Patents Assigned to Engelhard Corporation
  • Apparatus and process for improved hydrogen sulfide removal
    Publication number: 20020041842
    Abstract: Provided is a trap and method for removing hydrogen sulfide from a gas stream. The hydrogen sulfide trap includes a monolith substrate on which is disposed zinc oxide, and a second metal or oxide thereof. In some aspects, the hydrogen sulfide trap is advantageously incorporated into systems for producing hydrogen for PEM fuel cells.
    Type: Application
    Filed: September 26, 2001
    Publication date: April 11, 2002
    Applicant: ENGELHARD CORPORATION
    Inventors: Wolfgang F. Ruettinger, Robert J. Farrauto, Lawrence Shore
  • Plasma fuel processing for NOx control lean burn engines
    Patent number: 6363716
    Abstract: A highly reactive reducing gas mixture is produced from vehicle fuel and introduced into the exhaust gas of an internal combustion engine operated at lean burn conditions and passed over a reducing catalyst to convert NOX emissions to benign emissions. Preferably, fuel with oxygen present in a carrier gas is metered into a plasma reactor having a bed of dielectric particles which prevent formation of coke as the fuel is reacted. The plasma induces a number of simultaneous reactions with the fuel to produce a substantial amount of oxygenated and non-oxygenated, unbranched organic molecules at relatively low temperatures that are highly reactive and ideally suited for use as a reducing agent in an SCR catalyst.
    Type: Grant
    Filed: November 7, 2000
    Date of Patent: April 2, 2002
    Assignee: Engelhard Corporation
    Inventors: Edward N. Balko, Kenneth E. Voss
  • Method, composition and system for the controlled release of chlorine dioxide gas
    Publication number: 20020036284
    Abstract: Method, composition and system for generating chlorine dioxide gas in a controlled release manner by combining at least one metal chlorite and a dry solid hydrophilic material that reacts with the metal chlorite in the presence of water vapor, but does not react with the metal chlorite in the substantial absence of liquid water or water vapor to produce chlorine dioxide gas in a sustained amount of from about 0.001 to 1,000 ppm.
    Type: Application
    Filed: November 28, 2001
    Publication date: March 28, 2002
    Applicant: ENGELHARD CORPORATION
    Inventors: Barry K. Speronello, Appadurai Thangaraj, Xiaolin Yang
  • Lustrous interference pigments with black absorption color
    Patent number: 6361593
    Abstract: A lustrous interference pigment with a black absorption color is obtained by forming a mica coated with hydrous titanium, iron and cobalt or chromium oxides, calcining the coated mica and then coating the resulting product with hydrous titanium and/or iron oxides and calcining the resulting product.
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: March 26, 2002
    Assignee: Engelhard Corporation
    Inventors: Carmine Vincent DeLuca, Jr., William P. Kurtenbach, Christine Mans
  • Powder coating composition and method
    Publication number: 20020034591
    Abstract: A laminar pigment which has an aluminum- or an aluminum-cerium oxide coating combined with a hydrolyzed silane coupling agent treated surface is used as a pigment for a powder coating composition. By combining the pigment with a powdery film-forming polymer, a film-forming composition which can be applied by electrostatic coating is produced.
    Type: Application
    Filed: October 10, 2001
    Publication date: March 21, 2002
    Applicant: Engelhard Corporation
    Inventors: Joseph Michael Bagala, Kurt Norman Beale
  • System for reducing NOx transient emission
    Publication number: 20020029564
    Abstract: A catalyst reduction system using diesel fuel as a reductant for vehicles equipped with diesel engines reduces NOx transient emissions produced during acceleration. Impending engine accelerations are sensed to produce metered pulse(s) of fuel oil simultaneously with and preferably in advance of, the NOx transient emission. The fuel pulse is sufficient in quantity to reduce the NOx transient emission when the NOx and HC resulting from the cracked fuel oil are present at spatially equal distances within the reducing catalytic converter. Optionally, the washcoat of the reducing catalyst is formulated to delay the adsorption/desorbtion of one of the gases on the washcoat to assure proper timing of the NOx transient and fuel pulse(s).
    Type: Application
    Filed: September 4, 2001
    Publication date: March 14, 2002
    Applicant: Engelhard Corporation
    Inventors: Stanley A. Roth, Joseph C. Dettling, Mahmoud Yassine
  • Method and apparatus for accelerated catalyst poisoning and deactivation
    Publication number: 20020022272
    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: Application
    Filed: March 9, 2001
    Publication date: February 21, 2002
    Applicant: ENGELHARD CORPORATION
    Inventors: Sanath V. Kumar, James Rogalo
  • Method and apparatus for treating the atmosphere
    Publication number: 20020018742
    Abstract: Method and apparatus for treating the atmosphere to lower the concentration of pollutants therein in which ambient air is passed into operative contact with a stationary substrate having at least one ambient air contacting surface having a pollutant treating material thereon.
    Type: Application
    Filed: January 22, 2001
    Publication date: February 14, 2002
    Applicant: ENGELHARD CORPORATION
    Inventors: Jeffrey B. Hoke, John R. Novak, John J. Steger, Terence C. Poles, L. Michael Quick, Ronald M. Heck, Zhicheng Hu, Michael Durilla
  • Paints containing low sheen opacifying pigments obtained by flux calcination of kaolin clay
    Patent number: 6346145
    Abstract: Flux calcined kaolin clay especially useful as a pigment for low sheen paints is obtained by mixing hydrous kaolin with an aqueous solution of alkaline flux, spray drying, pulverizing, calcining and repulverizing.
    Type: Grant
    Filed: August 2, 2000
    Date of Patent: February 12, 2002
    Assignee: Engelhard Corporation
    Inventors: John Hen, Ray Young, Andres Ginez, Sharad Mathur
  • Water purification using titanium silicate membranes
    Patent number: 6340433
    Abstract: Aqueous streams containing organic and/or inorganic contaminants are purified by the removal of the contaminant by contacting the aqueous stream with a membrane formed from a porous, crystalline titanium silicate.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: January 22, 2002
    Assignee: Engelhard Corporation
    Inventors: Steven M. Kuznicki, Richard M. Jacubinas, Jacqueline S. Curran, Valerie A. Bell
  • Pollutant treating devices and methods of making the same
    Patent number: 6340066
    Abstract: A pollutant treating device especially adapted for motor vehicles in which a housing containing a catalyst composition for treating pollutants is positioned within the normal flow pattern of ambient air within the motor vehicle and is preferably removably placed within a support, such as a bracket assembly where the housing can be readily removed and replaced and/or reused.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: January 22, 2002
    Assignee: Engelhard Corporation
    Inventors: Joseph C. Dettling, John J. Steger, Michael Spencer, Robert V. Russo
  • Method and device for cleaning the atmosphere
    Publication number: 20010055554
    Abstract: Method for treating atmospheric pollutants by contacting the atmosphere with a catalyst composition or adsorptive material coated on the surface of a substrate in which the catalyst composition or adsorptive material is protected from degradation by harmful contaminants contained in the atmosphere by a coating of at least one porous protective material and a device useful therefor.
    Type: Application
    Filed: August 2, 2001
    Publication date: December 27, 2001
    Applicant: ENGELHARD CORPORATION
    Inventors: Jeffrey B. Hoke, Ronald M. Heck, Fred M. Allen
  • Precious metal color effect materials and production thereof
    Patent number: 6325847
    Abstract: A precious metal color effect material is composed of a plurality of encapsulated substrate platelets in which each platelet is encapsulated with a first layer selected from the group consisting of silver, gold, platinum, palladium, rhodium, ruthenium, osmium, iridium and the alloys thereof, which acts as a reflector to light directed thereon, a second 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: November 30, 1999
    Date of Patent: December 4, 2001
    Assignee: Engelhard Corporation
    Inventors: James Douglas Christie, Daniel Stevenson Fuller, William Joseph Sullivan, Curtis James Zimmermann
  • Powder coating composition and method
    Patent number: 6325846
    Abstract: A laminar pigment which has an aluminum- or an aluminum-cerium oxide coating combined with a hydrolyzed silane coupling agent treated surface is used as a pigment for a powder coating composition. By combining the pigment with a powdery film-forming polymer, a film-forming composition which can be applied by electrostatic coating is produced.
    Type: Grant
    Filed: June 20, 2000
    Date of Patent: December 4, 2001
    Assignee: Engelhard Corporation
    Inventors: Joseph Michael Bagala, Kurt Norman Beale
  • Compositions for abatement of volatile organic compounds and apparatus and methods using the same
    Patent number: 6319484
    Abstract: A composition for abatement of airborne pollution by volatile organic compounds (“VOCs”) has an upstream composition which contains a protective adsorbent, e.g., Y zeolite, which is effective for adsorbing large VOC molecules, e.g., toluene, and a protective oxidation catalyst intimately intermingled therewith. The downstream composition contains a second adsorbent, e.g., a silver-containing ZSM-5, which is effective for adsorbing relatively smaller VOC molecules, e.g., propylene, and a second oxidation catalyst intimately intermingled therewith. Oxidation of VOCs while they are still retained on the adsorbents is promoted at temperatures lower than would be required if the VOCs were desorbed into the gaseous phase. Apparatus is provided including a first contact member (24) coated with the upstream composition and positioned upstream of a second contact member (32) coated with the downstream composition.
    Type: Grant
    Filed: December 14, 1999
    Date of Patent: November 20, 2001
    Assignee: Engelhard Corporation
    Inventors: Lawrence Shore, Robert J. Farrauto, Michel Deeba, Jordan K. Lampert, Ronald M. Heck
  • System for reducing NOx transient emission
    Patent number: 6311484
    Abstract: A catalyst reduction system using diesel fuel as a reductant for vehicles equipped with diesel engines reduces NOx transient emissions produced during acceleration. Impending engine accelerations are sensed to produce metered pulse(s) of fuel oil simultaneously with and preferably in advance of, the NOx transient emission. The fuel pulse is sufficient in quantity to reduce the NOx transient emission when the NOx and HC resulting from the cracked fuel oil are present at spatially equal distances within the reducing catalytic converter. Optionally, the washcoat of the reducing catalyst is formulated to delay the adsorption/desorbtion of one of the gases on the washcoat to assure proper timing of the NOx transient and fuel pulse(s).
    Type: Grant
    Filed: February 22, 2000
    Date of Patent: November 6, 2001
    Assignee: Engelhard Corporation
    Inventors: Stanley A. Roth, Joseph C. Dettling, Mahmoud Yassine
  • Method and system for the controlled release of chlorine dioxide gas
    Publication number: 20010036421
    Abstract: Method and system for generating chlorine dioxide gas in a controlled release manner by combining at least one metal chlorite and a solid material that reacts with the metal chlorite in the presence of water vapor, but does not react with the metal chlorite in the substantial absence of liquid water or water vapor to produce chlorine dioxide gas in a sustained amount of from about 0.025 to 1,000 ppm.
    Type: Application
    Filed: June 12, 2001
    Publication date: November 1, 2001
    Applicant: ENGELHARD CORPORATION
    Inventors: Barry K. Speronello, Appadurai Thangaraj, Xiaolin Yang
  • Close coupled catalyst
    Publication number: 20010036432
    Abstract: A stable, close-coupled catalyst, an article comprising the close-coupled catalyst and a related method of operation. The close-coupled catalyst comprises a catalyst support and a palladium catalytic component. Preferably and optionally, there are stabilizers including alkaline metal oxide, and rare earth metal components selected from the neodymium and lanthanum components. The close-coupled catalyst composition includes substantially no additional oxygen storage component such as praseodymium or cerium compounds. There is preferably a catalyst such as a three-way catalyst downstream of the close-coupled catalyst. The downstream catalyst preferably includes an oxygen storage component such as cerium oxide or praseodymium oxide.
    Type: Application
    Filed: May 4, 2001
    Publication date: November 1, 2001
    Applicant: ENGELHARD CORPORATION
    Inventors: Zhicheng Hu, Ronald M. Heck, Harold N. Rabinowitz
  • Low pressure EGR system for diesel engines
    Patent number: 6301887
    Abstract: A low pressure EGR system suitable for use as a passive retrofit system is disclosed for moving vehicles equipped with a diesel engine. The EGR loop inlet is positioned upstream of the exhaust particulate filter and downstream of the turbine to utilize backpressure created by the exhaust particulate filter to insure EGR flow in the loop. A catalyzed soot filter in communication with the EGR pickup insures cleansed EGR gases at the EGR return downstream of the air filter and upstream of the compressor. A corrugated EGR line provides cooling of the EGR gases.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: October 16, 2001
    Assignee: Engelhard Corporation
    Inventors: Alexander Gorel, John Lawrence Calabrese
  • Apparatus and method for diagnosis of catalyst performance
    Patent number: 6301881
    Abstract: A method and apparatus that converts time-resolved sensor signals into frequency domain signals using Fast Fourier Transforms and power spectral densities. A signal, as a means to assess catalyst performance such as a signal based on sensing oxygen concentration in motor vehicle exhaust in accordance with the present invention is in the time domain and has multiple components at different frequencies. The use of Fast Fourier Transforms isolates the various spectral density which arise from different frequency components of the complex time domain signal. The analysis has been found to be substantially independent of operating conditions. The power spectral density has found to be a precise indication of oxygen storage and release of the catalyst and catalyst performance. The catalyst performance can be signaled to the vehicle operator for on board diagnostics (OBD) of the catalyst.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: October 16, 2001
    Assignee: Engelhard Corporation
    Inventor: Sanath V. Kumar