摘要
1-苯基-3-甲基-4-三氟乙酰基吡唑酮-5(PMTFP)与磷酸三丁酯(TBP)或三正辛基氧化膦(TOPO)对三价稀土的协同萃取已有报道。本文研究了1-苯基-3-甲基-4-二氯乙酰基吡唑酮-5(PMDCP)和TOPO的氯仿溶液从硝酸介质中对La^(3+)、Nd^(3+)、Dy^(3+)和Yb^(3+)的协同萃取。 试验时将有机相与含硝酸稀土的水溶液共置于分液漏斗中,在一定温度下萃取30分钟。
The extraction of lanthanide ion?(La^(3+), Nd^(3+), Dy^(3+), Yb^(3+)) from nit?ie acid solutionwith mixturc of 1-thenyl-3-methyl-4-dichloroacetyl-pyrazolone-5(PMDCP) and tri-n-(octy-lphosphine oxide (TOPO) hae been studied. The synergic extraction coefficent of lanthanum27.3. The composition of extracted compound of lanthanum was shown to bea(PMDCP)_3.(TOPO)_2. The pH values of half an, extraction rate at 25℃of La^(3+), Nd^(3+), Dy^(3+) and Yb^(3+)are2 .11, 1.77, 1.60 and 1.50 respectively. The extraction equilibrium constants, enthalpy cha-nge and entropy change of the reaction at 25℃ have also been calculated.
出处
《应用化学》
CAS
CSCD
北大核心
1989年第4期75-77,共3页
Chinese Journal of Applied Chemistry
关键词
稀土
协同萃取
吡唑酮
TOPO
Synergic extraction
Lanthanum
Neodyniun
Dysprosium
Ytterbium
Pyrazolone
Tri-n-octylphosphine oxide
