| 摘要 |
A procedure is given for recovering yttrium and europium from phosphors or solutions which have become contaminated. An acid solution containing the yttrium, europium and impurities is passed through a cation resin exchange column, the resin holding the yttrium, europium and certain impurities. The impurities are then eluted from the resin with a relatively weak hydrochloric acid solution. Yttrium and europium are subsequently stripped from the resin exchange column using a more concentrated hydrochloric acid solution. The hydrochloric acid solution containing the yttrium and europium is heated with oxalic acid to produce yttrium and europium oxalate and the oxalate is fired to produce yttrium and europium oxide.
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