Patents Assigned to Mx-Processer Reinhardt & Co. AB
  • Re-extracting metal chloride complex from an organic extraction solution
    Patent number: 4203964
    Abstract: The invention relates to the re-extraction of a metal from an organic extraction solution in which the metal is present as a metal chloride complex bonded to an extractant. The organic extraction solution is contacted with an aqueous solution, to transfer metal ions and chloride ions to the aqueous solution. Sulphuric acid is added to the aqueous solution, which is subsequently heated to drive off hydrogen chloride and water. Metal sulphate is removed from the acidified aqueous solution.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: May 20, 1980
    Assignee: MX-Processer Reinhardt & Co. AB
    Inventors: Hans Reinhardt, Ulf V. Kuylenstierna
  • Recovering zinc from a material containing zinc and iron
    Patent number: 4124462
    Abstract: Zinc is recovered from a material containing zinc and iron. The material is leached with sulphuric acid to produce a final pH of 3-5.5. Zinc powder is added to the leaching solution to precipitate polluting metals. Zinc is now extracted with a solution of a dialkyl phosphoric acid in an organic solvent. Zinc is extracted from the organic solution with sulphuric acid. Zinc is recovered from the sulphuric acid solution as metal or as zinc sulphate.
    Type: Grant
    Filed: January 26, 1977
    Date of Patent: November 7, 1978
    Assignee: MX-Processer Reinhardt & Co. AB
    Inventors: Hans Reinhardt, Harald D. Ottertun, Sven O. S. Andersson
  • Selectively extracting copper, zinc, nickel from a mixture of metal hydroxides
    Patent number: 4105743
    Abstract: A mixture of metal hydroxides is leached with an ammoniacal carbonate solution, to dissolve nickel, copper and zinc. Metal is recovered from the leaching solution. The solid leaching residue is leached with sulphuric acid at a pH of 1.5- 3, to dissolve a further amount of nickel, copper and zinc. The acidic leaching solution is passed to the ammoniacal leaching process.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: August 8, 1978
    Assignee: Mx-Processer Reinhardt & Co. AB
    Inventors: Hans Reinhardt, Harald D. Ottertun, Sven O. S. Andersson