Patents by Inventor Andreas Dorflein

Andreas Dorflein 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).

  • Catalysts comprising halide-containing alkali tungstates for the synthesis of alkylmercaptan, and process for their preparation
    Patent number: 8022254
    Abstract: The invention relates to a halide-containing alkali tungstate catalyst for the synthesis of alkylmercaptans from alkanols and hydrogen sulfide, and to a process for the preparation of this catalyst.
    Type: Grant
    Filed: December 15, 2005
    Date of Patent: September 20, 2011
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Andreas Dörflein
  • Process for regenerating a catalyst
    Patent number: 7846861
    Abstract: A process for regenerating a catalyst used in the preparation of acrolein from glycerol, which comprises tungsten compounds and has acidic properties and at least one promoter.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: December 7, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Klaus Huthmacher, Andreas Dörflein
  • Catalysts and process for dehydrating glycerol
    Patent number: 7790934
    Abstract: A process for preparing acrolein from glycerol using an acidic solid-state catalyst which comprises tungsten compounds and further promoters.
    Type: Grant
    Filed: January 15, 2010
    Date of Patent: September 7, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Klaus Huthmacher, Andreas Dörflein
  • Novel Catalysts and Process for Dehydrating Glycerol
    Publication number: 20100113833
    Abstract: A process for preparing acrolein from glycerol using an acidic solid-state catalyst which comprises tungsten compounds and further promoters.
    Type: Application
    Filed: January 15, 2010
    Publication date: May 6, 2010
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Klaus Huthmacher, Andreas Dörflein
  • Catalyst for the synthesis of alkyl mercaptan and process for the production thereof
    Patent number: 7691776
    Abstract: The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: April 6, 2010
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Andreas Dörflein, Michael Rückriegel
  • CATALYST FOR THE SYNTHESIS OF ALKYL MERCAPTAN AND PROCESS FOR THE PRODUCTION THEREOF
    Publication number: 20090306432
    Abstract: The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
    Type: Application
    Filed: August 14, 2009
    Publication date: December 10, 2009
    Applicant: Evonik Degussa GmbH
    Inventors: HUBERT REDLINGSHÖFER, CHRISTOPH WECKBECKER, ANDREAS DÖRFLEIN, MICHAEL RÜCKRIEGEL
  • Catalyst for the synthesis of alkyl mercaptan and process for the production thereof
    Patent number: 7592288
    Abstract: The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
    Type: Grant
    Filed: August 23, 2004
    Date of Patent: September 22, 2009
    Assignee: Evonik Degussa GmbH
    Inventors: Hubert Redlingshöfer, Christoph Weckbecker, Andreas Dörflein, Michael Rückriegel
  • PROCESS FOR REGENERATING A CATALYST
    Publication number: 20080214384
    Abstract: A process for regenerating a catalyst used in the preparation of acrolein from glycerol, which comprises tungsten compounds and has acidic properties and at least one promoter.
    Type: Application
    Filed: January 22, 2008
    Publication date: September 4, 2008
    Inventors: Hubert Redlingshofer, Christoph Weckbecker, Klaus Huthmacher, Andreas Dorflein
  • NOVEL CATALYSTS AND PROCESS FOR DEHYDRATING GLYCEROL
    Publication number: 20080183019
    Abstract: A process for preparing acrolein from glycerol using an acidic solid-state catalyst which comprises tungsten compounds and further promoters.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 31, 2008
    Inventors: Hubert Redlingshofer, Christoph Weckbecker, Klaus Huthmacher, Andreas Dorflein
  • Catalytic removal of dissolved oxygen from organic liquids
    Patent number: 7344649
    Abstract: A method for removal of dissolved oxygen from organic liquids by use of a solid state catalyst. In doing so the dissolved oxygen is converted by the action of a reducing agent into water.
    Type: Grant
    Filed: April 14, 2005
    Date of Patent: March 18, 2008
    Assignee: Degussa AG
    Inventors: Hubert Redlingshöfer, Andreas Dörflein, Christoph Weckbecker
  • Catalysts comprising halide-containing alkali tungstates for the synthesis of alkylmercaptan, and process for their preparation
    Publication number: 20060135816
    Abstract: The invention relates to a halide-containing alkali tungstate catalyst for the synthesis of alkylmercaptans from alkanols and hydrogen sulfide, and to a process for the preparation of this catalyst.
    Type: Application
    Filed: December 15, 2005
    Publication date: June 22, 2006
    Inventors: Hubert Redlingshofer, Christoph Weckbecker, Andreas Dorflein
  • Catalytic removal of dissolved oxygen from organic liquids
    Publication number: 20050230322
    Abstract: A method for removal of dissolved oxygen from organic liquids by use of a solid state catalyst. In doing so the dissolved oxygen is converted by the action of a reducing agent into water.
    Type: Application
    Filed: April 14, 2005
    Publication date: October 20, 2005
    Inventors: Hubert Redlingshofer, Andreas Dorflein, Christoph Weckbecker
  • Catalyst for the synthesis of alkyl mercaptan and process for the production thereof
    Publication number: 20050080295
    Abstract: The invention relates to an oxidic catalyst containing cesium and tungsten for the synthesis of alkyl mercaptans from alkanols and hydrogen sulfide, and to a process for the production of this catalyst, wherein the molar ratio of cesium to tungsten is <2:1.
    Type: Application
    Filed: August 23, 2004
    Publication date: April 14, 2005
    Applicant: Degussa AG
    Inventors: Hubert Redlingshofer, Christoph Weckbecker, Andreas Dorflein, Michael Ruckriegel