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Flotation enhancement of spodumene with a β-amino-hydroxamate surfactants
Applied Surface Science ( IF 6.3 ) Pub Date : 2024-12-19 , DOI: 10.1016/j.apsusc.2024.162166 Jing Qi, Jichang Tu, Xian Xie, Hongling Wang, Ruiqi Xie
Applied Surface Science ( IF 6.3 ) Pub Date : 2024-12-19 , DOI: 10.1016/j.apsusc.2024.162166 Jing Qi, Jichang Tu, Xian Xie, Hongling Wang, Ruiqi Xie
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In view of the combination of dodecylamine and hydroxamate can improve the flotation recovery of spodumene, a novel β-amino-hydroxamate surfactant, i.e., N-(3-(dodecylamino)) hydroxamic acid (DAHA), was designed and introduced into spodumene flotation. The micro-flotation performance indicated that DAHA performed excellent collecting ability toward spodumene, and 2.0 × 10-4 mol/L of DAHA floated out about 90.2 % of spodumene, while that of sodium oleate (NaOL) was only about 57.4 %. The zeta potential of DAHA-treated spodumene revealed the effective chemisorption of hydroxamate group on spodumene surface. FTIR and XPS recommended that the hydroxamate group in DAHA chelated with surface Al sites to form five-membered hydroxamate-(O,O)-Al complexes. The affinity of DAHA on spodumene spontaneously enhanced by the protonated amino group (–NH3+), which facilitated the chelation of hydroxamate with the surface Al atoms and strengthened the hydrophobicity of spodumene.
更新日期：2024-12-20
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