Preparation method of polyantimonic acid ion-exchanger

Abstract

The invention discloses a preparation method of poly-antimonic acid ion exchanger. The method of the invention includes the following steps: 1) antimony trioxide oxidation: antimony trioxide is oxygenated under the presence of oxidants and prepares hydrated antimony pentoxide sol; 2) Oxide aging: aging the prepared hydrated antimony pentoxide sol 1- 30 days under constant temperature of 0 ~ 70 degreeC; 3) drying and exploring in order to form particles: drying the aged hydrated antimony pentoxide sol to poly-antimonic acid solid, putting it into thin nitric acid solution to explore particles and prepares poly-antimonic acid ion exchanger. The invention method has the following advantages: 1. mild preparation conditions and short reaction time; 2. simple installations, low requirements to equipment and easy operation process; 3. preparation process avoids the touch of toxic chemicals; 4. low-cost preparation process, less art operating cost and good adsorption properties of ion exchanger; 5. high selective adsorption capacity of the prepared poly-antimonic acid inorganic ion exchanger to Sr2+.

Description

technical field

[0001] The invention relates to a method for preparing polyantimonic acid ion exchangers. Background technique

[0002] 90 Sr is an important radionuclide in nuclear fission waste, separated and recovered 90 Sr can not only reduce the potential radioactive threat of nuclear waste to human beings, but also may turn waste into treasure. Inorganic ion exchangers have the advantages of acid resistance, high temperature resistance, radiation resistance, good selectivity, simple preparation, and easy operation, and have good application prospects in the separation of radioactive waste. to Sr 2+ A more selective inorganic ion exchanger is hydrated antimony pentoxide - polyantimonic acid, which can effectively adsorb radionuclides from acidic media 90 Sr. At present, the methods for preparing polyantimonic acid reported in the literature mainly use antimony pentachloride to hydrolyze under neutral or dilute acidic conditions, age at a certain temperature, and dr...