Gasoline Sorbed Patents (Class 95/146)
  • Method of preparation of gasoline vapor adsorptive activated carbon
    Patent number: 5324703
    Abstract: A method of manufacturing hard pelleted activated carbon is disclosed in which pellets are first formed by agglomeration in a pin mixer followed by pelleting the plasticized acid char (without the use of additional binders), and then activating the carbon pellets to yield a product with high density and activity.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: June 28, 1994
    Assignee: Westvaco Corporation
    Inventors: John C. McCue, Zhiquan Q. Yan, Edward D. Tolles
  • Preparation for high activity, high density carbon
    Patent number: 5304527
    Abstract: Lignocellulosic carbonaceous material is activated to produce a high activity, high density gas-phase activated carbon under conditions which effectively alter the particle pore volume size distribution to optimize the carbon's mesoporosity. A novel process is disclosed for producing the carbon.
    Type: Grant
    Filed: November 16, 1992
    Date of Patent: April 19, 1994
    Assignee: Westvaco Corporation
    Inventor: Mitchell S. Dimitri
  • Emission suppression system for stored volatile organic compounds
    Patent number: 5294246
    Abstract: A method of controlling the emission of volatile organic compound vapors from storage vessels via pressure swing absorption utilizing a single adsorber vessel is disclosed.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: March 15, 1994
    Assignee: The Dow Chemical Company
    Inventor: Gary L. Gardner, Sr.
  • Method to reduce fuel vapor emissions
    Patent number: 5288307
    Abstract: Hydrocarbon emissions from fuel reservoirs, particularly those associated with motor vehicles, are abated by contacting a vented hydrocarbon fuel vapor stream from the reservoirs with a polymeric adsorbent derived from a macroporous or macroreticular copolymer of at least one monovinylidene aromatic monomer and a crosslinking monomer. The macroporous copolymers are converted into suitable adsorbents by post-polymerization crosslinking in a swollen state in the presence of a Friedel-Crafts catalyst. The resulting adsorbent has improved hydrocarbon adsorption capacity relative to conventional activated carbon adsorbents.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: February 22, 1994
    Assignee: The Dow Chemical Company
    Inventors: H. Robert Goltz, Tom N. Demopolis
  • Preparation of high activity, high density activated carbon
    Patent number: 5250491
    Abstract: Lignocellulosic carbonaceous material is activated to produce a high activity, high density gas-phase activated carbon under conditions which effectively alter the particle pore volume size distribution to optimize the carbon's mesoporosity. An agglomeration process is disclosed for producing the carbon.
    Type: Grant
    Filed: August 11, 1992
    Date of Patent: October 5, 1993
    Assignee: Westvaco Corporation
    Inventor: Zhiquan Q. Yan
  • Emission control device
    Patent number: 5238470
    Abstract: Lignocellulosic carbonaceous material is activated to produce a high activity, high density gas-phase activated carbon under conditions which effectively alter the particle pore size distribution to optimize the carbon's mesoporosity. Alternative processes are disclosed for producing the carbon, as are its application in emission control for vehicles.
    Type: Grant
    Filed: July 2, 1992
    Date of Patent: August 24, 1993
    Assignee: Westavco Corporation
    Inventors: Edward D. Tolles, Mitchell S. Dimitri, Charles C. Matthews