Patents by Inventor Jan-Olof Jansson

Jan-Olof Jansson 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).

  • Method of recovering non-ferrous metals from sulphidic materials
    Patent number: 4069041
    Abstract: A method for recovering copper and/or other non-ferrous metals from sulphidic raw material by roasting the material to a substantially sulphur-free state and then in a separate furnace sulphatize the roasted material into a form of a readily soluble sulphate and/or basic sulphate and then leaching the sulphatized material with an aqueous sulphuric acid solution. Copper and/or other non-ferrous metals are recovered from the spent leaching solution. The leaching solution is after said recovering recirculated to the leaching stage and to the roasting stage.
    Type: Grant
    Filed: June 24, 1976
    Date of Patent: January 17, 1978
    Assignee: Boliden Aktiebolag
    Inventors: Karl Goran Gorling, Ingvar A. O. Edenwall, Jan-Olof Jansson, Thomas K. Mioen