Patents by Inventor Mark Thornton Vandersall

Mark Thornton Vandersall has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Metal-doped sulfonated ion exchange resin catalysts
    Patent number: 6977314
    Abstract: A method for preparing ketones in greater yield and selectivity compared to previous catalyzed reactions by acid-catalyzed condensation reaction using a metal-doped polysulfonated ion exchange resin catalyst is disclosed. For example, use of polysulfonated ion exchange resins having at least 5.0 milliequivalents sulfonic acid groups/gram catalyst and loaded with metal, such as palladium, provides enhanced yields of methyl isobutyl ketone from the condensation reaction of acetone compared to use of conventional monosulfonated ion exchange resin catalysts.
    Type: Grant
    Filed: December 3, 2002
    Date of Patent: December 20, 2005
    Assignee: Rohm and Haas Company
    Inventors: Mark Thornton Vandersall, Rudolf Alfred Weinand
  • Low sodium cleavage product
    Patent number: 6825387
    Abstract: Washed cleavage product (WCP) in a phenol manufacturing process is treated to remove sodium ions. The WCP is contacted with a cation exchange resin in hydrogen form, and then with anion exchange resin in free base or hydroxide form, to produce a WCP essentially free of sodium ions. The cation and anion exchange resins are regenerated with acid and caustic, respectively. The treatment improves productivity and product quality of new and existing phenol processes.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: November 30, 2004
    Assignee: Kellogg Brown & Root, Inc.
    Inventors: Theodor Robert Wilks, Mark Thornton Vandersall, William Frederick Rogers, Jr.
  • Low Sodium Cleavage Product
    Publication number: 20040106831
    Abstract: Washed cleavage product (WCP) in a phenol manufacturing process is treated to remove sodium ions. The WCP is contacted with a cation exchange resin in hydrogen form, and then with anion exchange resin in free base or hydroxide form, to produce a WCP essentially free of sodium ions. The cation and anion exchange resins are regenerated with acid and caustic, respectively. The treatment improves productivity and product quality of new and existing phenol processes.
    Type: Application
    Filed: September 11, 2003
    Publication date: June 3, 2004
    Inventors: Theodor Robert Wilks, Mark Thornton Vandersall, William Frederick Rogers
  • Metal-doped sulfonated ion exchange resin catalysts
    Publication number: 20030139629
    Abstract: A method for preparing ketones in greater yield and selectivity compared to previous catalyzed reactions by acid-catalyzed condensation reaction using a metal-doped polysulfonated ion exchange resin catalyst is disclosed. For example, use of polysulfonated ion exchange resins having at least 5.0 milliequivalents sulfonic acid groups/gram catalyst and loaded with metal, such as palladium, provides enhanced yields of methyl isobutyl ketone from the condensation reaction of acetone compared to use of conventional monosulfonated ion exchange resin catalysts.
    Type: Application
    Filed: December 3, 2002
    Publication date: July 24, 2003
    Inventors: Mark Thornton Vandersall, Rudolf Alfred Weinand