Flotation performance and adsorption mechanism of 5-hydroxyoctan-4-one oxime to malachite

被引:2
|
作者
Li, Fang-xu [1 ,2 ,3 ]
Lin, Ri-xiao [1 ,2 ,3 ]
Zhao, Gang [4 ]
机构
[1] Guangdong Acad Sci, Inst Resources Utilizat & Rare Earth Dev, Guangzhou 510650, Peoples R China
[2] State Key Lab Rare Met Separat & Comprehens Utiliz, Guangzhou 510650, Peoples R China
[3] Guangdong Prov Key Lab Dev & Comprehens Utilizat M, Guangzhou 510650, Peoples R China
[4] Cent South Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China
关键词
flotation; adsorption; oxime collector; copper oxide ore; malachite; COPPER-OXIDE; ACID; COLLECTOR; SEPARATION; DESIGN; IONS; ORE;
D O I
10.1016/S1003-6326(23)66373-3
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
In order to improve the utilization efficiency of copper oxide mineral resources, a novel collector, 5-hydroxyoctan-4-one oxime (HOO), was synthesized from a commodity chemical butyraldehyde and hydroxylamine hydrochloride. Its flotation performance and adsorption mechanism to malachite were investigated by flotation tests, Fourier transform infrared spectrum (FTIR), X-ray photoelectron spectroscopy (XPS) analysis and density functional theory (DFT) calculation. Flotation results of malachite showed that HOO exhibited better collecting ability and less dosage compared to benzohydroxamic acid (BHA). FTIR and XPS data gave clear evidence for the formation of Cu-oxime complex (five-membered and six-membered ring chelates) on malachite surfaces after HOO adsorption through the linkage among C-OH, C=NOH and Cu species. Moreover, DFT results showed that HOO coordinated with Cu atoms preferably through the oxime and hydroxyl groups to form bidentate chelates.
引用
收藏
页码:3825 / 3834
页数:10
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