论文部分内容阅读
我们测定了水杨酸-丁醇萃取钍和十一个希土元素的萃取率,观察到在pH=5.5—7时钇的萃取率位于轻镧采元素的钕与钐之间,在同一pH值下,钇的萃取率较重镧系元素低,因此有可能从钇族希土元素中分离钇.这样,我们在半逆流连续萃取装置中进行了从钇族希土元素中分离钇的研究.系统地做了氨水加入量、水杨酸浓度、希土溶液浓度等条件试验.在适当的条件下经一次萃取,Y_2O_3纯度可从70%提高到95—98%,收率为57%左右.钇的交叉部分经二次循环,可得纯度大于95%的Y_2O_3,总收率为68%.因而证实了上面的推断是正确的,同时提出了一个成本便宜、操作简便,能连续、快速分离出纯度为95—98%的Y_2O_3的新方法.
We measured the extraction rate of salicylic acid-butanol extracted thorium and eleven rare earth elements. It was observed that the extraction rate of yttrium is between that of lanthanum-lanthanide element and samarium at pH = 5.5-7. At the same pH , It is possible to separate the yttrium from the yttrium-containing rare earth elements. Thus, we studied the separation of yttrium from the yttrium-containing rare earth elements in a semi-countercurrent continuous extraction unit The conditions of ammonia concentration, concentration of salicylic acid solution and concentration of rare earth solution were systematically investigated.The purity of Y_2O_3 can be increased from 70% to 95-98% after one extraction under proper conditions, and the yield is about 57% The yttrium crossover part was recycled twice to obtain Y2O3> 95%, the total yield was 68%, thus confirming the above conclusion is correct, and at the same time proposed a low cost, easy to operate, can be continuous, fast A new method of separating Y_2O_3 with 95-98% purity was developed.