【摘要】 N,N,N’,N’-四辛基-3-氧戊二酰胺（TODGA）是目前研究最多的酰胺荚醚类萃取剂，但其萃取An（Ⅲ）与Ln（Ⅲ）的能力强，导致反萃困难。为此，设计了以N,N,N’,N’-四辛基-2-甲基-3-氧戊二酰胺（Me-TODGA）为萃取剂的酰胺荚醚流程，并采用模拟高放废液（SHLLW）对该流程进行验证。结果表明：经过6级萃取和10级洗涤，SHLLW中三、四价金属离子的萃取率均大于99.5%；采用0.3 mol/L HNO₃经过16级反萃，An（Ⅲ）与Ln（Ⅲ）的反萃率在95%以上，Zr⁴⁺的反萃率为68.0%，其它金属离子的浓度均低于初始浓度的2.1%。该流程实现了较高酸度（0.3 mol/L HNO₃）条件下An（Ⅲ）与Ln（Ⅲ）的反萃，减少了界面污物的产生，为酰胺荚醚流程的设计及应用提供了基础数据。更多还原

【Abstract】 N,N,N’,N’-tetraoctyl-3-oxapentanediamide（TODGA） is the most studied extractant among diglycolamides,but its extraction ability for An（Ⅲ） and Ln（Ⅲ） is too strong,making the stripping of An（Ⅲ） and Ln（Ⅲ） is difficult.In this paper,a novel diglycolamides process employing N,N,N’,N’-tetraoctyl-2-methyl-3-oxapentanediamide（Me-TODGA） was designed as the extractant.The process was verified using simulated high level liquid waste（SHLLW）.The results show that the extraction rate of trivalent and tetravalent metal ions exceeds 99.5% after 6-stage extraction and 10-stage scrubbing.After16-stage stripping with 0.3 mol/L nitric acid,the stripping rates of An（Ⅲ） and Ln（Ⅲ） are over 95%,the stripping rate of Zr⁴⁺is 68.0%,and the concentrations of other metal ions are all lower than 2.1% of the initial concentration.This process enables efficient stripping of An（Ⅲ） and Ln（Ⅲ） under higher acidity（0.3 mol/L nitric acid）,which reduces the generation of interfacial crud,and provides basic data for the design and application of the diglycolamides process.更多还原