RECOVERY OF SOME RARE EARTH ELEMENTS DURING SEPARATION OF YTTRIUM FROM EGYPTION CRUDE MONAZITE USING SOLVENT IMPREGNATED RESIN (SIR) TECHNIQUE

Abstract

Over the last few decades, the need for highly purified rare earth oxides has increased as applications expanded and diversified. Yttrium is an extremely important rare earth element and it is important to have a supply of it for future generations. This research focus on the separation of yttrium using direct precipitation and the impregnated resins as to produce purified rare earth oxides. In this work a systematic study on the separation of yttrium from rare earths concentrate derived from Egyptian black sand monazite was made. it is explored the ability of the carbonate for the precipitation of the REEs and an easy separation of yttrium was achieved using sodium carbonate to form complex yttrium carbonate followed by oxalic acid precipitation. The precipitation using sodium carbonate sodium carbonate only or sodium carbonate and hydrogen peroxide was more sufficient than oxalic acid. The obtained precipitates from sodium carbonate only or sodium carbonate and hydrogen peroxide contain 27.56 and 29.73% yttrium respectively from the first precipitation of effluent solution after uranium