INORGANIC ION-EXCHANGERS BASED ON TITANIUM COMPOUNDS

摘要

This invention relates to a process for preparing inorganic ion-exchangers based on titanium compounds, consisting in preparing an alcoholic solution of an organometallic compound of titanium, optionally evaporating the solution, gelling the solution into gel particles or membranes by neutralization with an alkali, and optionally calcining the particles or membranes to provide bodies having ion-exchange activity and mechanical robustness. The procedure permits one to modify the chemical composition of the exchanger by introducing chemical elements into the alcoholic solution used at the start and/or by absorption by ion-exchange on gel of titanates or hydrous titanium oxides. Exemplified is the use of such exchangers in applications of nuclear interest such as for example the separation and immobilization of toxic nuclides contained in liquid radioactive wastes.