Patents by Inventor Wigbert Himmel

Wigbert Himmel 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).

  • CATALYST AND HYDROTREATING PROCESS
    Publication number: 20080009408
    Abstract: A process for the preparation of a catalyst, which process comprises the steps of: i) mixing an alumina precursor with combustible carbon-containing fibres with a diameter in the range of from 0.5 to 5 ?m and a length of no greater than 100 ?m in an amount in the range of from 20 to 40 wt % based on the total dry mixture; ii) adding nitric acid and water to form an extrudable mass; iii) extruding the mixture to form shaped particles; iv) drying the shaped particles; v) heating the particles in an atmosphere comprising no more than 5 vol % oxygen at a temperature in the range of from 350 to 600° C.; and vi) then heating the particles in a gas mixture comprising at least 12 vol % oxygen at a temperature in the range of from 450 to 600° C.
    Type: Application
    Filed: March 8, 2007
    Publication date: January 10, 2008
    Inventors: Peter Birke, Frank Goerlitz, Wigbert Himmel, Jurgen Hunold, Hans-Heino John
  • Process for passivating pyrophorous catalysts
    Patent number: 6693056
    Abstract: The present invention relates to a process for passivating pyrophorous solids by using nitrogen, carbon dioxide and oxygen under closely defined conditions to obtain a uniformly passivated solid.
    Type: Grant
    Filed: November 30, 2001
    Date of Patent: February 17, 2004
    Assignee: Kataleuna GmbH Catalysts
    Inventors: Peter Birke, Reinhard Geyer, Wigbert Himmel, Jurgen Hunold, Wolfgang Kogler, Rainer Schodel