在热铀后处理萃取流程中,燃烧过的铀在用硝酸溶解后,~(106)Ru在溶液中主要以亚硝酰钌(RuNO~(3+))状态存在,Ru(Ⅳ)仅占1%左右,Ru-O-Ru含量更低,且稳定性也较差。亚硝酰钌异常稳定,它有较强的络合能力,通常形成硝酸基络合物、亚硝酸基络合物以及含水分子、氢氧基的混合配位络合物。特别是高硝酸基络合物与磷酸三丁酯(TBP)更易形成可萃络合物而难以与U,Pu分离,因此RuNO~(3+)一直是萃取过程中 In the heat uranium post-treatment extraction process, ~ (106) Ru exists mainly in the state of RuNO ~ (3+) after the combustion of uranium is dissolved in nitric acid. Ru (Ⅳ) only accounts for 1%, Ru-O-Ru content is lower, and the stability is also poor. Nitrosyl ruthenium is unusually stable, it has strong complexing ability, usually form nitric acid complex, nitrite complex and water molecules, hydroxyl mixed coordination complex. In particular, the high nitric acid complex and tributyl phosphate (TBP) are more likely to form extractable complexes and are difficult to separate from U and Pu, so RuNO ~ (3+) has been the extraction process