Patents by Inventor Walter Pollwein

Walter Pollwein 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 the preparation of pure 2,6-dichlorobenzonitrile
    Patent number: 4582647
    Abstract: The present invention provides a process for the preparation of pure 2,6-dichlorobenzonitrile by the ammonoxidation of 2,6-dichlorotoluene in the presence of a catalyst based on vanadium-molybdenum oxide, wherein the reaction is carried out in a fluidized bed process and water is sprayed into the reaction gases after leaving the fluidized bed reactor.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: April 15, 1986
    Assignee: SKW Trostberg Aktiengesellschaft
    Inventors: Herbert Bayerl, Walter Pollwein