Patents Assigned to Engelhard Corporation
  • Patent number: 6662553
    Abstract: A diesel powered vehicle is provided with an SCR system which uses an external reducing reagent to convert NOx emissions in a manner which accounts for the effects of NOx transient emissions on the reducing catalyst. Actual NOx emissions produced by the engine are filtered using a variable NOx time constant in turn correlated to the reductant/NOx storage capacity of the reducing catalyst at its current temperature to account for changes in the SCR system attributed to NOx transient emissions. Catalyst temperature is filtered using a variable catalyst time constant corresponding to current space velocity of the exhaust gas to account for changes in the catalyst temperature attributed to NOx transient emissions. The reductant is metered on the basis of the filtered, corrected NOx concentration applied at a NSR ratio based, in turn, on the filtered, corrected reducing catalyst temperature.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: December 16, 2003
    Assignee: Engelhard Corporation
    Inventors: Joseph A. Patchett, Rudolfus Petrus Verbeek, Karl Richard Grimston, Gary Wayne Rice, John Lawrence Calabrese, Mathijs Van Genderen
  • Patent number: 6656347
    Abstract: Zeolite microsphere FCC catalysts having a novel morphology comprising a macroporous matrix and crystallized zeolite freely coating the walls of the pores of the matrix. The catalysts are formed from microspheres containing a metakaolin and kaolin calcined through its exotherm, the latter calcined kaolin being derived from a kaolin having a high pore volume. Kaolin having a high pore volume can be a pulverized ultrafine kaolin or a kaolin which has been pulverized to have an incipient slurry point less than 57% solids.
    Type: Grant
    Filed: September 20, 2001
    Date of Patent: December 2, 2003
    Assignee: Engelhard Corporation
    Inventors: David M. Stockwell, Randall P. Brown, Stephen H. Brown
  • Publication number: 20030206845
    Abstract: The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved NOx trap catalysts for use in diesel engines as well as lean burn gasoline engines. The sulfur tolerant NOx trap catalyst composites comprise a platinum component, a support, and a NOx sorbent component prepared by hydrothermal synthesis. The NOx sorbent component comprises a first metal oxide and a second metal oxide. The metal in the first metal oxide is selected from the group consisting of aluminum, titanium, zirconium, silicon, and composites thereof, and the metal in the second metal oxide is selected from the group consisting of Group IIA metals, Group III metals, Group IV metals, rare earth metals, and transition metals. The metal in the first metal oxide is different from the metal in the second metal oxide.
    Type: Application
    Filed: April 23, 2003
    Publication date: November 6, 2003
    Applicant: Engelhard Corporation
    Inventors: Joseph H-Z. Wu, Joseph C. Dettling
  • Publication number: 20030207760
    Abstract: A catalytic composition and method of making the same in which a catalytic material has an average pore size distribution sufficiently large to substantially prevent capillary condensation.
    Type: Application
    Filed: May 6, 2003
    Publication date: November 6, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: Fred M. Allen, Patrick W. Blosser, Ronald M. Heck, Jeffrey B. Hoke, Terence C. Poles, John J. Steger
  • Patent number: 6626989
    Abstract: A pearlescent pigment comprising substrate particles having an adherent layer of rutile titanium dioxide thereon is prepared by effecting the deposition of hydrous titanium dioxide on the substrate particles after contacting the particles at elevated pH with titanium tetrachloride.
    Type: Grant
    Filed: May 16, 2002
    Date of Patent: September 30, 2003
    Assignee: Engelhard Corporation
    Inventors: Carmine V. DeLuca, Jr., Louis R. Cerce, Jr.
  • Patent number: 6627212
    Abstract: Ingestible drugs contain an effect pigment.
    Type: Grant
    Filed: June 26, 2001
    Date of Patent: September 30, 2003
    Assignee: Engelhard Corporation
    Inventors: Gabriel E. Uzunian, William Joseph Sullivan
  • Publication number: 20030175192
    Abstract: The present invention relates to a method and a catalyst composite useful for reducing contaminants in exhaust gas streams containing sulfur oxide contaminants. The method for removing NOx and SOx contaminants from a gaseous stream comprises providing a catalyst composite having a downstream section and an upstream section. The downstream section comprises a first support, a first platinum component, and a NOx sorbent component. The upstream section comprises a second support, a second platinum component, and a SOx sorbent component selected from the group consisting of oxides of Mg, Sr, and Ba. In a sorbing period, a lean gaseous stream comprising NOx and SOx is passed through the upstream section to sorb at least some of the SOx contaminants. The downstream section sorbs and abates the NOx in the gaseous stream.
    Type: Application
    Filed: February 4, 2003
    Publication date: September 18, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: Zhicheng Hu, Patrick L. Burk, Shau-Lin F. Chen
  • Patent number: 6616745
    Abstract: A metal oxide-coated mica pearlescent pigment having a coating of copper chromite thereon is provided.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: September 9, 2003
    Assignee: Engelhard Corporation
    Inventors: Samuel F. Narvarti, Mark E. Gall, Thomas V. Edwards, Frank A. Mazzella, William L. Howell, Jr.
  • Patent number: 6616903
    Abstract: Method and apparatus for treating the atmosphere to lower the concentration of pollutants, such as ozone, hydrocarbons, nitrogen oxides, sulfur oxides, carbon monoxide and the like, therein in which ambient air is passed into operative contact with a stationary substrate such as an automobile at rest, a billboard, an air conditioning unit, a transportation tunnel and the like, the stationary substrate having at least one ambient air contacting surface having a pollutant treating composition, such as manganese compounds, copper compounds, platinum group metals and compounds thereof, precious metals, and the like, thereon.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: September 9, 2003
    Assignee: Engelhard Corporation
    Inventors: Terence C. Poles, William G. Rosenberg, John Calcagni
  • Patent number: 6610124
    Abstract: A pressure swing adsorption process for the separation of impurities such as nitrogen and carbon dioxide and recovery of hydrocarbons from a natural gas stream utilizes two separate adsorption systems, the first containing an adsorbent selective for nitrogen, carbon dioxide or both and the second containing a hydrocarbon-selective adsorbent. In the process, the natural gas stream is passed through a first adsorbent to form a product stream enriched with methane and to adsorb nitrogen and/or carbon dioxide and which further co-adsorbs at least a portion of the hydrocarbons contained in the feed stream. The hydrocarbons are recovered by passing a low pressure waste stream from the first pressure swing adsorption stage which contains co-adsorbed nitrogen and/or carbon dioxide and hydrocarbons and directing the waste stream to the second pressure swing adsorption stage to adsorb the hydrocarbons and produce a product stream enriched in nitrogen and/or carbon dioxide.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: August 26, 2003
    Assignee: Engelhard Corporation
    Inventors: William Bachop Dolan, Michael J. Mitariten
  • Publication number: 20030158037
    Abstract: Hydrogen sulfide formation is suppressed by a three-way conversion catalyst having an underlayer and a topcoat overlying the under layer. The under layer is prepared by dispersing a Group IIa metal oxide such as an oxide of magnesium, calcium, barium or strontium on a carrier such as a refractory metal oxide monolith. A topcoat overlying the undercoat is comprised of a three-way conversion catalyst material such as a platinum-group metal catalytic component, e.g., platinum, palladium, rhodium or mixtures thereof.
    Type: Application
    Filed: February 20, 2002
    Publication date: August 21, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: John S. Foong, Harold N. Rabinowitz
  • Patent number: 6602585
    Abstract: A shrinkable iridescent film constitutes an oriented multilayer coextruded iridescent film having at least 10 generally parallel, very thin layers of substantially uniform thickness in which the contiguous adjacent layers are of heat shrinkable thermoplastic resinous material, each of which is heat shrinkable in at least one dimension in the plane of the film, the continuous adjacent layers being substantially uniformly shrinkable so as to have refractive indexes which differ by at least 0.03. The shrinkable film is made by selecting appropriate thermoplastic resinous materials, coextruding them into a thick film and then subjecting the film to orientation below the heat set temperature of the resinous materials.
    Type: Grant
    Filed: September 26, 2001
    Date of Patent: August 5, 2003
    Assignee: Engelhard Corporation
    Inventor: Daniel J. Graney
  • Publication number: 20030136707
    Abstract: A fluid catalytic cracking catalyst made from microspheres that initially contain kaolin, a dispersible boehmite alumina and a sodium silicate or silica sol binder. The kaolin portion contains hydrous kaolin and a particular kaolin which has been calcined through its characteristic exotherm and which produces a catalyst having a novel morphology comprising a macroporous matrix and crystallized zeolite freely coating the walls of the pores of the matrix. Calcination of the hydrous kaolin to metakaolin and formation of in-situ zeolite by treatment with sodium silicate yields a catalyst containing Y-faujasite and transforms the dispersible boehmite into a transitional alumina. The catalyst can be used to crack resid or resid-containing feeds as the alumina phase formed from the dispersible boehmite passivates nickel and vanadium contaminants.
    Type: Application
    Filed: June 6, 2002
    Publication date: July 24, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: David H. Harris, Mingting Xu, David Stockwell, Rostam J. Madon
  • Publication number: 20030124037
    Abstract: An apparatus useful to treat exhaust gas stream, including diesel engine exhaust. The exhaust stream passes form and exhaust outlet to a catalyzed filter in communication with the exhaust outlet. The catalyzed filter comprises a first catalyst which comprises a first platinum group metal; a first cerium component; and preferably a zirconium component. There can be a second catalyst in communication with the first catalyst, the second catalyst comprises a second cerium component.
    Type: Application
    Filed: December 20, 2002
    Publication date: July 3, 2003
    Applicant: ENGELHARD CORPORATION
    Inventors: Kenneth E. Voss, Stanley Roth, Joseph C. Dettling, Gary W. Rice, Yiu Kwan Lui, Mahmoud Yassine
  • Patent number: 6585822
    Abstract: Novel nanosized kaolin clay particles are prepared by agitating a fine particle size fraction of kaolin clay in a Netzsch mill until the particle size is reduced, aspect ratio is decreased and surface area is increased. The ultrafine kaolin particles are especially useful as a pigment to provide high surface gloss to ink jet printing papers.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: July 1, 2003
    Assignee: Engelhard Corporation
    Inventors: Richard R. Berube, Michael G. Londo, Sathanjheri A. Ravishankar
  • Patent number: 6586359
    Abstract: A catalytic composition and method of making the same in which a catalytic material has an average pore size distribution sufficiently large to substantially prevent capillary condensation.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: July 1, 2003
    Assignee: Engelhard Corporation
    Inventors: Fred M. Allen, Patrick W. Blosser, Ronald M. Heck, Jeffrey B. Hoke, Terence C. Pole, John J. Steger
  • Patent number: 6586254
    Abstract: An article, apparatus and method for simulating poisoning and deactivating catalysts with catalyst poison compounds at least one catalyst poison compound selected from the group consisting of a compound comprising phosphorous, a compound comprising zinc compound and a compound comprising phosphorous and zinc.
    Type: Grant
    Filed: June 15, 2000
    Date of Patent: July 1, 2003
    Assignee: Engelhard Corporation
    Inventors: Sanath V. Kumar, Michel Deeba, Patrick L. Burk
  • Patent number: 6585945
    Abstract: The present invention relates to sulfur tolerant catalyst composites useful for reducing contaminants in exhaust gas streams, especially gaseous streams containing sulfur oxide contaminants. More specifically, the present invention is concerned with improved NOx trap catalysts for use in diesel engines as well as lean burn gasoline engines. The sulfur tolerant NOx trap catalyst composites comprise a platinum component, a support, and a NOx sorbent component prepared by hydrothermal synthesis. The NOx sorbent component comprises a first metal oxide and a second metal oxide. The metal in the first metal oxide is selected from the group consisting of aluminum, titanium, zirconium, silicon, and composites thereof, and the metal in the second metal oxide is selected from the group consisting of Group IIA metals, Group III metals, Group IV metals, rare earth metals, and transition metals. The metal in the first metal oxide is different from the metal in the second metal oxide.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: July 1, 2003
    Assignee: Engelhard Corporation
    Inventors: Joseph H-Z. Wu, Joseph C. Dettling
  • Publication number: 20030115859
    Abstract: The invention provides low temperature NO2 trap compositions useful for adsorbing NO2 from a gas stream at lower temperatures, and releasing the NO2 at higher temperatures. The low temperature trap compositions are useful for incorporation into a diesel exhaust system equipped with a soot filter. The NO2 from the diesel exhaust can be stored when the exhaust temperature is cool, e.g., during startup and at times of low load, and released when the exhaust is at higher temperatures. The released NO2 serves as an effective oxidant for the combustion of soot deposited on the soot filter. These temperatures are significantly lower than those required for the combustion of soot using O2 as an oxidant. The methods of the invention thereby provide a method for regenerating the soot filter within operating temperature ranges typical of diesel engine exhaust systems.
    Type: Application
    Filed: December 21, 2001
    Publication date: June 26, 2003
    Applicant: ENGELHARD CORPORATION
    Inventor: Michel Deeba
  • Patent number: 6582764
    Abstract: A color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a first layer which acts as a reflector to light directed thereon, a visibly transparent second organic layer encapsulating the first layer in which the second layer provides an optically variable reflection of light impinging thereon and a third layer encapsulating the second layer and being selectively transparent to light directed thereon.
    Type: Grant
    Filed: October 9, 2001
    Date of Patent: June 24, 2003
    Assignee: Engelhard Corporation
    Inventors: Daniel S. Fuller, Curtis J. Zimmermann