Patents by Inventor Wilhelm F. Pietzarka

Wilhelm F. Pietzarka 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).

  • Process for cooling and comminuting molten calcium carbide
    Patent number: 4508666
    Abstract: The invention relates to a process comprising the cooling and comminuting of molten calcium carbide, wherein a molten stream of calcium carbide is tapped off from a furnace at 1900.degree. to 2100.degree. C., cooled and comminuted. More particularly, the molten calcium carbide is initially comminuted into droplets and the droplets are cooled to less than 200.degree. C. The process can be carried out with the aid of an apparatus comprised of a heatable or coolable feed duct, a nozzle for comminuting the molten stream, and a series of fluidized bed cooling zones.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: April 2, 1985
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Wilhelm F. Pietzarka, Albrecht Malten, Georg Strauss