Abstract: A catalyst comprising a preshaped porous support material having applied thereto in finely divided form an active compound chosen from at least one compound of vanadium, chromium, manganese, iron, cobalt, nickel, copper and zinc, and optionally a promoter chosen from a least an alkali or alkaline earth metal metal compound, method for the preparation thereof and use thereof in the dehydrogenation of hydrocarbons.
Type:
Grant
Filed:
April 21, 1992
Date of Patent:
November 2, 1993
Assignee:
The Dow Chemical Company
Inventors:
Frederik R. Van Buren, Dick E. Stobbe, John W. Geus, Adrianus J. Van Dillen
Abstract: This invention relates to improved catalysts for the oxidation of carbon monoxide and methods of preparing these catalysts. The catalysts of this invention are prepared using a sequential precipitation process which generates catalysts that contain substantially layered metal oxides, both supported and unsupported, and, in some embodiments of the invention, a noble metal or mixture of noble metals layered on the metal oxides. These catalysts are particularly useful in smoking articles.
Abstract: This invention is a graded catalyst comprising palladium and also a partial combustion process in which the fuel is partially combusted using that catalyst. The catalyst utilizes a catalytic support structure suitable for high flow rates of combustible gas mixtures through it. The catalyst is situated on the support so that in the flowing gas stream a leading portion of the support has a higher combustion activity, such as by a higher concentration of catalytic metal, than has the trailing portion. The combination of graded catalyst and support provides a low "light off" temperature for the combustible gas (only a low preheat temperature is needed to cause the combustion reaction to begin) and yet does not cause "hot spots" to occur because of excess activity. The combustion gas produced by the catalytic process may be at a temperature below the adiabatic combustive temperature, may be used at that temperature, or fed to other combustion stages for further use in a gas turbine, furnace, boiler, or the like.
Abstract: A stable one package etch-resistant film-forming composition is disclosed. The composition includes a polyepoxide component having an epoxy equivalent weight on resin solids of less than about 600. The composition further includes a polyacid curing agent having an average acid functionality of greater than 2. The composition is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.degree. C., and is stable for use as a single-component composition. Also disclosed is a process for applying a color-plus-clear composite coating to a substrate which includes applying a acid-catalyzed thermosetting film-forming composition to a substrate to form a basecoat. The process also comprises applying a stable etch-resistant film-forming composition to the basecoat which includes a polyepoxide and a polyacid curing agent as described above, wherein the topcoat is substantially free of basic esterification catalyst, has a cured softening point of greater than about 20.
Type:
Grant
Filed:
November 13, 1992
Date of Patent:
October 26, 1993
Assignee:
PPG Industries, Inc.
Inventors:
Susan U. McMonigal, Debra L. Singer, Dennis A. Simpson, Joseph A. Klanica, Michael A. Mayo
Abstract: A method of forming a methanol synthesis catalyst precursor comprises forming a precipitate comprising compounds, thermally decomposable to oxides or mixed oxides, of copper, zinc, aluminum and at least one element of Group IVB and/or Group VIIB of the Periodic Table of Elements.
Abstract: A catalyst composition suitable for three-way conversion of internal combustion engine, e.g., automobile gasoline engine, exhaust gases includes a catalytic material disposed in on a carrier. The catalytic material contains a co-formed (e.g., co-precipitated) rare earth oxide-zirconia support on which a first rhodium catalytic component is dispersed, and an alumina support having a platinum catalytic component dispersed thereon. The catalytic material may also include a second rhodium catalytic component dispersed on the alumina support bearing the platinum or a second alumina support. The catalytic material may be disposed as a catalytic coating directly on the carrier or upon an optional undercoat which is disposed on the carrier and which includes alumina and optionally, ceria and/or, iron oxide.
Type:
Grant
Filed:
October 11, 1991
Date of Patent:
October 19, 1993
Assignee:
Engelhard Corporation
Inventors:
Chung-Zong Wan, Samuel J. Tauster, Harold N. Rabinowitz
Abstract: This invention is a catalyst structure having integral heat exchange surfaces and a method for using the structure in highly exothermic processes, such as a combustion process, while maintaining the catalyst and the structure wall at a temperature below the adiabatic combustion temperature.
Abstract: The present invention provides an electroless process for making a catalyst in a liquid or gaseous medium comprising contacting a base metal with a chemical cleaning agent and simultaneously or sequentially treating said base metal under reducing conditions with a noble metal-containing material, the catalyst prepared using the process, and a method of using the catalyst.
Type:
Grant
Filed:
December 24, 1991
Date of Patent:
October 5, 1993
Assignee:
Union Carbide Chemicals & Plastics Technology Corporation
Inventors:
James S. Ritscher, Wei T. Yang, George M. Omietanski, Robert L. Ocheltree, Earl E. Malson
Abstract: A catalyst for the purification of exhaust gas comprises a combination of palladium carried on cerium oxide and palladium carried on alumina, or further rhodium carried on alumina, in which a weight ratio of palladium carried on cerium oxide to palladium carried on alumina is 2:8-8:2. Preferably, the cerium oxide contains at least one of zirconium, lanthanum, neodymium and praseodymium, or the alumina contains at least one of zirconium, lanthanum, neodymium, cerium, strontium and barium. This catalyst develops excellent purification performances against exhaust gas of oxidizing atmosphere to reducing atmosphere.
Abstract: This invention relates to a hydrorefining catalyst containing ruthenium sulphide and cobalt and/or nickel sulphide on a refractory oxides support. These catalysts are only very slightly inhibited by polyaromatic compounds or hydrogen sulphide.
Type:
Grant
Filed:
June 25, 1992
Date of Patent:
September 28, 1993
Assignee:
Elf France
Inventors:
Michele Breysse, Jacek Orlewski, Thierry des Courieres, Michel Vrinat
Abstract: A chloride-free catalyst for wash-and-wear finishing textiles with formaldehyde-free crosslinking agents contains magnesium and fluoroborate ions in a ratio of from 1:0.1 to 1:4 and guarantees odorless results.
Abstract: A process for the catalytic hydrodesulfurization of hydrocarbon- containing feeds using a catalyst of a phosphorus component, a cobalt component and a Group VIB metal component on an alumina carrier.
Type:
Grant
Filed:
August 2, 1991
Date of Patent:
September 21, 1993
Assignee:
Akzo N.V.
Inventors:
Jacobus J. L. Heinerman, Antonius J. van Hengstum, Menno de Mind
Abstract: Soap bars are prepared by mixing a soap base with a metal oxide coated mica pearlescent pigment, that is strongly colored, or alternately with the colorant added separately to the soap base, so that the soap bars are brightly colored.
Type:
Grant
Filed:
August 14, 1991
Date of Patent:
September 21, 1993
Assignee:
The MEARL Corporation
Inventors:
Erika M. Baumgartner, Philip Greenberg, Harold A. Miller
Abstract: This invention relates to a crystalline synthetic microporous solid containing gallium and phosphorus, whose crystal structure is of the LTA type.After calcination at a temperature above 200.degree. C. the solid obtained can be employed as a catalyst for converting hydrocarbons or as an adsorbent.
Type:
Grant
Filed:
January 31, 1992
Date of Patent:
September 21, 1993
Assignee:
Societe Nationale Elf Aquitaine
Inventors:
Abdallah Merrouche, Joel Patarin, Henri Kessler, Didier Anglerot
Abstract: Stable colorless detergent compositions are provided comprising anionic and/or nonionic surfactant, oxygen bleach and metal sequestering agent. The compositions do not discolor over time or under harsh temperatures.
Abstract: A catalyst composition for the hydrodesulfurization of a hydrocarbon oil, comprising a composite of metal oxides comprising:aluminum; andat least one metal selected from a group consisting of(A) at least one metal belonging to Group VIB of the Periodic Table; and(B) at least one the metal belonging to Group VIII of the Periodic Table;where the at least one metal belonging to Group VIB of the Periodic Table accounts for, in terms of as oxide, from 10 to 60% by weight with respect to the total catalyst, and the at least one metal belonging to Group VIII of the Periodic Table accounts for, in terms of oxide, from 3 to 20% by weight with respect to the total catalyst, and wherein no peak assigned to Y-Al.sub.2 O.sub.3 is present in X-ray diffraction.
Type:
Grant
Filed:
September 24, 1992
Date of Patent:
September 14, 1993
Assignees:
Cosmo Research Institute, Cosmo Oil Co., Ltd.
Abstract: Provided are novel titania comprising anatase titanium dioxide and sodium, potassium, calcium, magnesium, barium, zinc, or magnesium salts of sulfuric or phosphoric acid. The titania of this invention are useful in the pigmentation of oxidizable polymers, while at the same time providing a catalyst system for the photooxidation of said oxidizable polymers.
Abstract: In an exhaust gas disposable catalyst which is a .gamma.-alumina catalyst prepared by sol-gel process, .gamma.-alumina has more than 300 m.sup.2 /g specific surface area and the catalyst element is supported on the .gamma.-alumina and dispersed in pores thereof. The exhaust gas disposable catalyst is obtained by adding the catalyst element as a solution of salt before gelating in sol-gel process.
Abstract: Reticulated ceramic or metal substrate coated with Cobalt compounds, noble metals or mixtures thereof are superior catalysts for the oxidation of ammonia to produce nitric oxide.
Abstract: The present invention relates to rare earth complex oxide combustion catalysts wherein perovskite-type rare earth complex oxide active components are carried on a support using mullite as the main phase. The present invention relates also to a process for preparing a rare earth complex oxide combustion catalyst which comprises impregnating the support with the solution of the metallic ions prepared by the ABO.sub.3 stoichiometry and then drying and calcining it. Furthermore, the present invention relates to the use of the said catalyst as a combustion catalyst for CO in the fluid catalytic cracking (FCC) process of petroleum refining.