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(1)用0.04M的马尿酸-丁醇溶液作萃取剂萃取希土,在pH?6时,钇位于轻镧元素部分的钕与钐之间,其萃取率低于其他钇族希土元素.可借此性质自钇族希土中分离钇. (2)经过三级萃取,可自含70.5%Y_2O_3的钇族希土原料中,获得纯度为90.8—93.6%的Y_2O_3,收率约35%.当用二次循环萃取方式时,收率大约提高至55%. (3)研究了氨水添加量、萃取级数、溶液中希土浓度、水相与有机相的体积比等因素对萃取分离钇的影响。
(1) Using 0.04M hippuric acid-butanol solution as extractant to extract the rare earth, the yttrium is located between the neodymium and samarium of the lanthanum element at pH = 6, the extraction rate is lower than that of other yttrium compounds Yttrium can be separated from the yttrium-containing rare earth in this way. (2) After three-stage extraction, Y_2O_3 with the purity of 90.8-93.6% can be obtained from the yttrium-containing recycle raw material containing 70.5% Y_2O_3, the yield is about 35 %. When using the second cycle extraction, the yield increased to about 55%. (3) The effects of factors such as the amount of ammonia added, the extraction order, the concentration of the solution in the solution, the volume ratio of the aqueous phase to the organic phase, Effect of separating yttrium.