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Integrated process for the recovery of yttrium and europium from CRT phosphor waste

机译：从CRT荧光粉废料中回收钇和euro的综合工艺

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摘要

An integrated process flow sheet for the recovery of yttrium and europium from waste cathode-ray tube (CRT) phosphors was developed. This flow sheet is based on a sequence of roasting, leaching with organic acids and precipitation steps. Zinc was efficiently removed from the roasted CRT phosphors by leaching with acetic acid, giving access to the rare earth content. Yttrium and europium were quantitatively leached from the residue by a 1 mol L ~(?1) methanesulphonic acid (MSA) solution. Precipitation with oxalic acid gave a mixed Y/Eu oxalate of high purity (>99 wt%). Co-precipitation of zinc was less than 2 wt%.
机译：开发了一种用于从废阴极射线管（CRT）荧光粉中回收钇和euro的综合工艺流程图。该流程图基于一系列的焙烧，有机酸浸出和沉淀步骤。通过用乙酸浸出可有效地从烤制CRT磷光体中除去锌，从而获得稀土成分。用1 mol L〜（？1）甲磺酸（MSA）溶液从残留物中定量浸出钇和euro。用草酸沉淀得到高纯度（＞ 99wt％）的混合的Y / Eu草酸酯。锌的共沉淀小于2重量％。

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