Patents by Inventor Frederick van Laar

Frederick van Laar 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 the production of amines
    Patent number: 7091383
    Abstract: The invention provides a process for preparing amines by catalytic hydrogenation of nitroaromatics and subsequent removal of the catalysts from the reaction mixture, which contains at least one aromatic amine and water, which comprises carrying out the removal of the catalysts by means of membrane filtration, which is carried out at a pressure on the suspension side of from 5 to 50 bar, a pressure difference between the suspension side and the permeate side of at least 0.3 bar and a flux rate on the suspension side of from 1 to 6 m/s.
    Type: Grant
    Filed: January 30, 2003
    Date of Patent: August 15, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Dominic Vanoppen, Ekkehard Schwab, Frederick van Laar, Hartwig Voss, Steffen Oehlenschlaeger, Wolfgang Mackenroth, Konrad Morgenschweis, Ulrich Penzel, Bernd Weidner