中文摘要：

开展了低浓度氢氟酸体系中MIBK萃取分离钽铌的研究，考察了萃取时间、萃取相比、氢氟酸浓度、钽铌浓度、钽与铌质量比对萃取分离过程的影响。结果表明，在始氢氟酸浓度0．5mol／L、钽铌总浓度60g／L、萃取相比（O／A）为5、钽与铌质量比2的条件下萃取5min可获得最佳的钽铌分离效果，钽铌分离系数高达50000。

英文摘要：

The extraction separation of tantalum and niobium with MIBK from low hydrofluoric acid con-centration system was studied. The O/A ratio, hydrofluoric acid concentration, tantalum and niobium concen tration and tantalum-niobium mass ratio on the effect of separation of tantalum and niobium were investigated. The results show that the separation factor of tantalum and niobium is 50 000 under the optimal extraction conditions including extraction time of 5 min, O/A ratio of 5, hydrofluoric acid concentration of 0.5 mol/L, tantalum and nio-bium total concentration of 60 g/L, and tantalum-niobium mass ratio of 2.