【作者】 张丽清； 张凤春； 苏燕； 董小华； 于秀兰；

【Author】 Zhang Liqing~* Zhang Fengchun Su Yan Dong Xiaohua Yu Xiulan (College of Application Chemistry,Shengyang Institute of Chemical Engineering,Shengyang 110141,China)

【机构】 沈阳化工学院应用化学学院；

【摘要】 本文以氯化铵为氯化剂,湿空气为氧化剂,主要研究稀土氧化物的氯化-氧化反应特性,根据铈和非铈稀土元素氯化物的氧化产物不同实现 CeO₂的分离。考察了反应温度和反应时间对稀土氧化率的影响,经氯化反应生成的稀土氯化物的最佳氧化反应温度和时间分别为600℃和60 min,实验产物经 X 射线衍射分析,只有 CeO₂的衍射峰,实现了单一稀土 CeO₂的分离。更多还原

【Abstract】 A chlorination-oxidation process was performed from mixture of rare earth oxides using NH₄Cl as chlorination agent, wet-air as oxidant. Pure CeO₂ was separated from the mixture of rare earth oxides using cerium oxides and non-Ce rare elements. The effects of reaction temperature and time on rare earth oxidation yield were also studied. The optimum oxidizing conditions include: the reaching temperature is 600 ℃, time is 1 h. The X-ray diffraction pattern of residue indicates that there is only diffract peak of CeO₂, Therefore, the approach can be adopted to separate of CeO₂.更多还原