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结合处理高放废液的ＣＭＰ流程，研究在０．３－０．５ｍｏｌ／ｌＨＮＯ＿３介质中不经酸度调节直接进行钢系元素分离。结果表明，采用１．０ｍｏｌ／ｌＨＤＥＨＰ－煤油和１．５ｍｏｌ／ｌＨＤＥＨＰ－煤油为萃取有机相均可从０．３－０．５ｍｏｌ／ｌＨＮＯ＿３，Ａｎ￣（３＋）、Ｌｎ￣（３＋）总浓度为０．０２－０．１０ｍｏｌ／ｌ的料液中共革Ａｎ￣（３＋）和Ｌｎ￣（３＋）。不对料液酸度进行调节，选用１．５ｍｏｌ／ｌＨＤＥＨＰ－煤油进行Ａｎ￣（３＋）、Ｌｎ￣（３＋）共萃更适宜。以０．１５ｍｏｌ／ＤＴＰＡ－２ｍｏｌ／ｌ乳酸，ｐＨ＝３．５的溶液作为反萃液，可从１．５ｍｏｌ／ｌＨＤＥＨＰ－煤油中选择反萃Ａｍ￣（３＋），实现Ａｍ￣（３＋）与Ｌｎ￣（３＋）的分离，升高温度和降低相比都有利于反萃。相比ｌ：１，温度为２５－３５℃是适宜的操作条件。有机相为１．５ｍｏｌ／ｌＨＤＥＨＰ－煤油，水相为０．０６ｍｏｌ／ｌＧｄ￣（３＋）及指示剂量￣（１５３）Ｇｄ、￣（１５２）Ｅｕ和￣（２４１）Ａｍ，经７次逆流萃取，２级洗涤，９９．８％的Ａｍ和约１００％Ｇｄ、Ｅｕ进入有机相；用０．１５ｍｏｌ／ｌＤＴＰＡ－２ｍｏｌ１／ｌ乳酸，ｐＨ＝３．５的溶液作为反萃液，经?
Combining with the CMP process of treating high level liquid waste, the separation of steel elements was investigated directly in the medium of 0.3-0.5 mol / l of HNO 3 without adjusting the acidity. The results showed that using 1.0mol / lHDEHP-kerosene and 1.5mol / lHDEHP-kerosene as extraction organic phase, the total concentration of organic phase from 0.3-0.5mol / lHNO3, An¯3 +, Ln¯3+ 0.02-0.10 mol / l of the feedstocks An¯ (3+) and Ln¯ (3+). Liquid acidity is not adjusted, choose 1.5mol / lHDEHP-kerosene An¯ (3 +), Ln¯ (3+) co-extraction is more appropriate. Amtris (3+) can be selectively stripped from 1.5mol / l HDEHP-kerosene by using 0.15mol / L DTPA-2mol / L lactic acid and pH = 3.5 as the stripping solution. Compared with the separation of Ln¯ (3+), both the temperature rise and the reduction are favorable to stripping. Compared to l: 1, the temperature is 25-35 ℃ is the appropriate operating conditions. The organic phase was 1.5mol / l HDEHP-kerosene, the aqueous phase was 0.06mol / lGd¯ (3+) and the indicator dose (153) Gd, Level 2 washing, 99.8% Am and about 100% Gd, Eu into the organic phase; with 0.15mol / l DTPA-2mol1 / l lactic acid, pH = 3.5 solution as stripping solution,