Abstract

Studies have been carried out to separate scandium and thorium from nitric acid solutions using two extraction systems 7.5% Cyanex 923 + 7.5% TBP and 40% TBP in kerosene for processing the primary scandium concentrate obtained from the circulating solutions of underground uranium leaching at JSC “Dalur.” Comparison of the values of the separation coefficients showed the fundamental possibility of using both systems for the separation of scandium and thorium. It was recommended to use a 40% solution of TBP in kerosene at the first stage of separation, and a mixture of extractants 7.5% Cyanex 923 + 7.5% TBP in kerosene at the stage of fine purification. For this system, higher scandium losses due to coextraction with thorium were noted. The possibility was demonstrated of increasing the degree of purification from radioactivity by adding 15% trialkylmethylammonium nitrate to the TBP solution.

中文翻译：

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铀原位浸出循环溶液制得的Con粗精矿中of和Thor的分离

摘要

已经进行了研究，使用两种萃取系统将硝酸溶液中的scan和th从硝酸溶液中分离出来，该萃取系统是将煤油中的7.5％Cyanex 923 + 7.5％TBP和40％TBP用于处理从JSC地下铀浸出循环溶液中获得的主要scan精矿。 Dalur。” 分离系数值的比较显示了使用两种系统分离dium和the的基本可能性。建议在分离的第一阶段使用TBP在煤油中的40％溶液，在精制阶段使用7.5％Cyanex 923 + 7.5％TBP在煤油中的萃取剂混合物。对于该系统，由于与th的共萃取而导致更高的scan损失。