Patents by Inventor Kayo Kangas

Kayo Kangas 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).

  • Continuous process for the purification of zinc plants electrolytes using copper arsenates
    Patent number: 4252622
    Abstract: Continuous process for the purification of zinc plant electrolyte employing copper arsenate for the removal of cobalt and associated impurities in a four-step treatment comprising:(1) cementation of copper with fine zinc dust,(2) precipitation of the major portion of cobalt by the addition of coarse zinc dust, dilute sulfuric acid and copper arsenate,(3) further addition of coarse zinc dust and dilute acid to precipitate more cobalt and reduce the cobalt level in said electrolyte to about 1.0 ppm, and(4) further addition of coarse zinc dust and dilute acid to reduce the cobalt level in said electrolyte to less than about 0.1 ppm.
    Type: Grant
    Filed: January 21, 1980
    Date of Patent: February 24, 1981
    Assignee: Texasgulf Inc.
    Inventors: George M. Freeman, Kayo Kangas
  • Process for the recovery of arsenic as a zinc arsenate and its _utilization in the purification of zinc plant electrolytes
    Patent number: 4240826
    Abstract: The invention described herein relates to metallurgical processes for the recovery of zinc arsenate from cement copper cake residues, and the use thereof in the purification of impure zinc electrolyte.
    Type: Grant
    Filed: September 13, 1979
    Date of Patent: December 23, 1980
    Assignee: Texasgulf Inc.
    Inventors: Kayo Kangas, John Mouland, Stan Timler