Скандийдің жеңіл балқитын еріткіштегі ди-2-этилгексилфосфор қышқыл балқымасымен экстракциясы

Currently widespread distribution of extraction methods using fusible 

reagents can be explained by a number of advantages, such as high ki-

netic characteristics of the process, the ease separation of two phases, high 

selectivity of many extractants, relatively complete regeneration. For the 

extraction of scandium in technological order, neutral and cation exchange 

extractants can be used. Extraction of scandium by  melt mixtures of di-

2-ethylhexylphosphoric acid – higher carboxylic acid – paraffin and the 

effect of acidity of the aqueous phase, the concentration of scandium and 

the aqueous extractant in the organic phase, the volume ratio of organic 

and aqueous phases on the extraction of metal were studied. It was found 

that the extraction of scandium proceeds through the cation exchange 

mechanism. Scandium was extracted quantitatively (> 99.0%) from acid 

solutions. The optimal concentration of di-2-ethylhexylphosphoric acid in 

the extractant was 0,250 M, quantitative extraction of scandium was ob-

served in the range of its concentrations of 10

-3

–10

 M and the volume 

ratio of organicphases to aqueous phases of 1:5–1:20.

Key words:

 extraction; extractant; scandium; di-2-ethylhexylphos-

ethylhexylphos-

phoricacid; paraffin; higher carboxylic acid.

Исатаева А.Т., Исмаилова А.Г., 

Наурызбаев М.К.

Казахский национальный  

университет им. аль-Фараби,  

г. Алматы, Казахстан,