Patents by Inventor Rolf Huller

Rolf Huller 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).

  • Patent number: 4423016
    Abstract: A process for producing dry flue gas gypsum substantially free of hemihydrate and anhydrous calcium sulfate comprises drying wet flue gas gypsum, typically having a free water content of about 4-12% by weight, in direct contact with a partial stream withdrawn from a primary stream of a dry dedusted flue gas. Flue gas gypsum produced in a wet desulfuration stage is fed to contact the partial stream and is separated from this partial stream and removed as dried flue gas gypsum. Remaining superfine flue gas gypsum is then fed to the intake side, or to the delivery side of a booster blower arranged upstream of the flue gas desulfuration device along with the partial flue gas stream discharged from the drying stage, and the superfine particulate flue gas gypsum is conducted from the booster blower into the flue gas desulfurizing device to serve as seed crystals for additional production of gypsum therein.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: December 27, 1983
    Inventors: Franz Wirsching, Rolf Huller, Barbel Limmer
  • Patent number: 4173610
    Abstract: Pelletized calcium sulfate is prepared from finely divided, natural or synthetic calcium sulfate, wherein the particle size of the finely divided calcium sulfate is at least about 90 per cent by weight less than 200 .mu.m, there being no particles larger than 500 .mu.m, and wherein the finely divided calcium sulfate has a free water content of from about 0.5 to about 4 per cent by weight, by pressing the finely divided calcium sulfate in the presence of water with a roll press using a surface pressure of 1 to 5 Mp per cm roller length.
    Type: Grant
    Filed: December 20, 1977
    Date of Patent: November 6, 1979
    Assignee: Gebr. Knauf Westdeutsche Gipswerke
    Inventors: Rolf Huller, Alfons Knauf, Franz Wirsching