Thenoyltrifluoroacetone and Tributyl-phosphate have been used for extraction of UO22+ into Ionic Liquid 1-Butyl-3-methylimidazoliumbis(trifluoromethylsulfonyl)imide. Increasing acidity of uranyl solution from 0.01 to 3 mol L-1 HNO3 for TTA in IL, the distribution ratio (D-U) and extraction efficiency (%E) both decreased. Further increment in acidity shows reversal of trend. Similar behavior is observed for TBP. With increasing concentration of TTA, %E increases stabilizing at 0.5 mol L-1 TTA. Adding methanol to TTA increased the D-U due to active enolic formation. The developed kinetic model estimates the overall mass transfer coefficient (Ka) as 3.6 x 10(-2) s(-1). Synergistic effect has been observed for combination of TTA + TBP resulting in enhanced D-U.