Patents by Inventor Quentin G. Hopkins

Quentin G. Hopkins 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).

  • Tin (II) stabilizer for hydrogen peroxide
    Patent number: 5078672
    Abstract: A method for stabilizing hydrogen peroxide and the stabilized composition are claimed employing as a stabilizer a tin (II) salt of an acid selected from the group hydrofluoric acid, C6 to C17 saturated monocarboxylic acids and C2 to C6 saturated polycarboxylic acids, preferably oxalic acid. The tin content of hydrogen peroxide prepared from a tin (II) oxalate stock solution can be reduced by filtration to less than 1 mg/l if the tin oxalate stock solution has been properly aged.
    Type: Grant
    Filed: August 27, 1990
    Date of Patent: January 7, 1992
    Assignee: FMC Corporation
    Inventors: Edward F. Dougherty, Quentin G. Hopkins, James E. Sanborn, A. Thomas Weibel
  • Stabilization of high purity hydrogen peroxide
    Patent number: 4534945
    Abstract: An aqueous 25% to 35% solution of hydrogen peroxide with a residue on evaporation of 20 mg/l or less are stabilized against decomposition by a maximum of 1.4 mg/l tin. The tin is maintained in the solution in the form of a very fine colloidal sol by the addition of a maximum of 2-5 mg/kg of phosphate added as a phosphonic acid and a maximum of 5.5 mg/kg of a hydroxycarboxylic acid.
    Type: Grant
    Filed: May 3, 1984
    Date of Patent: August 13, 1985
    Assignee: FMC Corporation
    Inventors: Quentin G. Hopkins, Jhonce N. Browning
  • Process for manufacturing hydrogen peroxide
    Patent number: 4428922
    Abstract: In the anthraquinone process for manufacturing hydrogen peroxide an improvement is obtained in the productivity of a fixed-bed catalytic hydrogenator operating in the dispersed-bubble flow regime by premixing the hydrogen gas and the working solution by means of a static mixer.
    Type: Grant
    Filed: May 14, 1982
    Date of Patent: January 31, 1984
    Assignee: FMC Corporation
    Inventor: Quentin G. Hopkins