Abstract

Hetero polyanions, namely, P2W17O6110−, P2W18O626− and SiW11O398− were extracted by TBP/dodecane from HNO3 or HCl solution, as H10P2W17O61 in the case of P2W17O6110−. The distribution ratio of P2W17O6110− depended on both H+ concentration and ionic strength of aqueous solution, and free-TBP concentration in organic solution. Experimental equation was established for predicting the distribution ratio of P2W17O6110− in nitrate system.

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