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Extraktionsverfahren zur abtrennung von europium(III) und yttrium(III) aus luminophorenstaub und-schlamm

  1. 1.
    0340911 - ÚCHP 2010 RIV AT ger P - Patent Document
    Gruber, Václav
    Extraktionsverfahren zur abtrennung von europium(III) und yttrium(III) aus luminophorenstaub und-schlamm.
    [Method of Extraction of Europium(III) and/or Yttrium(III) Ions from Concentrate of Luminophore Dust or Sludge.]
    Wien: Haffner und Keschmann Patentwälte, 2009. Owner: Ústav chemických procesů AV ČR, v. v. i. Date of the patent registration: 24.11.2005. Date of the patent acceptance: 12.10.2009. Patent Number: EP 1817437/AT E 426 684
    Institutional research plan: CEZ:AV0Z40720504
    Keywords : selective extraction * recycling technologies * ecological reprocessing
    Subject RIV: CI - Industrial Chemistry, Chemical Engineering

    Die Erfindung betrifft die selektive Isolierung von Yttrium- und Europium-Salzen aus dem Konzentrat von Luminophoren, welches mittels einer anorganischen Säure extrahiert wurde, bevorzugt mittels Salzäure oder Salpetersäure. Das Konzentrat der Luminophoren wird beim Recycling verwendetr Bildschirme von Farbfernsehgeräten oder Monitoren erhalten.

    The invention relates to a method of selective extraction of europium(III) and/or yttrium(III) from luminophore dust and sludge, the major components of which are oxides and sulphides of zinc, cadmium, yttrium and europium. From the concentrate of luminophore dust or sludge an aqueous solution is prepared and is subsequently contacted with an extraction agent, which is alkylphosphoric or dialkylphosphoric acid, either pure or diluted with organic solvent. The reaction equilibrium is strongly dependent on equilibrium concentration of the free acid in the aqueous phase of the reaction. After separating aqueous and organic phase after the extraction the europium(III) and yttrium(III) ions are recovered from the organic phase.
    Permanent Link: http://hdl.handle.net/11104/0184056

     
     
Number of the records: 1  

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