Patents by Inventor Hans G. Berg

Hans G. Berg 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: 4613365
    Abstract: The invention relates to a method for pyrometallurgically recovering the precious metal content, such as gold, silver and platinum metals, of halogen-bearing materials rich in silver. The material is caused to rapidly disperse in or be finely distributed throughout an at least partially molten charge containing a non-oxidic metal-containing phase having the ability to dissolve precious metals and to substantially lower their chemical activity. The halogen content of the material herewith reacts with any fluxes or metals of high chemical activity present in the furnace charge, while forming metal halogenides. The halogenides formed are separated by slagging and/or volatilization, and the precious metals are recovered from the molten charge, depleted of halogens, in a conventional manner and with regard to the charge phases.
    Type: Grant
    Filed: September 12, 1985
    Date of Patent: September 23, 1986
    Assignee: Boliden Aktiebolag
    Inventors: Hans G. Berg, Sven A. Holmstrom, Leif Johansson