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ABSTRACT A de-tert-butyl calix arene phosphate (DCAP) with a complete elimination of the upper edge and a complete substitution of the lower edge was synthesized by dealkylation and substitution reactions.… Click to show full abstract
ABSTRACT A de-tert-butyl calix arene phosphate (DCAP) with a complete elimination of the upper edge and a complete substitution of the lower edge was synthesized by dealkylation and substitution reactions. The chemical structure of DCAP was further characterized by FTIR, mass MS and 1 H NMR. The ability of DCAP to extract light rare earth ions was studied as a function of concentration, aqueous phase pH, phase ratio, and extraction time. The results showed that DCAP had a 4% higher extraction rate of Pr3+ compared to Nd3+ under the same conditions. Preliminary extraction mechanism was also investigated.
Journal Title: Separation Science and Technology
Year Published: 2020
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