Patents by Inventor Andreas Pingel-Keuth

Andreas Pingel-Keuth 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).

  • Chemical process
    Patent number: 7576162
    Abstract: The invention relates to a process for the production of a nitrogen containing epihalohydrin polymer involving reaction of a nitrogen-containing precursor selected from the group consisting of amines, poly-amines, polyaminoamides, polyurethanes and mixtures thereof with epihalohydrin to form of a solution of said epihalohydrin polymer, the process comprising a purification step to remove organic impurities from the formed solution of the epihalohydrin polymer, said purification step comprising contacting the solution of the epihalohydrin polymer with a fluid under liquid, supercritical or near supercritical conditions to effect extraction of organic impurities from the solution of the epihalohydrin polymer to the fluid, withdrawing fluid enriched in organic impurities from the solution of the epihalohydrin polymer, and separating extracted impurities from the withdrawn fluid, wherein the fluid comprises a substance that at atmospheric pressure and room temperature (about 25° C.) is gaseous.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: August 18, 2009
    Assignees: Akzo Nobel N.V., Fraunhofer-Gesellschaft zur Forderung der Angewandten Forschung E.V.
    Inventors: Oliver Struck, Andreas Pingel-Keuth, Christian Przybyla, Ulrich Fehrenbacher, Thomas Hirth, Steffen Unser
  • Chemical process
    Publication number: 20070004901
    Abstract: The invention relates to a process for the production of a nitrogen containing epihalohydrin polymer involving reaction of a nitrogen-containing precursor selected from the group consisting of amines, poly-amines, polyaminoamides, polyurethanes and mixtures thereof with epihalohydrin to form of a solution of said epihalohydrin polymer, the process comprising a purification step to remove organic impurities from the formed solution of the epihalohydrin polymer, said purification step comprising contacting the solution of the epihalohydrin polymer with a fluid under liquid, supercritical or near supercritical conditions to effect extraction of organic impurities from the solution of the epihalohydrin polymer to the fluid, withdrawing fluid enriched in organic impurities from the solution of the epihalohydrin polymer, and separating extracted impurities from the withdrawn fluid, wherein the fluid comprises a substance that at atmospheric pressure and room temperature (about 25° C.) is gaseous.
    Type: Application
    Filed: June 21, 2006
    Publication date: January 4, 2007
    Applicant: AKZO NOBEL N.V.
    Inventors: Oliver Struck, Andreas Pingel-Keuth, Christian Przybyla, Ulrich Fehrenbacher, Thomas Hirth, Steffen Unser