摘要
以化学气相传输法制取无水EuCl3,ErCl3和LuCl3。稀土氧化物为原料 ,无水氯化铝为氯化剂和传输介质。Ln2 O3与过量的氯化铝在3 0 0℃反应 ,生成LnCl3。LnCl3在高温与氯化铝反应生成气态配合物 ,该配合物在低温分解。控制适当的温度梯度场 ,可实现LnCl3与其他固体分离。残余氯化铝在 2 0 0℃加热除去。产物收率 >90 % ,纯度 >99 5%。利用化学气相传输法可获得纯度较高的无水LnCl3。
Anhydrous lanthanide chlorides LnCl 3 (Ln=Eu, Er, Lu), which are not easy to be prepared by other ways, were prepared by chemical vapor transport(CVT) method. Ln 2O 3 reacted with Al 2Cl 6 at 300 ℃ to produce LnCl 3, which was then separated from other solids by means of CVT at a temperature gradient from 400 to 180 ℃. Residual Al 2Cl 6(g) was removed by carriers of dry Cl 2 N 2 gases at 200 ℃. The yielding rates were more than 90%, and the purity of products was more than 99 5%.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2000年第1期74-75,共2页
Journal of the Chinese Society of Rare Earths
