Patents by Inventor Horst Ueberschaer

Horst Ueberschaer 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).

  • Supported silver catalysts mixed with promoter metal compounds for the production of ethylene oxide
    Patent number: 4409394
    Abstract: The activity and the service life of supported silver catalysts used in the preparation of ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen are extended by using mixtures of:(a) supported silver catalysts and promoter metal compounds;(b) supported silver catalysts and supported promoter metal compounds;(c) promoter metal compound treated supported silver catalysts and promoter metal compounds; or(d) promoter metal compound treated supported silver catalysts and supported promoter metal compounds.Promoter metal compounds containing about 0.001-0.05% by weight rubidium, about 0.01-0.20% by weight potassium, about 0.001-0.5% by weight cesium or about 0.01-0.25% by weight barium, based on the total weight of catalyst, are suitable.
    Type: Grant
    Filed: September 18, 1981
    Date of Patent: October 11, 1983
    Assignee: Chemische Werke Huls AG
    Inventors: Erwin Vangermain, Claus-Dieter Mengler, Rainer Elm, Horst Ueberschaer, Wilhelm Brauckmann
  • Supported silver catalysts mixed with promoter metal compounds for the production of ethylene oxide
    Patent number: 4310442
    Abstract: The activity and the service life of supported silver catalysts used in the preparation of ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen are extended by using mixtures of:(a) supported silver catalysts and promoter metal compounds;(b) supported silver catalysts and supported promoter metal compounds;(c) promoter metal compound treated supported silver catalysts and promoter metal compounds; or(d) promoter metal compound treated supported silver catalysts and supported promoter metal compounds.Promoter metal compounds containing about 0.001-0.05% by weight rubidium, about 0.01-0.20% by weight potassium, about 0.001-0.5% by weight cesium or about 0.01-0.25% by weight barium, based on the total weight of catalyst, are suitable.
    Type: Grant
    Filed: June 24, 1980
    Date of Patent: January 12, 1982
    Assignee: Chemische Werke Huls AG
    Inventors: Erwin Vangermain, Claus-Dieter Mengler, Rainer Elm, Horst Ueberschaer, Wilhelm Brauckmann
  • Process for the preparation of silver catalysts for the production of ethylene oxide
    Patent number: 4305844
    Abstract: A process for preparing silver catalysts containing alkaline earth metals and alkali metals as promoters for the production of ethylene oxide by oxidizing ethylene with oxygen or oxygen-containing gases. The silver catalysts are prepared by:(a) depositing a suspension consisting of silver oxide and an aqueous solution of an organic silver salt on a porous substrate, the molar ratio of the silver in the silver oxide to the silver in the silver salt being from about 35 to 65%, and periodically increasing the pressure (decreasing the vacuum) being used during the absorption;(b) carrying out an interim drying as a thin moving bed in an inert gas atmosphere at temperatures between about 50.degree. and 150.degree. C.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: December 15, 1981
    Assignee: Chemische Werke Huls AG
    Inventors: Erwin Vangermain, Willi Brauckmann, Hans-Jurgen Erberich, Horst Ueberschaer