Novel Styrene-Based Polyamine Sorbent for Efficient Selective Separation of Molybdenum

Fan Guo; Xiaoli Xi; Liwen Ma; Zuoren Nie

doi:10.1021/acsomega.1c06257

Novel Styrene-Based Polyamine Sorbent for Efficient Selective Separation of Molybdenum

ACS Omega. 2022 May 24;7(22):18229-18237. doi: 10.1021/acsomega.1c06257. eCollection 2022 Jun 7.

Authors

Fan Guo¹, Xiaoli Xi^{1

2}, Liwen Ma^{1

3}, Zuoren Nie^{1

2

3}

Affiliations

¹ Collaborative Innovation Center of Capital Resource-Recycling Material Technology, Beijing University of Technology, Beijing 100124, China.
² Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
³ National Engineering Laboratory for Industrial Big-Data Application Technology, Beijing University of Technology, Beijing 100124, China.

Abstract

Tungsten (W) and molybdenum (Mo) are important strategic resources but the two coexist in both primary ore and waste. Before a single metal product is obtained, it is often necessary to separate the two. In this work, we reported two new polyamine resins (D301@PA and D301@TA), which can be obtained by an assembled amine (primary amine or tertiary amine) and traditional D301 resin by the dipping method. Then, the sorption experiments with the amine resins were carried out, and the selectivity and sorption capacity of the two new polyamine resins for MoS₄ ^2- have been significantly improved. Among them, D301@TA showed the highest sorption capacity of 414 mg·g^-1 and a separation factor of 108. Finally, the sorption mechanism can be inferred through scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, and X-ray photoemission spectroscopy (XPS); the Cl^- ions in the amine resin and the MoS₄ ^2- ions were subjected to ion exchange. This work provides a green and efficient approach for separating tungsten and molybdenum.