Patents by Inventor Norbert Zeitler

Norbert Zeitler 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).

  • Methods of producing monolithic oxidation catalysts and their use in gas phase oxidation of carbohydrates
    Patent number: 6730631
    Abstract: A method is for producing monolithic substrate catalysts and for their use in the gas phase oxidation of hydrocarbons. The catalysts are obtained by coating the catalyst substrate with a suspension that includes a catalytically active compound and one or more surfactants of the general formula RnYmX. R represents the hydrophobic part of the surfactant, with n being 1, 2 or 3. Y represents the hydrophobic part of the surfactant, with m being 0, 1, 2, or 3 and X represents the hydrophilic head group of the surfactant.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: May 4, 2004
    Assignee: Consortium für Elektrochemische Industrie GmbH
    Inventors: Hans-Jürgen Eberle, Olaf Helmer, Karl-Heinz Stocksiefen, Stefan Trinkhaus, Ulrich Wecker, Norbert Zeitler
  • Shell catalyst for producing acetic acid by gas phase oxidation of unsaturated C4 -hydrocarbons
    Patent number: 6274763
    Abstract: The invention relates to a shell catalyst for producing acetic acid by gas-phase oxidation of unsaturated C4-hydrocarbons, comprising an inert non-porous carrier and a catalytically active mixed oxide material applied on the outer surface of the carrier, wherein said material contains (a) one or several oxides from the group titanium dioxide, zircon dioxide, stannic dioxide, aluminum oxide, and b) 0.1 to 1.5 wt. % vanadium pentoxide in relation to the weight of the constituent (a) and per m2/g of the specific surface of the constituent (a).
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: August 14, 2001
    Assignee: Consortium für elektrochemische Industrie GmbH
    Inventors: Christoph Ruedinger, Hans-Juergen Eberle, Norbert Zeitler, Max Wollin, Gudrun Wittmann
  • Process for producing cycloalkadienes
    Patent number: 4668836
    Abstract: A process for producing cycloalkadienes in liquid phase by metathesis reaction of cycloalkenes in the presence of a carrier catalyst based on Re.sub.2 O.sub.7 /Al.sub.2 O.sub.3. The cycloalkenes in the form of 0.01 to 0.05 molar solutions are contacted with the carrier catalyst in a fixed bed arrangement with contact times of 10 to 100 seconds.
    Type: Grant
    Filed: October 24, 1985
    Date of Patent: May 26, 1987
    Assignee: Consortium fur Elektrochemische Industrie GmbH
    Inventors: Hans-J/u/ rgen Eberle, Franz-Heinrich Kreuzer, Norbert Zeitler