【摘要】 少铕氯化稀土溶液用碳酸钠及助沉剂沉淀,沉淀物经500℃焙烧一小时,铈的氧化率大于95％。焙烧物用稀硫酸浸出,浸出液用P₂₀₄-煤油萃取四价铈。负载有机相经还原反萃,草酸沉淀,高温灼烧。灼烧物光谱分析结果表明,氧化铈的纯度达99.95％,萃余水相用复盐碱转盐酸溶解制备少铈富镧氯化稀土。更多还原

【Abstract】 The reaction of solution of rare earth choride containing low amount Eu with sodium carbonate and helping-precipitated solvant leads to precipitation. The precipitation is burned at 500℃ for an hour. The rate of oxidation of Cerium(Ⅲ) is above 95％. The burned product is leached in sulphate acid. Cerium (Ⅳ) in leaching solution is extracted with Di(2- ethylhexyl) phosphoric acid in kerosene . The purity of Ceric oxide by means of spectral analysis is up to 99.95％.更多还原