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α-Amino Phosphonic Acid as the Oxidized Ore Collector: Flexible Intra-Molecular Proton Transfer Providing an Improved Flotation Efficiency
| Content Provider | MDPI |
|---|---|
| Author | Chen, Pan Wang, Jinggang Sun, Yameng Cheng, Shaoyi Gao, Huanzhi Wang, Hong Bin Cao, Jian |
| Copyright Year | 2022 |
| Description | The efficient separation of ilmenite is a difficult problem in minerals flotation. For this issue, α-aminooctyl phosphinic acid (APA) was developed as a selective collector to separate ilmenite. The flotation test result showed that APA was more efficient for improving ilmenite recovery compared with octylphosphonic acid (OPA). Adsorption, ZETA and FTIR measurements proved that the chemical interaction between collector APA and the surface of ilmenite was stronger than OPA, while the result is completely opposite in the case of titanaugite. Moreover, XPS test and DFT calculations indicated that the collector APA was coordinated with the surface of ilmenite through P-O-Fe and P-O-Ti bonding. The amine group in the α-site of the phosphonyl group facilitated APA to be a stable zwitterion in the solution, which greatly enhanced the nucleophilicity of the phosphonic acid group. On the other hand, more appropriate coordination energy was another reason for the superior collecting selectivity of APA than OPA. |
| Starting Page | 918 |
| e-ISSN | 2075163X |
| DOI | 10.3390/min12080918 |
| Journal | Minerals |
| Issue Number | 8 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-22 |
| Access Restriction | Open |
| Subject Keyword | Minerals Mining and Mineral Processing Α-aminooctyl Phosphinic Acid Flotation Ilmenite Adsorption |
| Content Type | Text |
| Resource Type | Article |
