Patents by Inventor Uwe Brand

Uwe Brand 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).

  • Processing polycaprolactam extraction liquors
    Patent number: 3992372
    Abstract: A process for processing polycaprolactam extraction liquors by evaporation of water and distillation of the residue in which the evaporation of water is carried out in a plurality of stages and the evaporation energy for the removal of the bulk of the water is taken from the heat liberated in the rearrangement of cyclohexanone oxime to caprolactam in oleum or sulfuric acid by using the extraction water for cooling the rearrangement mixture and utilizing the heat absorbed by the extraction water for the concentration of this extraction water by evaporation of water.
    Type: Grant
    Filed: March 20, 1975
    Date of Patent: November 16, 1976
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudolph Hans Gath, Hugo Fuchs, Ruediger Schmitz, Klaus Kartte, Uwe Brand