新型含磷无机离子交换剂的研究(Ⅱ)——焦磷亚硒酸锡的合成及性质

Studies on Inorganic Ion Exchanger Containing Phosphorus(Ⅱ)——Synthesis and Properties of Stannic Selenopyrophosphate

通过合成、化学组成、离子交换容量、热分析、分配系数及红外、X射线衍射、激光拉曼光谱分析,表明焦磷亚硒酸锡是一种交换容量大、热稳定及化学稳定性好的新型无机阳离子交换剂。对Ag(Ⅰ)、Pb(Ⅱ)、Ba(Ⅱ)、Bi(Ⅲ)及Zr(Ⅳ)具有高选择性。

A new inorganic ion exchanger--stannic selenopyrophosphate has beensynthesized. The studies on its chemical composition, ion exchange capacity, pH titration,thermal and chemical stability,distribution coefficients of thirty seven metal ions, IR, Raman spectrometry and X-ray analysis show that it is a polyfunctional cation exchanger possessing high ion exchange capacity and good chemical stability. It has a high affinity for Ag(Ⅰ), Pb( Ⅱ ), Ba( Ⅱ ), Bi( Ⅲ ) and Zr(Ⅳ).An empirical formula representing the relationship of ion exchange capacity of alkali and alkaline earth metal ions with bare radii and charges has been proposed. And a possible chemical formula of stannic selenopyrophosphate has also been inferred.