【摘要】 以气态配合物LnAlnCl3n + 3(Ln =镧系元素 )为载体 ,研究了从氟碳铈矿精矿中提取分离稀土元素的分步氯化 化学气相传输反应。精矿加热至 80 0K ,然后在 80 0～ 13 0 0K氯化。生成的氯化物在 13 0 0K与配体反应生成气态配合物 ,并化学传输分离 6h ,CaCl2 和BaCl2 留在残渣中。研究结果表明 ,递减温度场和波浪形温度场中的化学传输反应呈现明显不同的特性更多还原

【Abstract】 Vapor phase extraction and mutual separation of rare earth elements from bastnaesite concentrate were investigated using stepwise chlorination chemical vapor transport reactions mediated by vapor complexes LnAl n Cl 3 n +3 . The bastnaesite was heated to 800 K and chlorinated between 800～1300 K. At T =1300 K for 6 h, the resulting RE chlorides are chemically transported and mutual separated with the vapor complexes while CaCl 2 and BaCl 2 are remained in the residues. Significantly different chemical vapor transport characteristics are observed along gradually reduced and periodically varied temperature gradients.更多还原