Patents by Inventor Willem B. van den Berg

Willem B. van den Berg 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).

  • Two-phase spraying device and reaction chamber for the preparation of a product containing ammonium orthophosphate
    Patent number: 4370304
    Abstract: Ammonium orthophosphate products are prepared by reacting ammonia and phosphoric acid together at high speed under vigorous mixing conditions by spraying the reactants through a two-phase, dual coaxial mixer/sprayer and separately controlling the supply and axial outflow rate of the phosphoric acid at 1 to 10 m/sec. and the outflow rate of ammonia at 200 to 1000 m/sec. (N.T.P.). Thorough mixing and a homogeneous product is obtained by directing the outflow spray into a coaxial cylindrical reaction chamber of a specified size with respect to the diameter of the outermost duct of the sprayer/mixer. The product may be granulated on a moving bed of granules and adjusted in respect of the NH.sub.3 to H.sub.3 PO.sub.4 content by changing the concentration of the phosphoric acid and/or supplying additional ammonia to the granulation bed.
    Type: Grant
    Filed: August 21, 1981
    Date of Patent: January 25, 1983
    Assignee: Unie van Kunstmestfabrieken, B.V.
    Inventors: Petrus F. A. M. Hendriks, Arie Jansen, Willem B. van den Berg, Cornelis Hoek
  • Process and device for the preparation of a product containing ammonium orthophosphate, and product obtained by this process
    Patent number: 4313918
    Abstract: Ammonium orthophosphate products are prepared by reacting ammonia and phosphoric acid together at high speed under vigorous mixing conditions by spraying the reactants through a two-phase, dual coaxial mixer/sprayer and separately controlling the supply and axial outflow rate of the phosphoric acid at 1 to 10 m/sec. and the outflow rate of ammonia at 200 to 1000 m/sec. (N.T.P.). Thorough mixing and a homogeneous product is obtained by directing the outflow spray into a coaxial cylindrical reaction chamber of a specified size with respect to the diameter of the outermost duct of the sprayer/mixer. The product may be granulated on a moving bed of granules and adjusted in respect of the NH.sub.3 to H.sub.3 PO.sub.4 content by changing the concentration of the phosphoric acid and/or supplying additional ammonia to the granulation bed.
    Type: Grant
    Filed: May 29, 1979
    Date of Patent: February 2, 1982
    Assignee: Unie Van Kunstmestfabrieken, B.V.
    Inventors: Petrus F. A. M. Hendriks, Arie Jansen, Willem B. van den Berg, Cornelis Hoek