Patents by Inventor Wilhelm Berkel

Wilhelm Berkel 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).

  • Partial or complete separation of gas mixtures, containing ammonia and carbon dioxide
    Patent number: 4013431
    Abstract: Gas mixtures containing ammonia and carbon dioxide are separated by fractional absorption in a solvent. The gas mixture and solvent are intimately mixed in a zone, the residence time of the gas in the mixing zone being restricted to a maximum of 0.1 second. Non-absorbed gas and solvent are then separated from one another and the gas separated off is subjected to a further absorption if necessary.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: March 22, 1977
    Assignee: BASF Aktiengesellschaft
    Inventors: Wilhelm Berkel, Hans Gettert