Patents by Inventor Nils Folke Rune Lindstrom

Nils Folke Rune Lindstrom 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 for the electrolytic recovery of Sb, As, Hg and/or Sn
    Patent number: 4017369
    Abstract: The invention relates to a method for selectively leaching at least one of the elements antimony, mercury, arsenic and tin from sulphidic and oxidic materials with alkali sulphide solutions and subsequent electrolytic recovery of the leached elements. The method consists of maintaining the sulphide ion concentration in mol/l multiplied by two and the hydroxyl ion concentration in mol/l at a value of at least 8 and that the quantity of hydroxyl ions is at least in a quantity equimolar to the quantity of sulphide ions. The electrolyses must be effected at an anode current density of more than 1500 A/m2.
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: April 12, 1977
    Assignee: Boliden Aktiebolag
    Inventor: Nils Folke Rune Lindstrom