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本文对用ТВФ和ТВЭКС-ТВФ从硫酸溶液中萃取钪进行了研究。采用~(31)P和~(45)Sc核磁共振方法确定,在萃合物中没有P=O→Sc配位键存在。研究表明,在6mol/LH_2SO_4中,钪的萃取是按照在有机相中生成[Sc(SO_4)_3]~(3-)络合物的水合溶剂化机制进行的。Sc在ТВЭКС—TBФ中的分配系数比用液体TBФ时有所提高,这可以用TBФКС聚合物中的萃取剂的状态特性进行解释。
In this paper, the extraction of scandium from sulfuric acid solution using ТВФ and ТВЭКС-ТВФ was studied. The ~ (31) P and ~ (45) Sc nuclear magnetic resonance methods were used to determine the existence of no P = O → Sc coordination bond in the complex. The results show that in 6mol / LH_2SO_4, scandium extraction is carried out according to the hydration solvation mechanism of [Sc (SO_4) _3] ~ (3-) complex in organic phase. The partition coefficient of Sc in ТВЭКС-TBФ is higher than that of liquid TBФ, which can be explained by the state characteristics of the extractant in TBФКС polymer.