Patents by Inventor Vaino V. H. Hintikka

Vaino V. H. Hintikka 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: 4385038
    Abstract: A process is disclosed for the recovery of lead, silver and gold from the iron-bearing residue of an electrolytic zinc process by froth-flotating a slurry of the iron-bearing residue in the presence of a sulfidic collector agent in order to froth-flotate the sulfides and to separate them from the iron-bearing residue. The iron-bearing residue is sulfidized selectively in order to convert the lead, silver and possibly gold substantially quantitatively to sulfides before the iron-bearing residue is froth-flotated.
    Type: Grant
    Filed: September 29, 1981
    Date of Patent: May 24, 1983
    Assignee: Outokumpu Oy
    Inventors: Jussi K. Rastas, Kaarlo M. J. Saari, Vaino V. H. Hintikka, Jaakko O. Leppinen, Aimo E. Jarvinen
  • Patent number: 4368117
    Abstract: A process for the selective froth-flotation of sulfidic, oxidic and salt-type minerals, whereby an ore is first wet ground to the flotation fineness to obtain a slurry and then the obtained slurry is prepared and froth-flotated. In addition to the collector agent a polysaccharide, lignosulfonate, quargum and/or a surface active additional chemical is used which prevents the collector agent from adhering to the silicate surfaces and passivates active silicate mineral surfaces, or weakens the hydrophobia of minerals to which the collector agent has already adhered. The collector agent and the additional chemical may be added as early as the wet-grinding stage.
    Type: Grant
    Filed: February 18, 1981
    Date of Patent: January 11, 1983
    Assignee: Outokumpu Oy
    Inventor: Vaino V. H. Hintikka
  • Patent number: 4317715
    Abstract: A process for the separate recovery of phosphate and carbonate minerals from finely-divided phosphate-carbonate-silicate ores or concentrates with a carbonate to phosphate ratio of over 1 is disclosed, in which an anionic collector agent is added to an aqueous slurry of these ores and concentrates, the slurry is then exposed to froth-flotation in order to separate a silicate-bearing residue from phosphate-carbonate concentrate, thereafter(a) the combined phosphate-carbonate concentrate is either treated with a base in order to remove the collector-agent coatings from the surfaces of the mineral particles, whereafter the combined concentrate is froth-flotated with a cationic collector agent using a depressing agent for carbonate in order to recover the phosphate concentrate and the carbonate concentrate separately, or(b) the aqueous slurry to which the anionic collector agent has been added and which has been froth-flotated is treated with sulfur dioxide or carbon dioxide in order to inactivate the collector-a
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: March 2, 1982
    Assignee: Outokumpu Oy
    Inventors: Vaino V. H. Hintikka, Kaarlo M. J. Saari