Selective separation and purification of ReO4-by temperature-sensitive imprinted polymer with porous interconnected network structure

In this study, an intelligent block temperature-sensitive PDEA-b-P (DEA -co-AM) was prepared by RAFT poly-merization first. Subsequently, it was introduced into the preparation process of ReO4--TPIP to investigate its effect on selective separation performance. ReO4--TPIP was prepared by Pickering-like HIPE polymerization, which could form a porous interoperable network structure and further accelerate the mass transfer rate of ReO4- significantly. The structure and morphology of ReO4--TPIP were characterized by FTIR, SEM-EDS, BET, and ICP-AES. Results documented that ReO4--TPIP could reach adsorption equilibrium at 31 degrees C after 120 min, the maximum adsorption capacity (Q) was 0.16 mmol/g, and the desorption efficiency (D) arrived at 82.21%, with 3.26 of selective adsorption coefficients in equal molar concentration solution of ReO4- and MnO4-. After 11 repeated adsorption-desorption recycles, the adsorption capacity and desorption efficiency remained at 79.10% and 71.01% of their initial value, respectively. More surprisingly, the purity of Re in solution rose from 35.41% to 62.82% after 1 adsorption-desorption recycle of ReO4--TPIP in the secondary leaching solution of high -temperature alloys. This demonstrates the promising development of this material for the industrial separa-tion and purification of Re.