Patents by Inventor Walther Muller

Walther Muller 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).

  • Method for regenerating a toxified catalyst containing ruthenium or ruthenium compounds
    Patent number: 11389791
    Abstract: A process for regenerating a catalyst containing ruthenium or ruthenium compounds, which includes, optionally at elevated temperature, subjecting the catalyst to a hydrogen halide treatment, particularly a gas stream comprising hydrogen chloride, under non-oxidative conditions and, optionally at reduced temperature, to at least a two-stage oxidative post-treatment. The catalyst may have been poisoned by sulfur compounds. After the removal of sulfur, the catalyst is subjected to an oxidative post-treatment.
    Type: Grant
    Filed: May 14, 2018
    Date of Patent: July 19, 2022
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Andre Rittermeier, Michael Venz, Thomas Burbach, Timm Schmidt, Tim Loddenkemper, Frank Gerhartz, Walther Müller
  • METHOD FOR REGENERATING A TOXIFIED CATALYST CONTAINING RUTHENIUM OR RUTHENIUM COMPOUNDS
    Publication number: 20210154657
    Abstract: A process is described for regenerating a catalyst comprising ruthenium or ruthenium compounds, which has been poisoned by sulfur compounds, in which the catalyst, optionally at elevated temperature, is subjected to treatment with a hydrogen halide, particularly a gas stream comprising hydrogen chloride, under non-oxidative conditions and additionally, optionally at reduced temperature, to an at least two-stage oxidative post-treatment.
    Type: Application
    Filed: May 14, 2018
    Publication date: May 27, 2021
    Applicant: Covestro Deutschland AG
    Inventors: Andre RITTERMEIER, Michael VENZ, Thomas BURBACH, Timm SCHMIDT, Tim LODDENKEMPER, Frank GERHARTZ, Walther MÜLLER
  • Processes for regenerating sulfur-poisoned, ruthenium and/or ruthenium compound-containing catalysts
    Patent number: 8889578
    Abstract: Processes comprising: providing a catalyst comprising a catalytic component selected from the group consisting of ruthenium, ruthenium compounds, and combinations thereof, wherein the catalyst is sulfur-poisoned with one or more sulfur compounds; and treating the catalyst with a gas stream comprising a hydrogen halide under nonoxidative conditions such that the catalyst is regenerated.
    Type: Grant
    Filed: March 23, 2009
    Date of Patent: November 18, 2014
    Assignee: Bayer MaterialScience AG
    Inventors: Timm Schmidt, Tim Loddenkemper, Frank Gerhartz, Walther Müller
  • CATALYST AND METHOD FOR PRODUCING CHLORINE BY MEANS OF A GAS-PHASE OXIDATION
    Publication number: 20140248208
    Abstract: A catalyst material for producing chlorine by the catalytic gas-phase oxidation of hydrogen chloride, wherein the catalyst comprises oxide compounds of cerium as active component components and zirconium dioxide as supporting component and the catalyst h as a particularly high space-time yield with respect to the reactor volume
    Type: Application
    Filed: October 19, 2012
    Publication date: September 4, 2014
    Applicant: BAYER INTELLECTUAL PROPERTY GMBH
    Inventors: Timm Schmidt, Maximilian Moser, Walther Müller
  • PROCESS FOR THE PREPARATION OF CHLORINE BY GAS PHASE OXIDATION ON NANOSTRUCTURED SUPPORTED RUTHENIUM CATALYSTS
    Publication number: 20120148478
    Abstract: The present invention relates to a process for the preparation of chlorine by gas phase oxidation using a supported catalyst based on ruthenium, characterised in that the catalyst support has a plurality of pores having a pore diameter>50 nm and carries nanoparticles containing ruthenium and/or ruthenium compounds as catalytically active components.
    Type: Application
    Filed: July 14, 2010
    Publication date: June 14, 2012
    Applicant: Bayer MaterialScience AG
    Inventors: Timm Schmidt, Christoph Gürtler, Jürgen Kintrup, Thomas Ernst Müller, Tim Loddenkemper, Frank Gerhartz, Walther Müller
  • PROCESS FOR ISOLATING METALLIC RUTHENIUM OR RUTHENIUM COMPOUNDS FROM RUTHENIUM-CONTAINING SOLIDS
    Publication number: 20100080744
    Abstract: The present invention relates to a process for mobilizing metallic ruthenium or ruthenium compounds from solids to form volatile ruthenium compounds by means of a gas stream containing a hydrogen halide and carbon monoxide, preferably hydrogen chloride and carbon monoxide, and for isolating the previously mobilized ruthenium compounds, preferably by deposition with cooling, e.g. in relatively cold zones, in particular on relatively cold surfaces, absorption in suitable solutions or adsorption on suitable support materials.
    Type: Application
    Filed: August 19, 2009
    Publication date: April 1, 2010
    Applicant: Bayer MaterialScience AG
    Inventors: Timm Schmidt, Tim Loddenkemper, Frank Gerhartz, Walther Müller
  • PROCESSES FOR REGENERATING SULFUR-POISONED, RUTHENIUM AND/OR RUTHENIUM COMPOUND-CONTAINING CATALYSTS
    Publication number: 20090239736
    Abstract: Processes comprising: providing a catalyst comprising a catalytic component selected from the group consisting of ruthenium, ruthenium compounds, and combinations thereof, wherein the catalyst is sulfur-poisoned with one or more sulfur compounds; and treating the catalyst with a gas stream comprising a hydrogen halide under nonoxidative conditions such that the catalyst is regenerated.
    Type: Application
    Filed: March 23, 2009
    Publication date: September 24, 2009
    Applicant: Bayer MaterialScience AG
    Inventors: Timm Schmidt, Tim Loddenkemper, Frank Gerhartz, Walther Muller