期刊
APPLIED SURFACE SCIENCE
卷 347, 期 -, 页码 79-87出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.03.138
关键词
Flotation; Diaspore; Aluminosilicate mineral; Hydroxamic acid; Amide
类别
资金
- National High-Tech Research and Development Program of China (863 Program) [2013AA064102]
- National Basic Research Program of China (973 program) [2014CB643403]
- National Natural Science Foundation of China [21206199]
- Scientific Research Project of Education Department of Hunan Province [14C1155]
In this paper, a novel surfactant, N-(6-(hydroxyamino)-6-oxohexyl)decanamide (NHOD) was synthesized and used as a collector for flotation separation of diaspore and aluminosilicate minerals. The adsorption mechanism of NHOD onto diaspore was also investigated by FTIR spectra, zeta potential measurement and XPS. The flotation results demonstrated that NHOD exhibited superior collecting power to diaspore and selectivity against kaolinite and illite and could effectively realize flotation recovery of diaspore from bauxite ores contained aluminosilicate minerals under neutral conditions. The results of XPS, FTIR spectra and zeta potential illustrated that at around pH 7.0, NHOD might chemisorb on diaspore surfaces through Al-O coordination bonds formed by binding its -C(=O)NHOH or -C(=O)NH- chelate groups with aluminum atoms on diaspore surfaces. NHOD's unique properties, such as characteristic bond patterns onto diaspore surfaces, two hydrophobic groups, and intermolecular hydrogen bonds between neighboring NHOD molecules coated on diaspore surfaces, rendered it to be a superior flotation collector for diaspore. (C) 2015 Published by Elsevier B.V.
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