Patents by Inventor Juergen Grunert

Juergen Grunert 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).

  • Process for hydrogenating an aromatic amine in the presence of a supported ruthenium catalyst
    Patent number: 7507862
    Abstract: The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: March 24, 2009
    Assignee: Degussa AG
    Inventors: Guido Stochniol, Bernd Jaeger, Thomas Haas, Norbert Finke, Werner Burkhardt, Juergen Grunert
  • Process for the production of hydrogen peroxide
    Patent number: 7195748
    Abstract: The invention relates to a process for the production of hydrogen peroxide by the anthraquinone process, comprising a hydrogenation stage, an oxidation stage and an extraction stage. According to the invention, catalytic hydrogenation of anthraquinone derivatives dissolved in a working solution is carried out in the presence of added molecular oxygen. Per mol hydrogen, 0.1 to 10 mmol oxygen is preferably introduced into the hydrogenation stage with the hydrogenating gas, in mixture with an inert gas and/or dissolved and/or dispersed in the working solution. This increases the residence time of the catalyst.
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: March 27, 2007
    Assignee: Degussa AG
    Inventors: Bernd Jaeger, Thomas Haas, Jürgen Glenneberg, Jürgen Grunert
  • Process for hydrogenating an aromatic amine in the presence of a supported ruthenium catalyst
    Patent number: 7030052
    Abstract: The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: April 18, 2006
    Assignee: Degussa AG
    Inventors: Guido Stochniol, Bernd Jaeger, Thomas Haas, Norbert Finke, Werner Burkhardt, Juergen Grunert
  • Process for hydrogenating an aromatic amine in the presence of a supported ruthenium catalyst
    Publication number: 20060079717
    Abstract: The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
    Type: Application
    Filed: November 23, 2005
    Publication date: April 13, 2006
    Applicant: DEGUSSA AG
    Inventors: Guido Stochniol, Bernd Jaeger, Thomas Haas, Norbert Finke, Werner Burkhardt, Juergen Grunert
  • Process for hydrogenating an aromatic amine in the presence of a supported ruthenium catalyst
    Publication number: 20040034252
    Abstract: The invention relates to a process for hydrogenating an aromatic amine that has at least one amino group bound to an aromatic nucleus with hydrogen in the presence of a supported catalyst that contains at least ruthenium as active metal. The catalyst support has a BET surface area in the range from greater than 30 m2/g to less than 70 m2/g and more than 50% of the pore volume of the catalyst support is formed by macropores having a pore diameter of greater than 50 nm and less than 50% are mesopores having a pore diameter of 2 to 50 nm.
    Type: Application
    Filed: June 2, 2003
    Publication date: February 19, 2004
    Applicant: Degussa AG
    Inventors: Guido Stochniol, Bernd Jaeger, Thomas Haas, Norbert Finke, Werner Burkhardt, Juergen Grunert