液膜对不同酸度磷矿浸出液中稀土的提取

用浓盐酸溶解富含镧、铈等稀土离子的织金磷矿，得到含稀土离子的磷矿浸出液，以P204为载体、Span80或T154作表面活性剂、磺化煤油作溶剂、盐酸作内水相解析剂制成的乳状液膜对酸解液中镧、铈等稀土离子进行提取，考察了流动载体浓度、表面活性剂种类及浓度对稀土提取率的影响及磷矿浸出液中不同浓度稀土离子在不同酸度下的分离提取情况. 结果表明，液膜中最佳载体浓度为12%(j)，最佳表面活性剂浓度为4%(j)，随外水相pH值增大，液膜对稀土离子的提取率提高，外水相稀土离子浓度为100 mg/L，pH=1时，其提取率可达79.93%.

Extraction of Rare Earth Ions by Emulsion Liquid Membrane from Acidic Leaching Solution of Phosphorus-containing Ore

Lanthanum and cerium ions riched phosphate ore in Zhijin was dissolved by hydrochloric acid, then extracted by emulsion liquid membrane. This liquid membrane system contained di(2-ethylhexyl)-phosphate as carrier, sorbitol anhydride or polyisobutylene succinimide as surfactant, sulfonated kerosene as solvent and hydrochloric acid as strippant. The effects of carrier and surfactant to emulsion on recovery of rare earth ions were studied. Separation and extraction of rare earth ions under different pH values were also examined. The results showed that the optimum concentrations of carrier and surfactant were 12%(j) and 4%(j) respectively, with the increase of pH value in external aqueous phase, the extraction rate of rare earth ions with emulsion liquid membrane increased. When the concentration of rare earth ions was 100 mg/L, and pH=1 in external aqueous phase, their extraction rate was up to 79.93%.