Patents Assigned to MX Processor Reinhardt & Co. AB
  • Patent number: 4350667
    Abstract: Copper can be extracted from an ammoniacal copper solution by contacting said solution with an organic phase containing a first extraction reagent consisting of a beta-diketone as well as a second extraction reagent consisting of a hydroxy oxime, a hydroxy quinoline, or an alkylaryl sulphonamido quinoline. Alternatively, the copper solution can first be contacted with an organic phase containing the first extraction agent, and subsequently be contacted with an organic phase containing the second extraction reagent. It is possible to reach a low percentage of copper in the aqueous solution by using a low number of extraction steps.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: September 21, 1982
    Assignee: MX-Processor Reinhardt & Co AB
    Inventors: Sven O. S. Andersson, Harald D. Ottertun, Hans Reinhardt
  • Patent number: 3966569
    Abstract: Metal can be recovered from metal-containing waste by means of liquid extraction processes. The waste is leached with sulphuric acid. The resulting metal sulphate solution is contacted with an organic solution of a reagent, so as to extract iron and zinc to the organic solution. The organic solution is washed with sulphuric acid in two steps, viz. with weaker acid in the first step, so as to transfer zinc to the washing solution, and with stronger acid in the second step, so as to transfer iron to the washing solution. Zinc and iron have now been separated, and are recovered from the washing solutions in known ways, for example by crystallization. If the waste contains other metals, in addition to iron and zinc, additional selective liquid extraction processes are added, before or after the iron-zinc-extraction.
    Type: Grant
    Filed: February 25, 1975
    Date of Patent: June 29, 1976
    Assignee: MX Processor Reinhardt & Co. AB
    Inventors: Hans Reinhardt, Harald Daniel Ottertun