Patents by Inventor Hermann Thelen

Hermann Thelen 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).

  • Gas phase aromatic hydrogenation using palladium lithium aluminum spinel catalyst
    Patent number: 4115462
    Abstract: Process for the preparation of cycloaliphatic hydrocarbons by gas phase hydrogenation of aromatic hydrocarbons in the presence of palladium catalyst, characterized in that palladium catalyst is used which contains the palladium applied to a support which comprises aluminium oxide of which at least 20% by weight, relative to the weight of the support, has been converted to lithium-aluminium spinel. The gas phase hydrogenation can be carried out at atmospheric pressure.
    Type: Grant
    Filed: April 19, 1977
    Date of Patent: September 19, 1978
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Thelen, Kurt Halcour, Wulf Schwerdtel, Wolfgang Swodenk
  • Catalyst for the preparation of cyclohexanone from phenol and process therefor
    Patent number: 3932514
    Abstract: A palladium catalyst on an aluminum spinel carrier is used to selectively hydrogenate phenol to cyclohexanone.
    Type: Grant
    Filed: February 23, 1973
    Date of Patent: January 13, 1976
    Assignee: Bayer Aktiengesellschaft
    Inventors: Hermann Thelen, Kurt Halcour, Wulf Schwerdtel, Wolfgang Swodenk