Adsorption Mechanism of Heavy Rare Earth by Cyanex272 Impregnated Resin
Cyanex272浸渍树脂吸萃重稀土机理

Through the methods of saturation, equivalent molarity and slope, the experimental results showed that the extraction ratio for Cyanex272 resin approached 3 and chlorine ions did not take part in the coordination reaction. The results by infrared spectroscopy also showed that Cyanex272 was single-polymer in extraction chromatography by which the amount of extractant was less than double-polymer in solvent extraction. The extracted compound was determined as REA_3. The adsorption-extraction mechanism by Cyanex272 could be expressed as RE~(3+)_((a))+3HA_((r))=REA_(3(r))+3H~+_((a)).