Premium
Sur la séparation des terres rares à l'aide de l'acide éthylènediamine‐tétraacétique. IX. Procédé en cycle pour le fractionnement des terres yttriques
Author(s) -
Brunisholz G.,
Randin M.
Publication year - 1959
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19590420622
Subject(s) - chemistry , yttrium , lanthanide , yield (engineering) , medicinal chemistry , fractionation , cerium , nuclear chemistry , inorganic chemistry , chromatography , organic chemistry , physics , ion , thermodynamics , oxide
A cyclic process for the fractionation of the yttrium earths is described. The existence of a miscibility gap between the salts NH 4 [R'‐EDTA], 8 H 2 O and NH 4 [R″‐EDTA] − , 6 H 2 O (R′ = elements of the cerium group plus Gd and Tb; R″ = elements Dy to Lu, including Y; EDT.4 = ethylendiamine‐tetraacetate) provides an excellent separation. The method is suitable for collecting in a small fraction and with a high yield the traces of the heavy lanthanides present in a mixture containing about 80% (Sin + Gd).