Abstract
The chromatographic behaviour of rare earths from La to Gd has been investigated in HNO 3-methanol systems on the anion-exchange paper DE-20. The possibility of separation of two or more rare earths from each other has been shown as a consequence of the favourable effect of high methanol concentrations on selectivity. A comparison was also made with results obtained by elution under the same conditions on pure cellulose CLR/1 paper. This paper possessed only limited adsorption properties and did not show any selectivity toward different rare earths. The fact that in the liquid-liquid extraction system with the liquid anion exchanger tri- n-octylamine no rare earth adsorption occurs into the organic phase suggests that the adsorption and selectivity shown by the anion-exchange paper is not attributable to a pure anion-exchange process.
Published Version
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