Patents by Inventor Gunnar Thorsén

Gunnar Thorsén 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).

  • Extraction and separation of metals from solids using liquid cation exchangers
    Patent number: 4008134
    Abstract: Process for extraction and separation of metals utilizing the advantages of liquid-liquid extraction with cation exchangers without requiring the equivalent addition of alkali. The process is based on a combination of leaching the metal-containing raw materials with an organic acid (cation exchanger) and a subsequent use of the formed metal cationic complex in a liquid-liquid extraction process. In the said extraction process, the organic solution of metal complexes is used to recover and separate metal ions from an aqueous solution of metal salts.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: February 15, 1977
    Inventor: Gunnar Thorsen
  • Process for recovery of zinc values from zinc waste
    Patent number: 3958986
    Abstract: Process for recovery of zinc and other metal values from zinc waste or other metal waste containing chlorine and/or other anions forming undesirable metal salts. The waste is leached with a liquid organic phase containing a cation exchanger. The impurities are removed from the organic phase with water, and the zinc and other metal values are extracted from the organic phase with mineral acid. Thereafter the zinc and other metal values can be recovered with known methods.
    Type: Grant
    Filed: May 30, 1974
    Date of Patent: May 25, 1976
    Inventor: Gunnar Thorsen