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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 7, Number 4
August 20, 1963 

Nonmonotonic Ordering of Lanthanon Nitrates in the Phosphine Oxide Extraction Systems

희토류원소의 용매추출의 불균일성
C. T. Rhee

TBPO-toluene 및 TOPO-toluene 계에 대한 4f 희토류원소의 초산염의 용매논도, 초산기농도 및 원자번호(Z)의 변화에 따르는 분배률의 변화를 방사화학적으로 특정하였다. log Kd 대 Z의 관계는 Z=63∼64에서 교차되는 두개의 직선으로 표시되면 용매농도 존재도는 희토류원소 전반에 걸쳐 일정하나 초산기농도 의존도는 경희토류원소와 중희토류원소가 다르게 나타난다.

The distribution ratio of lanthanon nitrates in the TBPO-and TOPO-toluene systems were studied radiometrically as a function of solvent, nitrate and atomic number(Z). The plots of log Kd vs. Z shows two straight lines which are crossing at Z = 63∼64. The solvent dependency was same for lighter and heavier lanthanons but nitrate dependency was different between the two parts.

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