiled: March 20, 2002Date of Patent: August 31, 2004Assignee: Nippon Shokubai Co., Ltd.Inventors: Hiroto Kasuga, Eiichi Shiraishi
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Patent number: 6781008Abstract: A mixed metal oxide, which may be an orthorhombic phase material, is improved as a catalyst for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by contact with a liquid contacting member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide.Type: GrantFiled: August 7, 2003Date of Patent: August 24, 2004Assignee: Rohm and Haas CompanyInventor: Leonard Edward Bogan, Jr.
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Patent number: 6777571Abstract: A catalyst comprising a 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 and an alkene to an unsaturated nitrile.Type: GrantFiled: August 7, 2003Date of Patent: August 17, 2004Assignee: Rohm and Haas CompanyInventors: Sanjay Chaturvedi, Anne Mae Gaffney, Ruozhi Song, Elsie Mae Vickery
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Patent number: 6762148Abstract: An object of the present invention is to provide a catalyst that is highly active and has a large mechanical strength. The catalyst of the present invention contains molybdenum, vanadium, copper and antimony as the essential components, being produced by using antimony acetate for an antimony source material and preferably used for producing acrylic acid by vapor-phase catalytic oxidation of acrolein.Type: GrantFiled: December 17, 2002Date of Patent: July 13, 2004Assignee: Nippon Kayaku Kabushiki KaishaInventors: Junzo Ohishi, Masahiro Senyo, Yoshimasa Seo, Hideki Sugi
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Publication number: 20040127746Abstract: The present invention provides novel extrusion-molded catalysts which is suitably usable in the synthesis of an unsaturated aldehyde and an unsaturated carboxylic acid by vapor-phase catalytic oxidation, which are prepared by molding-molding catalyst particles (or powders) comprising at least molybdenum, bismuth and iron as metallic elements participating in its catalytic action on this reaction, and which exhibit high catalytic activity and high selectivity for the unsaturated aldehyde and unsaturated carboxylic acid being desired products. When previously formed catalyst particles are subjected to extrusion molding, the catalyst particles are kneaded, for example, with a &bgr;-1,3-glucan and a liquid. Then, the kneaded material is subjected to an extrusion molding step in which a ceramic material is used for at least a part of the catalyst flow path. Thereafter, the extrusion-molded material is dried, calcined and otherwise treated to obtain a final extrusion-molded catalyst.Type: ApplicationFiled: February 19, 2004Publication date: July 1, 2004Inventors: Masahide Kondo, Seiichi Kawato, Toru Kuroda
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Publication number: 20040116280Abstract: In producing a catalyst used for synthesis of an unsaturated aldehyde and an unsaturated carboxylic acid by a gas-phase catalytic oxidation, there is used a step of packing an additive-containing catalyst precursor of the catalyst into a tubular reactor, passing a gas through the tubular reactor, and elevating, in this state, the temperature of the additive-containing catalyst precursor so that a temperature of the gas at an outlet of the catalyst precursor layer becomes higher than a temperature of the gas at an inlet of the catalyst precursor layer. The step makes possible easy and highly reproducible production of a high-performance catalyst which is small in the reduction in catalytic performance caused by, for example, the thermal decomposition of the additive contained in the catalyst precursor.Type: ApplicationFiled: February 9, 2004Publication date: June 17, 2004Inventors: Seiichi Kawato, Masahide Kondo, Toru Kuroda, Masanori Nitta, Mieji Sugiyama
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Publication number: 20040116284Abstract: A process for making a catalyst containing oxides of molybdenum, bismuth, iron, cesium and, optionally, other metals, such as tungsten, cobalt, nickel, antimony, magnesium, zinc, phosphorus, potassium, rubidium, thallium, manganese, barium, chromium, boron, sulfur, silicon, aluminum, titanium, cerium, tellurium, tin, vanadium, zirconium, lead, cadmium, copper and niobium wherein metal compounds are dissolved and then precipitated as a catalyst precursor which is calcined to form a mixed metal oxide catalyst. The process of the present invention uses an organic acid, such as acetic acid, instead of nitric acid to dissolve the bismuth compound and, optionally, other metal compounds. The catalyst synthesized by this process may be used for the production of unsaturated aldehydes, such as methacrolein, by gas phase catalytic oxidation of olefins, such as isobutylene.Type: ApplicationFiled: December 12, 2002Publication date: June 17, 2004Applicant: Saudi Basic Industries CorporationInventors: Scott A. Stevenson, Wugeng Liang
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Publication number: 20040110978Abstract: A catalyst comprising a complex of catalytic oxides comprising potassium, cesium, cerium, chromium, cobalt, nickel, iron, bismuth, molybdenum, wherein the relative ratios of these elements is represented by the following general formulaType: ApplicationFiled: November 19, 2003Publication date: June 10, 2004Inventors: Christos Paparizos, Stephen C. Jevne, Michael J. Seely
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Publication number: 20040102643Abstract: A process for preparing an antimonate-based mixed metal oxide catalyst in a catalytically active oxidized state, wherein the catalyst is represented by the empirical formula MeaSbbXcQdReOf, wherein Me, X, Q, R, a, b, c, d, e, and f are as defined herein, comprising (a) contacting an aqueous Sb2O3 slurry with HNO3 and one or more Me compounds, and, optionally, one or more compounds selected from X, Q, or R compounds to form a first mixture; (b) heating and drying the first mixture to form a solid product; and (c) calcining the solid product to form the catalyst, the catalysts prepared by the process, and the use of the catalysts in ammoxidation and oxidation processes. The catalysts of the invention are particularly useful for the production of acrylonitrile from propylene, ammonia, and an oxygen-containing gas.Type: ApplicationFiled: November 27, 2002Publication date: May 27, 2004Inventor: Cathy L. Tway
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Patent number: 6740620Abstract: An orthorhombic phase mixed metal oxide is produced selectively in quantitative yield.Type: GrantFiled: April 8, 2002Date of Patent: May 25, 2004Assignee: Rohn and Haas CompanyInventors: Leonard Edward Bogan, Jr., Daniel A. Bors, Fernando Antonio Pessoa Cavalcanti, Michael Bruce Clark, Jr., Anne Mae Gaffney, Scott Han
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Patent number: 6740769Abstract: A process for producing a molybdenum-bismuth-iron-containing metal oxide fluidized bed catalyst which has a controlled particle diameter and has satisfactory activity and physical properties. In a process for producing a fluidized bed catalyst containing molybdenum-bismuth-iron and silica as a carrier component, dried products formed in a spray drying step and having a particle diameter outside a desired range are pulverized, then the pulverized one is mixed into a slurry before spray drying, the resulting mixture is spray-dried, and the spray-dried particles are subjected to a classification operation to obtain particles having a diameter within the desired range, which are then calcined. The catalyst produced according to the present invention is suitable for producing acrylonitrile by ammoxidation of propylene.Type: GrantFiled: January 4, 2002Date of Patent: May 25, 2004Assignee: Mitsubishi Rayon Co., Ltd.Inventors: Kouichi Mizutani, Yoshimi Nakamura, Yutaka Sasaki, Kunio Mori
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Patent number: 6710207Abstract: Unsaturated carboxylic acids are produced by the vapor phase catalytic oxidation of mixtures of alkenes and alkanes in the presence of a catalyst containing a mixed metal oxide. Similarly, unsaturated nitrites are produced by the vapor phase catalytic oxidation of alkenes or mixtures of alkenes and alkanes and ammonia in the presence of a catalyst containing a mixed metal oxide.Type: GrantFiled: September 25, 2001Date of Patent: March 23, 2004Assignee: Rohm and Haas CompanyInventors: Leonard Edward Bogan, Jr., Scott Han, Bradley Anson Jacobs, Frederick William Kaiser, Peter David Klugherz, Manhua Lin, Richard David Link, III., Michael William Linsen
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Publication number: 20040054222Abstract: The invention relates to a method for the heterogenically catalysed gas-phase partial oxidation of precursor compounds of (meth)acrylic acid in a fixed catalyst bed, containing as the catalyst an activated mass of mixed oxide, shaped to form a geometric body. Said geometric body is a geometric base body, into whose surface a cavity is incorporated.Type: ApplicationFiled: July 15, 2003Publication date: March 18, 2004Inventors: Raimund Felder, Signe Unverricht, Heiko Arnold, Jochen Petzoldt
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Publication number: 20040040887Abstract: A composition comprising a promoter and a metal oxide selected from the group consisting of a niobium oxide, a tantalum oxide, and combinations thereof, wherein at least a portion of the promoter is present as a reduced valence promoter and methods of preparing such composition are disclosed. The thus-obtained composition is employed in a desulfurization zone to remove sulfur from a hydrocarbon stream.Type: ApplicationFiled: August 30, 2002Publication date: March 4, 2004Inventors: David E. Simon, Robert W. Morton, Roland Schmidt, Jason J. Gislason, M. Bruce Welch
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Patent number: 6700015Abstract: 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 and an alkene to an unsaturated nitrile.Type: GrantFiled: May 6, 2003Date of Patent: March 2, 2004Assignee: Rohm and Haas CompanyInventors: Sanjay Chaturvedi, Anne Mae Gaffney, Scott Han, Dominique Hung Nhu Le
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Patent number: 6696387Abstract: A catalyst for the production of carbon fibrils and a method for the manufacture of such a catalyst comprising contacting a fibril-forming catalyst or precursors of a fibril-forming catalyst with an effective amount of a surfactant and/or polyol. The improved carbon fibrils or carbon fibril aggregates produced using the catalyst are free of a continuous carbon thermal overcoat, with graphitic layers substantially parallel to the fibril axis, and have a substantially constant diameter from about 1.0 to 100 nanometers. The improved carbon fibrils possess enhanced dispersion in composite materials and provide enhanced electrical conductivity in those materials.Type: GrantFiled: June 2, 1995Date of Patent: February 24, 2004Assignee: Hyperion Catalysis International, Inc.Inventors: David Moy, Asif Chishti
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Publication number: 20040034249Abstract: A catalyst suitable for the gas-phase oxidation of organic compounds to &agr;,&bgr;-unsaturated aldehydes and/or carboxylic acids and having an active phase comprising a multimetal oxide material is prepared by a process in which a particulate catalyst precursor which contains oxides and/or compounds of the elements other than oxygen which constitute the multimetal oxide material, which compounds can be converted into oxides, is prepared and said catalyst precursor is converted by calcination into a catalytically active form, wherein a stream of the particulate catalyst precursor is passed at substantially constant speed through at least one calcination zone at constant temperature for calcination.Type: ApplicationFiled: March 14, 2003Publication date: February 19, 2004Inventors: Heiko Arnold, Signe Unverricht, Raimund Felder, Klaus Harth, Klaus Joachim Muller-Engel
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Patent number: 6693059Abstract: A process useful for the catalytic gas phase oxidation of alkanes to unsaturated aldehydes or carboxylic acids uses catalysts of particular compositions formed in a particular manner.Type: GrantFiled: January 4, 2001Date of Patent: February 17, 2004Assignee: Rohm and Haas CompanyInventor: Manhua Lin
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Publication number: 20040029725Abstract: A mixed metal oxide, which may be an orthorhombic phase material, is improved as a catalyst for the production of unsaturated carboxylic acids, or unsaturated nitrites, from alkanes, or mixtures of alkanes and alkenes, by: contacting with a liquid contact member selected from the group consisting of organic acids, alcohols, inorganic acids and hydrogen peroxide to form a contact mixture; recovering insoluble material from the contact mixture; calcining the recovered insoluble material in a non-oxidizing atmosphere; admixing the calcined recovered insoluble material with (i) at least one promoter element or compound thereof and (ii) at least one solvent for the at least one promoter element or compound thereof; removing the at least one solvent to form a catalyst precursor; and calcining the catalyst precursor.Type: ApplicationFiled: August 7, 2003Publication date: February 12, 2004Inventors: Anne Mae Gaffney, Michele Doreen Heffner, Ruozhi Song
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Publication number: 20040030202Abstract: A catalyst comprising a 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 and an alkene to an unsaturated nitrile.Type: ApplicationFiled: August 7, 2003Publication date: February 12, 2004Inventors: Sanjay Chaturvedi, Anne Mae Gaffney, Ruozhi Song, Elsie Mae Vickery
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Patent number: 6686310Abstract: This invention concerns novel compositions, useful as hydrogenation catalyst, said compositions comprising metals and metal ions such as ruthenium (Ru) or palladium (Pd) dispersed in and distributed throughout a matrix comprising an inorganic or silicon oxide network. The catalyst may be prepared by the sol-gel method; a solution of at least one catalytic metal compound is added to a solution of at least one metal alkoxide selected from Al, Ti, Nb, Zr, Ta, Si and other inorganic alkoxides, and then gelling the mixture. Promotors such as rhenium (Re), molybdenum (Mo) and tin (Sn) may be added. The catalyst may be used in the reduction of metallic acid or gamma-butyrolactone to tetrahydrofuran (THF) and 1,4-butanediol (BDO).Type: GrantFiled: June 28, 2001Date of Patent: February 3, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Kostantinos Kourtakis, Daniel Campos, Leo Ernest Manzer