Structural modification of hydroxamic acid collectors to enhance the flotation performance of malachite and associated mechanism
| Autor: | Xin Ma, Hong Zhong, Shuai Wang, Yuxi Lu, Zhanfang Cao, Kangjing Wu |
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| Rok vydání: | 2021 |
| Předmět: |
Hydroxamic acid
Butyramide Malachite Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials chemistry.chemical_compound chemistry Chemisorption visual_art Amide Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry Fourier transform infrared spectroscopy Selectivity Spectroscopy Acetamide Nuclear chemistry |
| Zdroj: | Journal of Molecular Liquids. 344:117959 |
| ISSN: | 0167-7322 |
| Popis: | A series of N-hydroxy-N-aryl amide collectors, including N-hydroxy-N-benzyl acetamide (NHNBA), N-hydroxy-N-benzyl butyramide (NHNBB), N-hydroxy-N-phenyl acetamide (NHNPA) and N-hydroxy-N-phenyl butyramide (NHNPB), was designed in this study and employed for the first time in malachite flotation. Flotation tests conducted in the absence of frothers and activators revealed that the N-hydroxy-N-aryl amide collectors realized effective separation of malachite from calcite and quartz, which could not be readily achieved with benzohydroxamic acid (BHA). NHNBB exhibited optimal collection ability and selectivity for malachite over calcite and quartz. Quantum chemistry calculations, solution chemistry analysis and FTIR spectroscopy and XPS analyses revealed that in addition to electrostatic attraction, NHNBB possibly interacted with the malachite surface via chemisorption by forming five-membered-ring complexes, resulting in an efficient collection capacity for malachite. |
| Databáze: | OpenAIRE |
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