Patents by Inventor Rudiger Knauf

Rudiger Knauf 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).

  • Polymer composition, membrane containing said composition, method for the production and uses thereof
    Publication number: 20040091762
    Abstract: The composition described comprises 30 to 99.5% by weight of a sulfonated aromatic polyether ketone which has an ion-exchange capacity of from 1.3 to 4.0 meq (—SO3H)/g of polymer, and from 0.5 to 70% by weight of a polybenzimidazole.
    Type: Application
    Filed: October 14, 2003
    Publication date: May 13, 2004
    Inventors: Thomas Soczka-Guth, Georg Frank, Jochen Baurmeister, Jurgen Pawlik, Rudiger Knauf
  • Polymer composition, membrane containing said composition, method for the production and uses thereof
    Patent number: 6632847
    Abstract: Polymer composition, membrane comprising the same, process for production thereof and use thereof The composition described comprises 30 to 99.5% by weight of a sulfonated aromatic polyether ketone which has an ion-exchange capacity of from 1.3 to 4.0 meq (—SO3H)/g of polymer, and from 0.5 to 70% by weight of a polybenzimidazole. This composition can, as can a sulfonated polyether ketone of PEK type, be processed to give membranes, preferably used in fuel cells.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: October 14, 2003
    Assignee: Celanese Ventures GmbH
    Inventors: Thomas Soczka-Guth, Georg Frank, Jochen Baurmeister, Jürgen Pawlik, Rüdiger Knauf
  • Ethylene treatment by gas permeation
    Patent number: 6478851
    Abstract: The invention relates to a process for separating off ethylene from a gas mixture comprising more than 8% by volume of carbon dioxide or oxygen, by gas permeation.
    Type: Grant
    Filed: January 3, 2002
    Date of Patent: November 12, 2002
    Assignee: Axiva GmbH
    Inventors: Hermann Berwe, Rüdiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Ethylene treatment by gas permeation
    Publication number: 20020087032
    Abstract: The invention relates to a process for preparing carbonyl compounds from olefins and an oxidizing agent in which the olefin is oxidized in a reactor, a reaction gas mixture which comprises unoxidized olefin being formed, which comprises separating off unoxidized olefin at least in part from the reaction gas mixture by a membrane process.
    Type: Application
    Filed: January 3, 2002
    Publication date: July 4, 2002
    Applicant: Axiva GmbH, a corporation of Germany
    Inventors: Hermann Berwe, Rudiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Preparation of ethylene by gas permeation
    Patent number: 6365784
    Abstract: The invention relates to a process for preparing carbonyl compounds from olefins and an oxidizing agent in which the olefin is oxidized in a reactor, a reaction gas mixture which comprises unoxidized olefin being formed, which comprises separating off unoxidized olefin at least in part from the reaction gas mixture by a membrane process.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: April 2, 2002
    Assignee: Axiva GmbH
    Inventors: Hermann Berwe, Rüdiger Knauf, Herbert Neumann, Matthias Stumpf, Manfred Wolter
  • Method for producing a membrane used to operate fuel cells and electrolyzers
    Patent number: 6355149
    Abstract: Membranes for use in polymer electrolyte fuel cells or electrolyzers comprise a sulfonated aromatic polyether ether ketone of the formula (I) wherein the ion exchange equivalent (I.E.C.) of the sulfonated polyether ether ketone is in the range from 1.35 to 1.95 mmol (—SO3H)/g (polymer) and the membrane has a long-term stability of at least 1000 hours at an operating voltage of from 0.4 to 1.1 V.
    Type: Grant
    Filed: August 14, 2000
    Date of Patent: March 12, 2002
    Assignee: Celanese Ventures GmbH
    Inventors: Thomas Soczka-Guth, Jochen Baurmeister, Georg Frank, Rüdiger Knauf
  • Method for producing solution of polymers functionalized by acid groups by microwave radiation
    Patent number: 6348516
    Abstract: Process for using microwave irradiation to prepare solutions of polymers functionalized with acid groups The invention relates to a process for preparing aqueous, hydrous and anhydrous solutions of polymers functionalized with acid groups, which comprises using microwave radiation to supply the heat required to prepare the solution. The solutions are suitable as a starting material for producing gas diffusion electrodes, fuel cells and polymer-electrolyte-stabilized platinum nanoparticles.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: February 19, 2002
    Assignee: Celanese Ventures GmbH
    Inventors: Thomas Soczka-Guth, Helmut Witteler, Gregor Deckers, Georg Frank, Kilian Brehl, Jürgen Lenze, Harald Bönsel, Rüdiger Knauf