PURPOSE: To increase lithium adsorption capacity and lithium selectivity by eluting lithium out of a multiple oxide of lithium and titanium and preparing a high performance lithium adsorbent represented by a given general formula.
CONSTITUTION: Mixed powder of a lithium compound and a titanium oxide is heat-treated at the given temperature of 500-1000°C to prepare a lithium - titanium multiple oxide having the ideal composition of Li2TiO3. Said lithium - titanium multiple oxide is treated with acid to prepare a high performance lithium adsorbent represented by Li2-xHxTiO3 (the value of (x) is 0<x<2). Mineral acid solution such as hydrochloric acid, sulfuric acid, nitric acid or the like of pH1 or less is suitable for the acid solution used for eluation of lithium out of the multiple oxide. The high performance lithium adsorbent thus prepared recovers lithium selectively out of low-lithium solution such as sea water or the like containing other metallic ion.
IWASAKI TAKASHI
HAYASHI HIROMICHI
TORII KAZUO
