Patents Assigned to SAMIM Societa Azionaria Minero Metallurgica S.p.A.
  • Process for the separation of indium from anidic solutions containing it
    Patent number: 4806249
    Abstract: The invention relates to the separation of indium from acidic solutions containing it, by means of the formation of complex compounds with complexing substances supported on either planar or tubular membranes, of ploymeric character, and of the de-complexing of the same, followed by a re-extraction or stripping with acidic solutions, which may be either of the same type of, or different from the starting solutions.
    Type: Grant
    Filed: December 22, 1987
    Date of Patent: February 21, 1989
    Assignee: Samim Societa Azionaria Minero-Metallurgica S.p.A.
    Inventors: Renato Guerriero, Letizia Meregalli, Italo Vittadini
  • Process for the separation of arsenic from acid solutions containing it
    Patent number: 4547346
    Abstract: Process for the separation of arsenic from acid aqueous solutions containing arsenic and other metals characterized in that the acid aqueous solution is placed in the contact with water-immiscible organic solvent which extracts the arsenic, the arsenic being reextracted from the organic solvent by means of a countersolvent.
    Type: Grant
    Filed: July 3, 1984
    Date of Patent: October 15, 1985
    Assignee: SAMIM Societa Azionaria Minero-Metallurgica S.p.A.
    Inventors: Renato Guerriero, Giuseppe Veronese, Agostino Baradel, Luigi Rivola
  • Electrolytic cells
    Patent number: 4411760
    Abstract: To solve pollution problems in electrolytic cells for the production of zinc by electrolyzing a solution of a zinc salt, shielding baffles are provided above the cell anodes, the gap between adjoining baffles being such as to provide a satisfactory tight seal while permitting the evacuation of noxious gases and mists through manifolds formed through the cell walls.
    Type: Grant
    Filed: May 13, 1981
    Date of Patent: October 25, 1983
    Assignee: SAMIM Societa Azionaria Minero Metallurgica S.p.A.
    Inventors: Renato Guerriero, Italo Vittadini