Patents by Inventor Norbert Schopper

Norbert Schopper 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).

  • Method for recovering rhodium from reaction products of oxosynthesis
    Patent number: 6685896
    Abstract: The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydroformulation and to a catalyst for hydroformulation itself. The inventive method is characterized by the following: extraction of the organic solution with an aqueous phosphate solution or a phosphate solution, water washing, oxidative treatment of the organic phase, and extraction of the organic phase with an aqueous water-soluble arylphosphine solution.
    Type: Grant
    Filed: September 5, 2002
    Date of Patent: February 3, 2004
    Assignee: Celanese Chemicals Europe GmbH
    Inventors: Hans-Willi Bohnen, Richard Fischer, Mark Hewlett, Wolfgang Zgorzelski, Norbert Schopper
  • Method for recovering rhodium from reaction products of oxosynthesis
    Publication number: 20030119923
    Abstract: The invention relates to a method for separating and recovering rhodium from reaction products of oxosynthesis, especially reaction products containing cobalt. The invention also relates to the reuse of rhodium as a catalyst for hydroformulation and to a catalyst for hydroformulation itself. The inventive method is characterized by the following: extraction of the organic solution with an aqueous phosphate solution or a phosphate solution, water washing, oxidative treatment of the organic phase, and extraction of the organic phase with an aqueous water-soluble arylphosphine solution.
    Type: Application
    Filed: September 5, 2002
    Publication date: June 26, 2003
    Inventors: Hans-Willi Bohnen, Richard Fischer, Mark Hewlett, Wolfgang Zgorzelski, Norbert Schopper