聚锑酸离子交换剂的制备及分离锶和钇

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.

Preparation of Polyantimonic Acid Exchanger and Its Adsorption Separation of Strontium and Yttrium

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.