摘要
随着稀土在荧光和激光材料等领域的应用,对稀土纯度的要求越来越高,尤其是对非稀土杂质的含量要求越来越低。对稀土中非稀土杂质的分离去除,已有许多研究报导[1-3]。多是利用萃取剂对稀土和非稀土杂质的萃取能力不同而达到去除目的。分离因素较小,萃取级数都在20多级以上?..
The extraction natures of both Fe and Pb with N 235 in admixture with alcohol for preparation of high pure rare earth were studied.The extraction ratio of Fe and Pb increased with increasing N 235 concentration in organic solution and H + and Cl - ion concentration in aqueous solution,or with decreasing the alcohol concentration in organic solution.The above extractant scarcely extracted rare earth but existence of rare earth in aqueous solution contributed to extracting Fe and Pb.Both Fe and Pb could be removed from rare earth chloride solution and RE 2O 3 containing Fe 2O 3≤1×10 -4 % and PbO≤1×10 -4 % were obtained through multiple stages.
出处
《化学研究与应用》
CAS
CSCD
1999年第4期435-438,共4页
Chemical Research and Application
