Patents by Inventor Otto M. Velthuis

Otto M. Velthuis 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).

  • Process for the preparation of a silver-containing ethylene oxide catalyst and the catalyst prepared by the process
    Patent number: 4806518
    Abstract: A process for the preparation of a silver-containing catalyst suitable for the oxidation of ethylene to ethylene oxide which comprises:(a) mixing alumina with a salt of an alkali metal and with aluminum fluoride or aluminum chloride,(b) calcining the mixture to obtain an alkali enriched alumina carrier,(c) applying a silver compound to the alkali enriched alumina carrier and converting said silver compound to metallic silver.
    Type: Grant
    Filed: May 15, 1987
    Date of Patent: February 21, 1989
    Assignee: Shell Oil Company
    Inventors: Gosse Boxhoorn, Peter J. Schoenmakers, Otto M. Velthuis
  • Ethylene oxide catalyst
    Patent number: 4731350
    Abstract: The invention relates to a process for the preparation of a silver catalyst suitable for the oxidation of ethylene to ethylene oxide, characterized in that a silver compound and, if desired, a promoter are applied to a carrier, after which the silver compound is reduced to metallic silver, and in which process the carrier has been prepared by mixing an aluminum compound with an alkali metal hydroxide and with an organic fluorine compound and by calcining the obtained mixture, to the silver catalysts prepared by means of this process and to the use of the silver catalysts in the preparation of ethylene oxide.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: March 15, 1988
    Assignee: Shell Oil Company
    Inventors: Gosse Boxhoorn, Otto M. Velthuis, Ann H. Klazinga
  • Ethylene oxide catalyst
    Patent number: 4728634
    Abstract: This invention relates to ethylene oxide catalysts comprising silver, alkali metal promoters supported on a carrier, which carrier is prepared by a process which comprises mixing an aluminum compound with an alkali metal salt and with a silicon compound and calcining resultant mixture at a temperature greater than about 1100.degree. C.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: March 1, 1988
    Assignee: Shell Oil Company
    Inventors: Gosse Boxhoorn, Aan H. Klazinga, Otto M. Velthuis
  • Ethylene oxide catalyst
    Patent number: 4701437
    Abstract: This invention relates to ethylene oxide catalysts comprising silver, alkali metal promoters supported on a carrier, which carrier is prepared by a process which comprises mixing an aluminum compound with a tin compound and calcining resultant mixture at a temperature greater than about 1100.degree. C.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: October 20, 1987
    Assignee: Shell Oil Company
    Inventors: Gosse Boxhoorn, Aan H. Klazinga, Otto M. Velthuis
  • Process for the separation of crystalline silicates
    Patent number: 4383981
    Abstract: Fine-crystalline silicates are separated by filtration from an aqueous mother liquor which contains at least 30% v of a water-miscible alcohol, ketone, sulphoxide or cyclic ether which, per molecule, contain at most five carbon atoms with a boiling point below 85.degree. C.
    Type: Grant
    Filed: January 28, 1982
    Date of Patent: May 17, 1983
    Assignee: Shell Oil Company
    Inventors: Willibrord A. van Erp, Otto M. Velthuis