4-甲基苯并-15-冠-5分离锂同位素的能力

SEPARATIVE ABILITY OF 4-METHYLBENZO-15 -CROWN-5 TO LITHIUM ISOTOPES

摘要: 本文测定了用4-甲基苯并-15-冠-5(MB15C5)的碘苯溶液萃取硫氰酸锂时锂的同位素分离能力。15~0C时它的ε_p为2.6×10~(-2)。确定了MB15C5与4-叔丁基苯并-15-冠-5(CR)具有相同的锂同位素分离能力。经考察,在碘苯中MB15C5的溶解度比CR的溶解度大得多。这为用高浓MB15C5进行萃取提供了可能。还讨论了调节高浓多醚体系的萃取率和分离系数的途径。

Abstract: In this paper, the lithium isotope separation ability in extraction process of LiSCN with C6H5I solution containing 4-methylbenzo-15-crown-5(MBl5C5) has been determined to be 2.6×10-2 at 15?℃, which is the same as determined using 4-tert-butylbenzo-15-crown-5 (CR) .The solubility of MB15C5 in C6H6I has been examined to be higher than that of CR. This advantage of MB15C5 provides the possibility to go on with the extraction in high concentration systems. An approach for regulating distribution coefficients and separation factors in these systems is discussed.