The process of preparing polyantimonic acid exchanger by oxidative reflux method from antimonous oxide using hydrogen peroxide solution as oxidant was studied. This kind of ion-exchange material has a high selectivity to Sr~(2+) over Y~(3+) among other inorganic ion exchangers that have been reported when the ion-exchange material is used as a separating medium in Sr~(2+)-Y~(3+) solution. The condition of the preparation was investigated by orthogonal experimental method. The optimum reaction conditions of gaining higher distribution coefficients for Sr~(2+) and Y~(3+) are as follows: reaction temperature 60 ℃, 40 mL aqueous and 12 mL hydrogen peroxide solution were mixed with 10 g antimonous oxide, reaction time 120 min. Physicochemical properties of polyantimonic acid exchanger were also studied. The results show that the polyantimonic acid is a kind of cation exchanger.%以三氧化二锑为原料,双氧水为氧化剂,经氧化回流法制备聚锑酸无机离子交换剂.该聚锑酸离子交换剂对锶-钇混合溶液中的锶具有较好的选择性吸附能力.通过正交实验设计法对反应影响因素进行了优化,结果表明,在60 ℃时加入40 mL水和12 mL H_2O_2氧化10 g Sb_2O_3固体,反应120 min可制得对Sr~(2+)和Y~(3+)具有较高分离系数的聚锑酸离子交换剂.理化性能研究表明,产物是一种阳离子交换剂,对溶液中的Sr~(2+)和Y~(3+)的动态吸附分离具有较高的选择性.
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