Patents by Inventor Heikki Aukusti Tiitinen

Heikki Aukusti Tiitinen 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).

  • Hydrometallurgical process for the recovery of valuable components from the anode slime produced in the electrolytical refining of copper
    Patent number: 4002544
    Abstract: A hydrometallurgical process for the recovery of silver, selenium and tellurium from the anode slime produced in the electrolytic refining of copper or lead or from other raw materials bearing these metals, wherein the raw material and concentrated sulfuric acid or oleum are heated at approx. 160.degree.-300.degree. C, preferably 160.degree.-200.degree. C, in order to sulfate the nickel and the possible copper. The concentrated sulfuric acid in which the silver, selenium, barium, and tellurium present in the raw material have dissolved is separated from the undissolved solid material so that the sulfuric acid can be treated separately for the recovery of Ag, Se, and Te and the solid material separately for the recovery of valuable components present in it.
    Type: Grant
    Filed: October 1, 1975
    Date of Patent: January 11, 1977
    Assignee: Outokumpu Oy
    Inventors: Seppo Olavi Heimala, Olli Viljo Juhani Hyvarinen, Jorma Pentti Eenokki Kinnunen, Heikki Aukusti Tiitinen