Guo Fan, Xi Xiaoli, Ma Liwen, Nie Zuoren
Collaborative Innovation Center of Capital Resource-Recycling Material Technology, Beijing University of Technology, Beijing 100124, China.
Key Laboratory of Advanced Functional Materials, Ministry of Education, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, China.
ACS Omega. 2022 May 24;7(22):18229-18237. doi: 10.1021/acsomega.1c06257. eCollection 2022 Jun 7.
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 MoS have been significantly improved. Among them, D301@TA showed the highest sorption capacity of 414 mg·g 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 MoS ions were subjected to ion exchange. This work provides a green and efficient approach for separating tungsten and molybdenum.
钨（W）和钼（Mo）是重要的战略资源，但二者在原生矿石和废料中均共存。在获得单一金属产品之前，通常需要将二者分离。在本工作中，我们报道了两种新型多胺树脂（D301@PA和D301@TA），它们可通过浸渍法，由组装胺（伯胺或叔胺）与传统D301树脂制得。然后，开展了胺树脂的吸附实验，两种新型多胺树脂对MoS的选择性和吸附容量均得到显著提高。其中，D301@TA表现出最高吸附容量414 mg·g和分离因子108。最后，可通过扫描电子显微镜（SEM）、布鲁诺尔-埃米特-特勒（BET）分析和X射线光电子能谱（XPS）推断吸附机理；胺树脂中的Cl离子与MoS离子发生了离子交换。本工作为钨钼分离提供了一种绿色高效的方法。
