Patents by Inventor Siegfried Zingel

Siegfried Zingel 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).

  • Reactor for corrosive reaction mixtures
    Patent number: 5899566
    Abstract: A reactor for corrosive and abrasive reaction mixtures having an upper setion and a conically tapered lower reaction section, with a screw mixer consisting of a jacketed band surrounding a conveyor screw, suspended fron the top of the reactor, and an inlet for solid reactants which leads directly into the vertical conveying device.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: May 4, 1999
    Assignee: Bayer Aktiengesellschaft
    Inventors: Siegfried Zingel, Wilfried Burow, Martin Anstock, Dieter Zeitz, Olaf Schmidt-Park
  • Process for the preparation of benzoyl chloride
    Patent number: 4430181
    Abstract: Benzoyl chloride is prepared by a process in which the high-boiling residue obtained in the catalytic oxidation of toluene with oxygen or oxygen-containing gases in the liquid phase is largely freed of heavy metal salts which are present, and is then chlorinated at elevated temperatures, optionally under the action of light, and the benzoyl chloride is then separated off.
    Type: Grant
    Filed: October 22, 1982
    Date of Patent: February 7, 1984
    Assignee: Bayer Aktiengesellschaft
    Inventors: Rainer Neumann, Karl Morgenstern, Karl-August Lipper, Friedrich Bruhne, Walter Bockmann, Clemens Casper, Siegfried Zingel