Flotation Behavior and Adsorption Mechanism of Phenylpropyl Hydroxamic Acid As Collector Agent in Separation of Fluorite from Calcite

Xinyang Yu; Linghan Mao; Honghui Xie; Xiang Yao; Guichun He; Zhiqiang Huang

doi:10.1021/acs.langmuir.3c00584

Flotation Behavior and Adsorption Mechanism of Phenylpropyl Hydroxamic Acid As Collector Agent in Separation of Fluorite from Calcite

Langmuir. 2023 Apr 25;39(16):5936-5943. doi: 10.1021/acs.langmuir.3c00584. Epub 2023 Apr 16.

Authors

Xinyang Yu^{1

2}, Linghan Mao^{1

2}, Honghui Xie^{1

2}, Xiang Yao^{1

2}, Guichun He^{1

2}, Zhiqiang Huang^{1

2}

Affiliations

¹ Jiangxi Provincial Key Laboratory of Mining Engineering, Ganzhou, Jiangxi 341000, China.
² School of Resource and Environment Engineering, Jiangxi University of Science and Technology, Ganzhou, Jiangxi 341000, China.

PMID: 37062889
DOI: 10.1021/acs.langmuir.3c00584

Abstract

The hydroxylamine method involves the synthesis of a new hydroxamic acid collector, i.e., phenylpropyl hydroxamic acid (PHA), from methyl cinnamic hydroxamic acid. Flotation test results show that PHA exhibits good selective collection ability. The adsorption mechanism of PHA is investigated using the zeta potential, Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). The results show that PHA formed a new Ca-O bond with Ca²⁺ on the fluorite surface via chemical adsorption. A new five-element chelated hydroxamate group may have formed in Ca on the fluorite surface. The PHA selectivity is fully explained via density functional theory (DFT) calculations, and an adsorption model is established.