Beiträge zur Trennung der Seltenen Erden. IV. Weitere Untersuchungen über die Trennung Seltener Erden durch Komplexelution vom Kationenaustauscher mittels β‐Oxyäthyliminodiessigsäure

Abstract

IiihaltsiibersichtMittels einer 2,Oproz. Losung von e-Oxyat,hylirninocIicssigsaure als Elutionsniittel werden bei pH-Werten von 7-8 lanthanreiche 'Coritcrdengemische getrennt. Die 42 t: I 2 3 4 5 6 7 8 9 I0 4 l 12 Gm das Ausfallen freier Saure in der 2. Saule zu verhindern, wurde deshalh versuchsweise die Elution eines Didymgemisches mit nur 1,5proz. 2-HIMDA-Losung p H = 8,0 durchgefuhrt. Abb. 2 zeigt den Elutionsverlauf von Versuch 5. J. prskt. Chem. 4. Reihe, Bd. 5 .2a.

Nickel(II) complexes with 2-hydroxyethyliminodioacetic acid in aqueous solutions of dicarboxylic acids

“…2 Hydroxyethyliminodiacetic acid, which forms com plexes with many metals, is used as an effective com plexing agent. The ability of this compound to form metal ion complexes of various composition, charge, and stability and its high water solubility served as pre requisites for the use of this chelating agent as an effec tive eluent in the separation of lanthanides [1][2][3][4].Dicarboxylic acids are used in various fields of industry including the production of varnishes and paints, synthetic fibers, and food products, while dicarboxylic acid amides (dipeptides) coordinated to micronutrient metals are known as biologically active medicinal agents [5].Nickel is also a biologically active metal. The excessive "technology induced" nickel(II) com pounds that get into the body are toxic for the metab olism and carcinogenic for cells [6].…”

“…2 Hydroxyethyliminodiacetic acid, which forms com plexes with many metals, is used as an effective com plexing agent. The ability of this compound to form metal ion complexes of various composition, charge, and stability and its high water solubility served as pre requisites for the use of this chelating agent as an effec tive eluent in the separation of lanthanides [1][2][3][4].…”