Patents by Inventor Klaus Schöffel

Klaus Schöffel 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 for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide
    Patent number: 8992870
    Abstract: The present invention relates to a catalyst comprising 0.1-10 mol % Co3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support for decomposition of N2O in gases containing NO. The catalyst may also contain 0.01-2 weight % ZrO2. The invention further comprises a method for performing a process comprising formation of N2O. The N2O containing gas is brought in contact with a catalyst comprising 0.1-10 mol % Co3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support, at 250-1000° C. The method may comprise that ammonia is oxidized in presence of an oxidation catalyst and that the thereby formed gas mixture is brought in contact with the catalyst comprising the cobalt component on cerium oxide support at a temperature of 500-1000° C.
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: March 31, 2015
    Assignee: Yara International ASA
    Inventors: Øystein Nirisen, Klaus Schöffel, David Waller, Dag Øvrebø
  • Catalyst for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide
    Publication number: 20110110835
    Abstract: The present invention relates to a catalyst comprising 0.1-10 mol % Co3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support for decomposition of N2O in gases containing NO. The catalyst may also contain 0.01-2 weight % ZrO2. The invention further comprises a method for performing a process comprising formation of N2O. The N2O containing gas is brought in contact with a catalyst comprising 0.1-10 mol % Co3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support, at 250-1000° C. The method may comprise that ammonia is oxidized in presence of an oxidation catalyst and that the thereby formed gas mixture is brought in contact with the catalyst comprising the cobalt component on cerium oxide support at a temperature of 500-1000° C.
    Type: Application
    Filed: October 26, 2009
    Publication date: May 12, 2011
    Inventors: Øystein Nirisen, Klaus Schöffel, David Waller, Dag Øvrebø
  • Catalyst for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide
    Publication number: 20100098611
    Abstract: The present invention relates to a catalyst comprising 0.1-10 mol % CO3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support for decomposition of N2O in gases containing NO. The catalyst may also contain 0.01-2 weight % ZrO2. The invention further comprises a method for performing a process comprising formation of N2O. The N2O containing gas is brought in contact with a catalyst comprising 0.1-10 mol % CO3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support, at 250-1000° C. The method may comprise that ammonia is oxidized in presence of an oxidation catalyst and that the thereby formed gas mixture is brought in contact with the catalyst comprising the cobalt component on cerium oxide support at a temperature of 500-1000° C.
    Type: Application
    Filed: October 26, 2009
    Publication date: April 22, 2010
    Inventors: Øystein Nirisen, Klaus Schöffel, David Waller, Dag Øvrebø
  • Catalyst for decomposing nitrous oxide and method for performing processes comprising formation of nitrous oxide
    Patent number: 7700519
    Abstract: The present invention relates to a catalyst comprising 0.1-10 mol % Co3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support for decomposition of N2O in gases containing NO. The catalyst may also contain 0.01-2 weight % ZrO2. The invention further comprises a method for performing a process comprising formation of N2O. The N2O containing gas is brought in contact with a catalyst comprising 0.1-10 mol % CO3-xMxO4, where M is Fe or Al and x=0-2, on a cerium oxide support, at 250-1000° C. The method may comprise that ammonia is oxidized in presence of an oxidation catalyst and that the thereby formed gas mixture is brought in contact with the catalyst comprising the cobalt component on cerium oxide support at a temperature of 500-1000° C.
    Type: Grant
    Filed: July 4, 2001
    Date of Patent: April 20, 2010
    Assignee: Yara International ASA
    Inventors: Øystein Nirisen, Klaus Schöffel, David Waller, Dag Øvrebø