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研究了二环己基１８ 冠６（ＤＣＨ１８Ｃ６）－正辛醇从硝酸溶液和模拟高放废液中镅、钚、铀的萃取。考察了酸度和模拟高放废液（ＨＬＬＷ）的稀释倍数对萃取分配比的影响。研究结果表明，在低硝酸浓度和较大稀释倍数情况下，ＤＣＨ１８Ｃ６ 对镅、钚、铀的萃取分配比都比较小，并随着水相硝酸浓度的增大而增大，随着模拟高放废液稀释倍数的增大而减小；提高萃取剂浓度会增大四价钚的萃取。
The extraction of plutonium, plutonium and uranium from dicyclohexyl 18 crown 6 (DCH18C6) -n-octanol from nitric acid solution and simulated high-level liquid waste was studied. The effects of acidity and dilution ratio of HLLW on extraction partition ratio were investigated. The results show that DCH18C6 has a relatively small extraction and distribution ratio of plutonium, plutonium and uranium at low nitric acid concentration and large dilution times, and increases with the increase of nitric acid concentration in the aqueous phase. Waste dilution increased with the decrease; increase extractant concentration will increase the extraction of tetravalent plutonium.