Patents by Inventor Klaus Mathieu

Klaus Mathieu 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 recovering rhodium from the reaction products of the oxo synthesis
    Patent number: 5260490
    Abstract: A process for separating and recovering rhodium from oxo synthesis products comprising extracting under pressure an oxo synthesis product containing rhodium with an aqueous solution of a complexing organic phosphine to obtain a solution of a water-soluble phosphine substituted rhodium carbonyl compound.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: November 9, 1993
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Ingrid Forster, Klaus Mathieu
  • Catalysts and methods of separation thereof
    Patent number: 5124485
    Abstract: A method of preparation of a cobalt catalyst particularly adapted for hydrogenation of nitriles, the catalyst which is the product of the method, and the method of use thereof.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: June 23, 1992
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jurgen Weber, Volker Falk, Gerhardt Horn, Hanswilhelm Bach, Klaus Mathieu, Claus Kniep
  • Process for preparing 3(4),8(9)-bis(aminomethyl)-tricyclo[5.2.1.0.sup.2,6 ] d
    Patent number: 5041675
    Abstract: This invention relates to a process for preparing 3(4),8(9)-bis(aminomethyl)tricyclo[5.2.1.0.sup.2,6 ]decane. The starting material for the synthesis of this compound is dicyclopentadiene, which is hydroformylated in the presence of a rhodium compound and subjected to reductive amination without the hydroformylation catalyst being separated from the reaction mixture.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: August 20, 1991
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Rainer Lukas, Klaus Mathieu, Franz Thonnessen, Georg Dambkes, Hanswilhelm Bach