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Extraktionsverfahren zur abtrennung von europium(III) und yttrium(III) aus luminophorenstaub und-schlamm
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SYSNO ASEP 0340911 Document Type P - Patent R&D Document Type Patent or other outcome protected by special legislation Title Extraktionsverfahren zur abtrennung von europium(III) und yttrium(III) aus luminophorenstaub und-schlamm Title Method of Extraction of Europium(III) and/or Yttrium(III) Ions from Concentrate of Luminophore Dust or Sludge Author(s) Gruber, Václav (UCHP-M) RID, SAI Year of issue 2009 Possible third party use of the result A - Pro využití výsledku jiným subjektem je vždy nutné nabytí licence Royalty requested A - Poskytovatel licence požaduje licenční poplatek Patent no. or utility model no. or industrial design no. EP 1817437/AT E 426 684 Date of the patent acceptance 12.10.2009 Name of the patent owner Ústav chemických procesů AV ČR, v. v. i Current use A - Pouze udělený (dosud nevyužívaný) patent nebo patent využívaný jeho vlastníkem Language ger - German Country AT - Austria Keywords selective extraction ; recycling technologies ; ecological reprocessing Subject RIV CI - Industrial Chemistry, Chemical Engineering CEZ AV0Z40720504 - UCHP-M (2005-2011) Annotation 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. Description in English 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. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2010
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