Patents Represented by Attorney, Agent or Law Firm Pearne & Gorden LLP
  • Patent number: 7252767
    Abstract: The present invention features a method of making hydrous zirconium oxide having desirable properties, including resistance to moisture content, predetermined particle size, and developed porosity and surface area. The inventive material is suitable for use as an ion exchanger, a catalyst and a catalyst support. The process comprises providing a liquid comprising a zirconium compound and an alkali metal-containing reagent. The alkali metal-containing reagent may comprise a compound selected from the group consisting of MOH-M2SO4, MOH-M3PO4, and combinations thereof, where M is at least one of Li, Na and K. The zirconium compound may be treated with the alkali metal-containing reagent effective to form a mixture which achieves an uptake of alkali metal in an amount ranging from 0.5 to 2.5 meq/g. The mixture is reacted to form the hydrous zirconium oxide. A molar ratio of SO4/Zr and PO4/Zr in the mixture may range from 0.2-0.7:1. The mixture may be heated at a temperature ranging from 80 to 150° C.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: August 7, 2007
    Assignee: Magnesium Elektron, Inc.
    Inventors: Anatoly I. Bortun, Clive J. Butler
  • Patent number: D473455
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: April 22, 2003
    Inventors: Sheldon H. Goodman, Brian Stelmarski