الفهرس 
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Abstract
The obtained chemical analysis for Roscua monazitc, the aim of this work is the separation of uranium, thorium and rare earth elements
Irorn Rosetta mouazitc The proposed alkaline chemical treatment of the obtained monazitc
concentrates has indicated that the separation of thorium uranium and rare
earth metals in pure products can be successfully achieved by alkaline
treatment. The percent recovery of Th and U attains to 85, 90<% wt
respectively while the percent of recovery for REEs was about 95% wt
pure RI ’:Es. from the ThiLJ cake we can conclude that:
For alkali carbonate leaching or Th/U cake. the optimum condition IS
20 % sodium carbonate, (1 15) S/L ratio at 80 DC for separation Th and
U Irorn its leach liquor.
2- On the addition of H202 can precipitate Th as thorium oxide,
then acidification the filtrate to precipitate U. from the REEs cake we can conclude that:
1- Separation ofCc from RI’: cake. In addition, Cc was individually
separatedvia its oxidation into Cc (JV) with recovery exceeding 95 <%
and with high purity.
2- ••. The other RJ]~s were individually separated using l)o\\l(’’(50W
/’8 through their corresponding 1-:1),1/\ complexes.