Abstract: The content of Sc and Zr is 48.18 mg/L and 138.00 mg /L respectively in sulfuric acid leaching solution(sulfuric acid concentration 1.8 mol/L) of some wolframine slag from Hunan.To eliminate the effect of Zr on Sc extraction,zirconium pre removal experiment using N235 and TBP as composite extracting agent was conducted before scandium extraction.Results show that：①Under the condition of volume ratio of N235，TBP and sulfonated kerosene is 15∶15∶70 in the composite extracting agent，ratio of organic phase to water phase 1.5∶1，extraction time 5 min，extraction temperature 25 ℃，extraction oscillation frequency 120 r/min，single stage extraction was conducted and extraction rates of Zr and Sc were 92.03% and 0.96% respectively.Under the condition of sulfuric acid solution concentration 5 mol/L，the ratio of organic phase to water phase of extraction 3∶1，reverse extraction time 30 min，reverse extraction temperature 25 ℃，oscillation frequency 180 r/min，three-levels reverse extraction was conducted and extraction rates of Zr and Sc were 99.23% and 98.22% respectively.Therefore，the process can efficiently separate zirconium and scandium.②Extraction rate of Zr can reach to 91.97% by regenerative extractant whose effect is close to the new extractant，which illustrates regenerative extractant can be recycled.

Key words: Sc, Zr, N235, TBP, Extraction, Reextraction