Of Chromium Patents (Class 502/319)
  • Patent number: 7749938
    Abstract: A catalyst for nitrogen oxide removal, which catalytically reduces nitrogen oxides in an exhaust gas in the presence of ammonia, comprises: a first component comprising an oxide of titanium, an oxide of tungsten, and an oxide of vanadium; and a second component comprising an oxide of manganese, or an oxide of manganese and an oxide of copper.
    Type: Grant
    Filed: September 19, 2007
    Date of Patent: July 6, 2010
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yoshiaki Obayashi, Akira Hattori, Masanori Demoto
  • Patent number: 7736404
    Abstract: Methanol steam reforming catalysts, and steam reformers and fuel cell systems incorporating the same. In some embodiments, the methanol steam reforming catalyst includes zinc oxide as an active component. In some embodiments, the methanol steam reforming catalyst further includes at least one of chromium oxide and calcium aluminate. In some embodiments, the methanol steam reforming catalyst is not pyrophoric. Similarly, in some embodiments, steam reformers including a reforming catalyst according to the present disclosure may include an air-permeable or air-accessible reforming catalyst bed. In some embodiments, the methanol steam reforming catalyst is not reduced during use. In some embodiments, the methanol reforming catalysts are not active at temperatures below 275° C. In some embodiments, the methanol steam reforming catalyst includes a sulfur-absorbent material. Steam reformers, reforming systems, fuel cell systems and methods of using the reforming catalysts are also disclosed.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: June 15, 2010
    Assignee: IdaTech, LLC
    Inventor: Curtiss Renn
  • Publication number: 20100120610
    Abstract: A photocatalytic device for reacting with volatile organic compounds includes a photocatalyst and at least one additive, such as hafnium oxide and zirconium oxide, that is capable of forming a stable silicate with silicon dioxide. The additive reacts with volatile silicon-containing compounds to form stable silicate compounds. As a result, the silicon-containing compounds are unavailable for deactivation of the photocatalyst.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 13, 2010
    Applicant: CARRIER CORPORATION
    Inventors: Wayde R. Schmidt, Treese Campbell-Hugener, Tania Bhatia
  • Patent number: 7713908
    Abstract: A method of producing a porous composite metal oxide comprising the steps of: dispersing first metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, in a dispersion medium by use of microbeads each with a diameter of not larger than 150 ?m, thus obtaining first metal oxide particles, which are 1 nm to 50 nm in average particle diameter, and not less than 80% by mass of which are not larger than 75 nm in diameter; dispersing and mixing up, in a dispersion medium, the first metal oxide particles and second metal oxide powder, which is an aggregate of primary particles each with a diameter of not larger than 50 nm, and which is not larger than 200 nm in average particle diameter, thus obtaining a homogeneously-dispersed solution in which the first metal oxide particles and second metal oxide particles are homogeneously dispersed; and drying the homogeneously-dispersed solution, thus obtaining a porous composite metal oxide.
    Type: Grant
    Filed: August 29, 2005
    Date of Patent: May 11, 2010
    Assignee: Kabushiki Kaisha Toyota Chuo Kenkyusho
    Inventors: Toshio Yamamoto, Akihiko Suda, Akira Morikawa, Kae Yamamura, Hirotaka Yonekura
  • Patent number: 7695611
    Abstract: Compositions for reduction of NOx emissions generated during catalytic cracking process, preferably, a fluid catalytic cracking process, are disclosed. The compositions comprise (i) an acidic metal oxide containing substantially no zeolite, (ii) an alkali metal, alkaline earth metal, and mixtures thereof, (iii) an oxygen storage component, (iv) palladium and (v) a noble metal component, preferably platinum, rhodium or iridium, and mixtures thereof. Preferably, the compositions are used as separate additives particles circulated along with the circulating FCC catalyst inventory. Reduced content of NOx in an effluent off gas of a full or complete combustion FCC regenerator are accomplished while simultaneously promoting the combustion of CO.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: April 13, 2010
    Assignee: W. R. Grace & Co.—Conn.
    Inventors: George Yaluris, John Rudesill
  • Publication number: 20100075840
    Abstract: New methods for activating chromium catalysts for polymerization processes decrease the amount of time required for activation and increase catalyst activity. Rapid heating to a first temperature is followed by a first hold period before heating to a higher second temperature and maintaining the second temperature for a second hold period. In one aspect, the overall activation process takes less than 10 hours.
    Type: Application
    Filed: September 23, 2009
    Publication date: March 25, 2010
    Applicant: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Elizabeth A. Benham
  • Patent number: 7662195
    Abstract: Methanol steam reforming catalysts, and steam reformers and fuel cell systems incorporating the same. In some embodiments, the methanol steam reforming catalyst includes zinc oxide as an active component. In some embodiments, the methanol steam reforming catalyst further includes at least one of chromium oxide and calcium aluminate. In some embodiments, the methanol steam reforming catalyst is not pyrophoric. Similarly, in some embodiments, steam reformers including a reforming catalyst according to the present disclosure may include an air-permeable or air-accessible reforming catalyst bed. In some embodiments, the methanol steam reforming catalyst is not reduced during use. In some embodiments, the methanol reforming catalysts are not active at temperatures below 275° C. In some embodiments, the methanol steam reforming catalyst includes a sulfur-absorbent material. Steam reformers, reforming systems, fuel cell systems and methods of using the reforming catalysts are also disclosed.
    Type: Grant
    Filed: June 23, 2006
    Date of Patent: February 16, 2010
    Assignee: Idatech, LLC
    Inventor: Curtiss Renn
  • Patent number: 7662742
    Abstract: A method for producing a catalyst containing given atoms in a given atomic proportion for use in producing methacrylic acid through gas-phase catalytic oxidation of methacrolein with molecular oxygen comprising the steps of: (i) preparing a solution or slurry containing at least molybdenum, phosphorus, and vanadium (liquid I); (ii) preparing a solution or slurry containing ammonium radical (liquid II); (iii) preparing a mixture of the liquid I and the liquid II by introducing one liquid (liquid PR) of the liquid I and the liquid II into a tank (tank A) and pouring the other liquid (liquid LA) on a continuous region in the surface of the liquid PR, the continuous region occupying 0.01 to 10% of the whole area of the surface of the liquid PR; and (iv) drying and calcining the resultant solution or slurry containing a catalyst precursor comprising all the catalyst constituents.
    Type: Grant
    Filed: October 27, 2004
    Date of Patent: February 16, 2010
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroyuki Naitou, Takashi Karasuda, Tomoki Fukui
  • Patent number: 7655749
    Abstract: Methods for synthesizing dimeric or higher polymeric reaction products of nitrogen aromatics comprise contacting a composition comprising the nitrogen aromatic with a catalyst composition. The catalyst is in particulate form and comprises a first metal substrate having a second reduced metal coated on the substrate.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: February 2, 2010
    Assignee: GM Global Technology Operations, Inc.
    Inventors: Andrew M. Mance, Tao Xie, Belabbes Merzougui, Charlene A. Hayden
  • Patent number: 7648940
    Abstract: This invention relates to a catalyst composition of the formula: where Z—O is a support material, where O is oxygen, preferably Z is Si, Ti, Al, Sn, Fe, Ga, Zr, B, Mg, or Cr; each X is, independently, N, O, P or S; each n is, independently, 1 or 2; each R is, independently, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group, provided at least one R group is an aryl or substituted aryl group. This invention also relates to the use of the above catalyst compound with an aluminum alkyl to polymerize olefins and other monomers.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: January 19, 2010
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Matthew W. Holtcamp, Renuka N. Ganesh
  • Publication number: 20100009843
    Abstract: Processes for purifying silicon tetrafluoride source gas by subjecting the source gas to one or more purification processes including: contacting the silicon tetrafluoride source gas with an ion exchange resin to remove acidic contaminants, contacting the silicon tetrafluoride source gas with a catalyst to remove carbon monoxide, by removal of carbon dioxide by use of an absorption liquid, and by removal of inert compounds by cryogenic distillation; catalysts suitable for removal of carbon monoxide from silicon tetrafluoride source gas and processes for producing such catalysts.
    Type: Application
    Filed: September 21, 2009
    Publication date: January 14, 2010
    Applicant: MEMC ELECTRONIC MATERIALS, INC.
    Inventors: Vithal Revankar, Jameel Ibrahim
  • Publication number: 20100009844
    Abstract: Processes for purifying silicon tetrafluoride source gas by subjecting the source gas to one or more purification processes including: contacting the silicon tetrafluoride source gas with an ion exchange resin to remove acidic contaminants, contacting the silicon tetrafluoride source gas with a catalyst to remove carbon monoxide, by removal of carbon dioxide by use of an absorption liquid, and by removal of inert compounds by cryogenic distillation; catalysts suitable for removal of carbon monoxide from silicon tetrafluoride source gas and processes for producing such catalysts.
    Type: Application
    Filed: September 21, 2009
    Publication date: January 14, 2010
    Applicant: MEMC ELECTRONIC MATERIALS, INC.
    Inventors: Vithal Revankar, Jameel Ibrahim
  • Patent number: 7641875
    Abstract: A multi-phase catalyst for the simultaneous conversion of oxides of nitrogen, carbon monoxide, and hydrocarbons is provided. A catalyst composition comprising the multi-phase catalyst and methods of making the catalyst composition are also provided. The multi-phase catalyst may be represented by the general formula of CeyLn1-xAx+sMOZ, wherein Ln is a mixture of elements originally in the form of single-phase mixed lanthanides collected from natural ores, a single lanthanide, or a mixture of lanthanides; A is an element selected from a group consisting of Mg, Ca, Sr, Ba, Li, Na, K, Cs, Rb, or any combination thereof; and M is an element selected from the group consisting of Fe, Mn, Cr, Ni, Co, Cu, V, Zr, Pt, Pd, Rh, Ru, Ag, Au, Al, Ga, Mo, W, Ti, or any combination thereof; x is a number defined by 0?x<1.0; y is a number defined by 0?y<10; s is a number defined by 0?s<10; where s=0 only when y>0 and y=0 only when s>0.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: January 5, 2010
    Assignee: Catalytic Solutions, Inc.
    Inventor: Stephen J. Golden
  • Publication number: 20090324468
    Abstract: The present invention pertains to catalyst systems for nitrogen oxide, carbon monoxide, hydrocarbon, and sulfur reactions that are free or substantially free of platinum group metals. The catalyst system of the present invention comprise a substrate and a washcoat, wherein the washcoat comprises at least one oxide solid, wherein the oxide solid comprises one or more selected from the group consisting of a carrier material oxide, a catalyst, and mixtures thereof. The catalyst system may optionally have an overcoat, wherein the overcoat comprises at least one oxide solid, wherein the oxide solid comprises one or more selected from the group consisting of a carrier material oxide, a catalyst, and mixtures thereof. The catalyst comprises one or more selected from the group consisting of a ZPGM transition metal catalyst, a mixed metal oxide catalyst, a zeolite catalysts, or mixtures thereof.
    Type: Application
    Filed: June 27, 2008
    Publication date: December 31, 2009
    Inventors: Stephen J. Golden, Randal Hatfield, Jason Pless, Johnny Ngo, Mann Sakbodin
  • Patent number: 7638459
    Abstract: A layered composition which can be used in various processes has been developed. The composition comprises an inner core such as a cordierite core and an outer layer comprising a refractory inorganic oxide, a fibrous component and an inorganic binder. The refractory inorganic oxide layer can be alumina, zirconia, titania, etc. while the fibrous component can be titania fibers, silica fibers, carbon fibers, etc. The inorganic oxide binder can be alumina, silica, zirconia, etc. The layer can also contain catalytic metals such as gold and platinum plus other modifiers. The layered composition is prepared by coating the inner core with a slurry comprising the refractory inorganic oxide, fibrous component, an inorganic binder precursor and an organic binding agent such as polyvinyl alcohol. The composition can be used in various hydrocarbon conversion processes.
    Type: Grant
    Filed: May 25, 2005
    Date of Patent: December 29, 2009
    Assignee: UOP LLC
    Inventors: Dean E. Rende, James E. Rekoske, Jeffery C. Bricker, Jeffrey L. Boike, Masao Takayama, Kouji Hara, Nobuyuki Aoi
  • Patent number: 7638455
    Abstract: A process for the preparation of a catalyst, which process comprises the steps of: i) mixing an alumina precursor with combustible carbon-containing fibers with a diameter in the range of from 0.5 to 5 ?m and a length of no greater than 100 ?m in an amount in the range of from 20 to 40 wt % based on the total dry mixture; ii) adding nitric acid and water to form an extrudable mass; iii) extruding the mixture to form shaped particles; iv) drying the shaped particles; v) heating the particles in an atmosphere comprising no more than 5 vol % oxygen at a temperature in the range of from 350 to 600° C.; and vi) then heating the particles in a gas mixture comprising at least 12 vol % oxygen at a temperature in the range of from 450 to 600° C.
    Type: Grant
    Filed: March 8, 2007
    Date of Patent: December 29, 2009
    Assignee: Shell Oil Company
    Inventors: Peter Birke, Frank Heinz Goerlitz, Wigbert Gerhard Himmel, Jürgen Hunold, Hans-Heino John
  • Publication number: 20090317308
    Abstract: Catalysts are formulated to resemble a direct ammonia/air fuel cell at short circuit at the nanoscale level to convert ammonia in aqueous solution directly and spontaneously to nitrogen at near or above ambient temperature. The catalyst particle contains a type-A catalyst subparticles for ammonia oxidation to nitrogen, and a type-C catalyst subparticles for oxygen reduction, with the type-A and type-C catalyst subparticles electrically shorted. Advantages realized at the nanoscale level are enhanced conductances for electrons and hydroxyl anions between the neighboring type-A and type-C catalyst subparticles. With the catalysts packed and confined in a catalyst bed in a chemical reactor, the direct conversion of ammonia in an aqueous phase to nitrogen can be carried out continuously for ammonia removal from a water stream in a compact package, and without the high cost arising from constructing and maintaining a bulk electrochemical device, and without the step of exacting the ammonia into gas phase.
    Type: Application
    Filed: June 18, 2009
    Publication date: December 24, 2009
    Inventor: Xiaoming Ren
  • Patent number: 7628968
    Abstract: The present invention is directed to high activity titanium oxide DeNOx catalysts. In preferred embodinents, by depositing vanadium oxide on a titania supported metal oxide such as tungsten oxide, an improved catalyst may be generated. This catalyst may be used in the treatment of exhaust from sources such as automobiles and industrial plants.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: December 8, 2009
    Assignee: Millenium Inorganic Chemicals, Inc.
    Inventors: Steven M Augustine, Guoyi Fu
  • Patent number: 7625834
    Abstract: In a method of producing a catalyst for the production of methacrylic acid, which has a composition of the following formula (1), when mixing 100 parts by mass of a solution or a slurry (liquid A) containing molybdenum atoms, phosphorous atoms and vanadium atoms in which the content of ammonium species is 0 to 1.5 mol relative to 12 mol of the molybdenum atoms, 5 to 300 parts by mass of a solution or a slurry (liquid B) containing 6 to 17 mol of ammonium species relative to 12 mol of the molybdenum atoms contained in the liquid A and a solution or a slurry (liquid C) containing an element Z such as cesium, the liquid B is mixed with the liquid A, the liquid C or a mixture of the liquid A and the liquid C over 0.1 to 15 minutes PaMobVcCudXeYfZgOh??(1).
    Type: Grant
    Filed: July 4, 2003
    Date of Patent: December 1, 2009
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroyuki Naitou, Takashi Karasuda
  • Publication number: 20090285741
    Abstract: The present invention concerns the selective removal of nitrogen oxides (NOx) from gasses. In particular, the invention concerns a process, a catalyst and the use of a catalyst for the selective removal of nitrogen oxides in the presence of ammonia from gases containing a significant amount of alkali metal and/or alkali-earth compounds which process comprises using a catalyst combined of (i) a formed porous superacidic support, said superacidic support having an Hammett acidity stronger than Ho=?12, and (ii) a metal oxide catalytic component deposited on said superacidic support selected from the group consisting of oxides of Fe, Cu, V, Cr, Mn, and any mixtures thereof.
    Type: Application
    Filed: September 25, 2007
    Publication date: November 19, 2009
    Applicant: Technical University of Denmark
    Inventors: Soren Birk Rasmussen, Arkady Kustov, Rasmus Fehmann, Johannes Due-Hansen
  • Patent number: 7598203
    Abstract: Provided are a hydrogenation catalyst for hydrocarbon oil, having markedly improved desulfurization activity, denitrogenation activity, and dearomatization activity; a carrier for the catalyst and its production; and a method of hydrogenation of hydrocarbon oil with the catalyst.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: October 6, 2009
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Narinobu Kagami, Ryuichiro Iwamoto
  • Patent number: 7598204
    Abstract: A reagent suitable for use as a catalyst comprises a first metal species substrate having a second reduced metal species coated thereon, the second reduced metal species being less electropositive than the first metal. Methods of manufacture are also provided.
    Type: Grant
    Filed: September 19, 2005
    Date of Patent: October 6, 2009
    Assignee: General Motors Corporation
    Inventors: Andrew M. Mance, Tao Xie, Belabbes Merzougui
  • Patent number: 7592290
    Abstract: The invention relates to supported catalysts and a process for the production of these catalysts. These supported catalysts may be used in various reactions such as reforming reactions (e.g. steam methane reforming (SMR) reactions and autothermal reforming (ATR) reactions). In one aspect of the invention, the supported catalyst comprises a transition metal oxide; optionally a rare-earth metal oxide; and a transition metal aluminate.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: September 22, 2009
    Assignee: Sulzer Metco(Canada) Inc.
    Inventors: Syed Tajammul Hussain, Eugene Stelmack
  • Publication number: 20090230026
    Abstract: This invention relates to a hydrodesulfurization catalyst, a method for preparing the catalyst, and a method for the preparation of low sulfur gasoline fuel with minimal loss of RON. The catalyst particles include a group VIB metal and a support material having relatively high surface area, and optionally includes one or more group VIIIB metal. The method for preparing the catalyst allows for greater loading of the active metal species on the surface of the support material under aqueous reaction conditions.
    Type: Application
    Filed: February 23, 2009
    Publication date: September 17, 2009
    Inventors: Ki-Hyouk Choi, Sameer Ali Al-Ghamdi, Ali H. Al-Shareef, Ali H. Al-Hamadah
  • Publication number: 20090232728
    Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.
    Type: Application
    Filed: March 14, 2008
    Publication date: September 17, 2009
    Applicant: Sud-Chemie Inc.
    Inventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
  • Patent number: 7589044
    Abstract: A method comprising contacting a donor support with a recipient support to generate a mixture, and heating the mixture to produce a polymerization catalyst, wherein a metal or a metal-containing compound migrates from the donor support to the recipient support. A method comprising contacting a donor support comprising inactive metal species with a recipient support, and mobilizing the inactive metal species from the donor support to form an active metal species on the recipient support.
    Type: Grant
    Filed: October 2, 2007
    Date of Patent: September 15, 2009
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Max P. McDaniel, Kathy S. Collins, Elizabeth A. Benham, William B. Beaulieu
  • Publication number: 20090209415
    Abstract: A composite material includes an aggregate which contains a first metal particle constituting a core and second metal oxide particulates surrounding the first metal particle and having an average primary particle diameter ranging from 1 to 100 nm.
    Type: Application
    Filed: July 20, 2006
    Publication date: August 20, 2009
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Tomoyuki Kayama, Kouzi Banno, Kiyoshi Yamazaki, Koji Yokota
  • Publication number: 20090209412
    Abstract: A method of preparing a steam reforming catalyst characterized by improved resistance to attrition loss when used for cracking, reforming, water gas shift and gasification reactions on feedstock in a fluidized bed reactor, comprising: fabricating the ceramic support particle, coating a ceramic support by adding an aqueous solution of a precursor salt of a metal selected from the group consisting of Ni, Pt, Pd, Ru, Rh, Cr, Co, Mn, Mg, K, La and Fe and mixtures thereof to the ceramic support and calcining the coated ceramic in air to convert the metal salts to metal oxides.
    Type: Application
    Filed: October 7, 2005
    Publication date: August 20, 2009
    Applicant: ALLIANCE FOR SUSTAINABLE ENERGY, LLC
    Inventors: Yves O. Parent, Kim Magrini, Steven M. Landin, Marcus A. Ritland
  • Publication number: 20090198026
    Abstract: A process for the preparation of a chromium-type supported olefin polymerization catalyst. A fluidized bed of support particles in an inert carrier gas is established. A chromium (III) compound is added to the fluidized support particles to provide a supported catalyst component. The supported catalyst component is activated to convert at least a portion of the chromium (III) to Chromium (VI). The chromium (III) containing particles may be recovered from the fluidized bed and then activated or they may be activated in the fluidized bed. Also the support particles can be treated in the fluidized bed with other treatment agents. The support particles may be pretreated with a solution of a boron treating agent prior to incorporation of the support in the fluidized bed.
    Type: Application
    Filed: January 31, 2008
    Publication date: August 6, 2009
    Inventors: Ricky McCormick, David Knoeppel
  • Patent number: 7563743
    Abstract: This invention relates to doped catalysts on an aluminosilicate substrate with a low content of macropores and the hydrocracking/hydroconversion and hydrotreatment processes that use them. The catalyst comprises at least one hydro-dehydrogenating element that is selected from the group that is formed by the elements of group VIB and group VIII of the periodic table and a dopant in a controlled quantity that is selected from among phosphorus, boron, and silicon and a non-zeolitic substrate with a silica-alumina base that contains a quantity of more than 15% by weight and of less than or equal to 95% by weight of silica (SiO2).
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: July 21, 2009
    Assignee: Institute Francais du Petrole
    Inventors: Patrick Euzen, Alexandra Chaumonnot, Carole Bobin, Patrick Bourges, Christophe Gueret, Hugues Dulot
  • Publication number: 20090145808
    Abstract: This invention relates to a hydrodesulfurization catalyst and a method for preparing the catalyst by spray pyrolysis. The catalyst is useful for the hydrodesulfurization of gas oils, particularly diesel. The catalyst particles can include at least one metal selected from molybdenum, cobalt and nickel, and a silicon dioxide support. The spray pyrolysis technique allows for the preparation of catalyst particles having high loading of catalyst on the substrate.
    Type: Application
    Filed: November 24, 2008
    Publication date: June 11, 2009
    Applicant: SAUDI ARABIAN OIL COMPANY
    Inventors: Ki-Hyouk Choi, Isao Mochida
  • Patent number: 7541012
    Abstract: The present invention features a catalytic material which includes a metal catalyst anchored to a nano-sized crystal containing a metal oxide. Furthermore, the present invention features a method of producing the catalytic material described herein. Finally, the present invention features using the catalytic material for removing contaminants and for getting the desired products.
    Type: Grant
    Filed: July 7, 2004
    Date of Patent: June 2, 2009
    Assignee: The Hong Kong University of Science and Technology
    Inventors: King Lun Yeung, Nan Yao, Ka Yee Ho
  • Publication number: 20090114061
    Abstract: A method of producing de-alloyed nanoparticles. In an embodiment, the method comprises admixing metal precursors, freeze-drying, annealing, and de-alloying the nanoparticles in situ. Further, in an embodiment de-alloyed nanoparticle formed by the method, wherein the nanoparticle further comprises a core-shell arrangement. The nanoparticle is suitable for electrocatalytic processes and devices.
    Type: Application
    Filed: September 8, 2008
    Publication date: May 7, 2009
    Applicant: UNIVERSITY OF HOUSTON
    Inventors: Peter Strasser, Shirlaine Koh, Prasanna Mani, Srivastava Ratndeep
  • Patent number: 7527776
    Abstract: A catalyst and a method for selectively reducing nitrogen oxides with ammonia are provided. The catalyst includes a first component of copper, chromium, cobalt, nickel, manganese, iron, niobium, or mixtures thereof, a second component of cerium, a lanthanide, a mixture of lanthanides, or mixtures thereof, and a zeolite. The catalyst may also include strontium as an additional second component. The catalyst and the method may have special application to selective reduction of nitrogen oxides in exhaust gas from diesel vehicles, although the catalyst and the method have broad application to a wide range of gas streams that contain nitrogen oxides.
    Type: Grant
    Filed: January 9, 2007
    Date of Patent: May 5, 2009
    Assignee: Catalytic Solutions, Inc.
    Inventors: Stephen J. Golden, Svetlana Iretskaya
  • Publication number: 20090105069
    Abstract: A structure having strong contact with solid particles comprising an assembly formed by secondary aggregation which is further aggregation of aggregates each formed by primary aggregation of primary particles each made of a metal and/or a metal oxide, wherein an average primary particle diameter of the primary particles is in a range from 1 to 100 ?m, and, among void pores formed by the aggregates, a volume of void pores having pore diameters in a range within ±50% away from an average void pore diameter of the void pores is equal to or above 60% of a total volume of the void pores.
    Type: Application
    Filed: March 27, 2007
    Publication date: April 23, 2009
    Applicant: KABUSHIKI KAISHA TOYOTA CHUO KENKYUSHO
    Inventors: Tomoyuki Kayama, Kouzi Banno
  • Publication number: 20090092534
    Abstract: Processes for purifying silicon tetrafluoride source gas by subjecting the source gas to one or more purification processes including: contacting the silicon tetrafluoride source gas with an ion exchange resin to remove acidic contaminants, contacting the silicon tetrafluoride source gas with a catalyst to remove carbon monoxide, by removal of carbon dioxide by use of an absorption liquid, and by removal of inert compounds by cryogenic distillation; catalysts suitable for removal of carbon monoxide from silicon tetrafluoride source gas and processes for producing such catalysts.
    Type: Application
    Filed: September 11, 2008
    Publication date: April 9, 2009
    Applicant: MEMC Electronic Materials, Inc.
    Inventors: Vithal Revankar, Jameel Ibrahim
  • Publication number: 20090088317
    Abstract: A reduction catalyst having a first metal component comprising one of Co, Os, Fe, Re, Rh and Ru. The first metal component is present in the catalyst at from 0.5 percent to 20 percent, by weight. A second metal component differing from the first metal component present in the catalyst with the second metal component being selected from the group consisting of Fe, Mn, Ru, Os, Rh, Ir, Ni, Pd, Pt, Ag, Au, Zn, Co, Re, Cu, Pb, Cr, W, Mo, Sn, Nb, Cd, Te, V, Bi, Ga and Na. A hydrogenation catalyst comprising one or both of Ni and Co and one or more elements selected from the group consisting of Mn, Fe, Ag, Au, Mo and Rh.
    Type: Application
    Filed: September 28, 2007
    Publication date: April 2, 2009
    Inventors: John G. Frye, JR., Johnathan E. Holladay, Danielle S. Muzatko, James F. White, Alan H. Zacher
  • Patent number: 7507690
    Abstract: The invention addressed two critical issues in fuel processing for fuel cell application, i.e. catalyst cost and operating stability. The existing state-of-the-art fuel reforming catalyst uses Rh and platinum supported over refractory oxide which add significant cost to the fuel cell system. Supported metals agglomerate under elevated temperature during reforming and decrease the catalyst activity. The catalyst is a perovskite oxide or a Ruddlesden-Popper type oxide containing rare-earth elements, catalytically active firs row transition metal elements, and stabilizing elements, such that the catalyst is a single phase in high temperature oxidizing conditions and maintains a primarily perovskite or Ruddlesden-Popper structure under high temperature reducing conditions. The catalyst can also contain alkaline earth dopants, which enhance the catalytic activity of the catalyst, but do not compromise the stability of the perovskite structure.
    Type: Grant
    Filed: April 27, 2004
    Date of Patent: March 24, 2009
    Assignee: UChicago Argonne, LLC.
    Inventors: Michael Krumpelt, Di-Jia Liu
  • Patent number: 7504358
    Abstract: A crystalline alpha-chromium oxide where from about 0.05 atom % to about 2 atom % of the chromium atoms in the alpha-chromium oxide lattice are substituted by nickel atoms, and optionally, additional chromium atoms in the alpha-chromium oxide lattice are substituted by trivalent cobalt atoms (provided that the total amount of the nickel atoms and the trivalent cobalt atoms in the alpha-chromium oxide lattice is no more than 6 atom %) is disclosed. Also disclosed is a chromium-containing catalyst composition comprising as a chromium-containing component the crystalline substituted alpha-chromium oxide; and a method for preparing a composition comprising the crystalline substituted alpha-chromium oxide.
    Type: Grant
    Filed: August 21, 2003
    Date of Patent: March 17, 2009
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Velliyur Nott Mallikarjuna Rao, H. David Rosenfeld, Allen C. Sievert, Shekhar Subramoney, Munirpallam Appadorai Subramanian
  • Publication number: 20090048097
    Abstract: Process for the preparation of an oxidic catalyst composition consisting of one or more trivalent metals preferably aluminum, one or more divalent metals preferably magnesium and more than 18 wt % of one or more compounds selected from the group consisting of rare earth metal compounds, phosphorus compounds, and transition metal compounds, which process comprises the steps of preparing a precursor mixture consisting of (i) or more trivalent metal compounds, (ii) one or more divalent metal compounds, (iii) one or more compounds selected from the group consisting of rare earth metal compounds, and transition metal compounds, and (iv) optionally water, which precursor mixture is not a solution. The resulting oxidic catalyst composition is suitable as a metal trap and SOx sorbent FCC processes.
    Type: Application
    Filed: December 6, 2004
    Publication date: February 19, 2009
    Applicant: AKZO NOBEL N.V.
    Inventors: William Jones, Dennis Stamires, Paul O'Connor, Michael Brady
  • Patent number: 7491676
    Abstract: The present invention is directed to high activity titanium oxide DeNOx catalysts. In preferred embodiments, by depositing vanadium oxide on a titania supported metal oxide such as tungsten oxide, an improved catalyst may be generated. This catalyst may be used in the treatment of exhaust from sources such as automobiles and industrial plants.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: February 17, 2009
    Assignee: Millennium Inorganic Chemicals
    Inventors: Steven M. Augustine, Guoyi Fu
  • Patent number: 7491860
    Abstract: A process for adiabatic, non-oxidative dehydrogenation of hydrocarbons including passing a hydrocarbon feed stream through a catalyst bed, wherein the catalyst bed includes a first layer of a catalyst and second layer of a catalyst, wherein the catalyst of the first layer has high activity but a higher capacity for producing coke than the catalyst of the second layer and the second catalyst also has high activity but a lower capacity for producing coke than the catalyst of the first layer.
    Type: Grant
    Filed: August 3, 2005
    Date of Patent: February 17, 2009
    Assignee: Süd-Chemie Inc.
    Inventors: Vladimir Fridman, Michael Urbancic, Andrzej Rokicki
  • Patent number: 7491673
    Abstract: The present invention provides a method for producing a catalyst comprising an inert carrier an a mixed metal oxide as a catalytically active component supported on the inert carrier, the method comprising the steps of: a) adding organic acid(s) into solvent(s) and salt of each metal component which will form a mixed metal oxide, to prepare a catalyst precursor solution for the mixed metal oxide; b) adjusting pH of the catalyst precursor solution using a basic solution; c) containing the catalyst precursor solution for the mixed metal oxide, of which the pH is adjusted, on the inert carrier, d) removing the solvent(s); and e) calcining the resultant from step d. The catalyst produced by the present method has improved reproducibility, activity and yield, while maintaining a high selectivity.
    Type: Grant
    Filed: July 11, 2003
    Date of Patent: February 17, 2009
    Assignee: LG Chem, Ltd.
    Inventors: Jung Hwa Kang, Won Ho Lee, Min Ho Kil, Hyun Jong Shin, Byung Yul Choi, Yeon Shick Yoo, Young Hyun Choi, Ju Yeon Park
  • Publication number: 20090036296
    Abstract: A catalyst for use in the Fischer-Tropsch process, and a method to prepare the catalyst is disclosed. The catalyst of the present invention has a higher surface area, more uniform metal distribution, and smaller metal crystallite size than Fischer-Tropsch catalysts of the prior art.
    Type: Application
    Filed: June 20, 2008
    Publication date: February 5, 2009
    Inventors: X.D. Hu, Patrick J. Loi, Robert J. O'Brien
  • Patent number: 7485597
    Abstract: A method for improving the selectivity of a supported highly selective epoxidation catalyst comprising silver in a quantity of at most 0.17 g per m2 surface area of the support, which method comprises contacting the catalyst, or a precursor of the catalyst comprising the silver in cationic form, with a feed comprising oxygen at a catalyst temperature above 250° C. for a duration of up to 150 hours, and subsequently decreasing the catalyst temperature to a value of at most 250° C.; and a process for the epoxidation of an olefin, which process comprises contacting a supported highly selective epoxidation catalyst comprising silver in a quantity of at most 0.17 g per m2 surface area of the support, or a precursor of the catalyst comprising the silver in cationic form, with a feed comprising oxygen at a catalyst temperature above 250° C. for a duration of up to 150 hours, and subsequently decreasing the catalyst temperature to a value of at most 250° C.
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: February 3, 2009
    Assignee: Shell Oil Company
    Inventors: John Robert Lockemeyer, Randall Clayton Yeates, Donald Reinalda
  • Patent number: 7485596
    Abstract: The present invention is for a process for making a heteropoly acid compound catalyst for oxidation of unsaturated aldehydes, such as methacrolein, to unsaturated carboxylic acids, such as methacrylic acid, said catalyst containing oxides of molybdenum, phosphorus, and M?, wherein M? is cesium, potassium, rubidium, or sodium, and bismuth. The process is a synthesis of the catalyst with specific process conditions for addition of the bismuth compound as an aqueous slurry without nitric acid. A catalyst precursor is formed by removing the water and drying the solid particles. The heteropoly acid compound catalyst is formed by calcination of the catalyst precursor.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: February 3, 2009
    Assignee: Saudi Basic Industries Corporation
    Inventors: James W. Kauffman, Lixia Cai, Wugeng Liang
  • Publication number: 20090019770
    Abstract: A catalytic element useful for promoting catalytic gas phase reactions is provided, comprising a porous ceramic body comprising a multiplicity of open pores having a coating comprising a basic oxide material and a catalyst material selected from transition metal and noble metal compounds
    Type: Application
    Filed: July 21, 2008
    Publication date: January 22, 2009
    Applicant: PALL CORPORATION
    Inventors: Manfred Nacken, Steffen Heidenreich
  • Publication number: 20090011925
    Abstract: A catalytically active glass-ceramic and method for producing a catalytically active multi-phase glass-ceramic in which at least one catalyst precursor is mixed with a glass-ceramic precursor formulation to form a catalyst precursor/glass-ceramic precursor mixture. The catalyst precursor/glass-ceramic precursor mixture is then melted to form an amorphous glass material which, in turn, is devitrified to form a polycrystalline ceramic. The polycrystalline ceramic is then activated, forming a catalytically active multi-phase glass-ceramic.
    Type: Application
    Filed: July 6, 2007
    Publication date: January 8, 2009
    Inventors: Larry Gordon Felix, David Morrissey Rue, Thomas Philip Seward, III, Logan Edwin Weast
  • Publication number: 20080312070
    Abstract: The invention relates to a method for forming a material of a metal oxide supported on a support particle by the steps of. a) providing a precursor mixture comprising a solution containing one or more metal cations and (i) a surfactant; or (ii) a hydrophilic polymer; with the precursor mixture further including support particles; and b) treating the precursor mixture from (a) above by heating to remove the surfactant or hydrophilic polymer and form metal oxide having nano-sized grains, wherein at least some of the metal oxide formed in step (b) is deposited on or supported by the support particles and the metal oxide has an oxide matrix that includes metal atoms derived solely from sources other than the support particles.
    Type: Application
    Filed: May 5, 2006
    Publication date: December 18, 2008
    Inventors: Peter Cade Talbot, Geoffrey Alan Edwards, Jose Antonio Alarco
  • Publication number: 20080305948
    Abstract: A method for producing a catalytically-active material having at least one base component and at least one catalytically-active component in which the at least one base component is heated to a softening or melting temperature to form a softened or molten base component. While the base component is in the softened or molten state, at least one catalytically-active component is incorporated into or onto the base component, forming the catalytically-active material. In accordance with one embodiment, a catalyst precursor is introduced into the base component and subsequently transformed to a catalytically-active component.
    Type: Application
    Filed: August 13, 2008
    Publication date: December 11, 2008
    Applicant: GAS TECHNOLOGY INSTITUTE
    Inventors: Larry Gordon Felix, David M. Rue, Rachid B. Slimane