Patents by Inventor Juergen Widmer

Juergen Widmer 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 preparing diketonato-rhodium(I)-carbonyl complexes
    Patent number: 9163045
    Abstract: The invention relates to a process for preparing diketonato-rhodium(I)-carbonyl complexes, especially diketonato-rhodium(I)-triorganophosphine-carbonyl complexes, for example Rh(CO)(PPh3)acac. The process according to the invention is a “one-pot synthesis” and features a process procedure without intermediate isolation stages. After introduction of an Rh(III) halide precursor into a solvent and sparging with carbon monoxide (CO), a diketo compound of the R?—C(?O)—CH2—C(?O)—R? type and a base are added, forming the intermediate compound diketonato-Rh(CO)2. After addition of a triorganophosphine of the PR3 type, the reaction mixture is heated and the diketonatocarbonyltriorganophosphine-rhodium(I) complex is removed. The process enables a rapid operation and a high yield. The complex Rh(CO)(PPh3)acac prepared in accordance with the invention, because of its purity, is particularly suitable as a catalyst or precatalyst for homogeneous catalysis, for example for hydroformylation reactions.
    Type: Grant
    Filed: April 25, 2013
    Date of Patent: October 20, 2015
    Assignee: UMICORE AG & CO. KG
    Inventors: Eileen Woerner, Timo Ebert, Ralf Karch, Andreas Rivas-Nass, Angelino Doppiu, Juergen Widmer
  • PROCESS FOR PREPARING DIKETONATO-RHODIUM(I)-CARBONYL COMPLEXES
    Publication number: 20150141685
    Abstract: The invention relates to a process for preparing diketonato-rhodium(I)-carbonyl complexes, especially diketonato-rhodium(I)-triorganophosphine-carbonyl complexes, for example Rh(CO)(PPh3)acac. The process according to the invention is a “one-pot synthesis” and features a process procedure without intermediate isolation stages. After introduction of an Rh(III) halide precursor into a solvent and sparging with carbon monoxide (CO), a diketo compound of the R?—C(?O)—CH2—C(?O)—R? type and a base are added, forming the intermediate compound diketonato-Rh(CO)2. After addition of a triorganophosphine of the PR3 type, the reaction mixture is heated and the diketonatocarbonyltriorganophosphine-rhodium(I) complex is removed. The process enables a rapid operation and a high yield. The complex Rh(CO)(PPh3)acac prepared in accordance with the invention, because of its purity, is particularly suitable as a catalyst or precatalyst for homogeneous catalysis, for example for hydroformylation reactions.
    Type: Application
    Filed: April 25, 2013
    Publication date: May 21, 2015
    Inventors: Eileen Woerner, Timo Ebert, Ralf Karch, Andreas Rivas-Nass, Angelino Doppiu, Juergen Widmer
  • Diene-bis-aquo-rhodium(I) complexes, process for preparing them and their use
    Patent number: 7312349
    Abstract: Diene-bis-aquo-rhodium(I) complex of the general formula [Rh(diene)(H2O)2]X where diene is a cyclic diene and X is a noncoordinating anion.
    Type: Grant
    Filed: August 10, 2004
    Date of Patent: December 25, 2007
    Assignee: Umicore AG & Co. KG
    Inventors: Andreas Rivas-Nass, Gerhard Peter, Jürgen Widmer, Ralf Karch, Oliver Briel