Utilization of a novel bisphosphonic acid surfactant for reverse froth flotation of magnesite and dolomite

Sun, Wenhan; Wang, Xinyang; Liu, Wenbao; Li, Pengcheng; Shen, Yanbai; Dai, Shujuan

doi:10.1016/j.mineng.2022.107668

Cited by 17 publications

(6 citation statements)

References 40 publications

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“…In this paper, the chemical properties of TPA + were analyzed at the atomic level using DFT to provide further insight into the interaction mechanism of the collector. − A commonly used visual method to observe the electron distribution of molecules is the MEP . The HOMO and LUMO geometries of the analyzed TPA molecule after optimization and the MEP maps are shown in Figure .…”

Section: Resultsmentioning

confidence: 99%

Novel 3-Tetradecylamine Propyl Amidoxime Collector for Selective Adsorption on the Surface of Smithsonite for Flotation Separation of Smithsonite from Calcite

Ouyang,

Huang,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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Smithsonite has similar physicochemical properties and floatability to calcite, which makes it difficult to achieve flotation separation of smithsonite from calcite with conventional collectors. In this article, a novel 3-tetradecylamine propyl amidoxime (TPA) collector was prepared for the flotation of smithsonite. The microflotation experiments showed that the recovery of smithsonite could reach 93.5% at a dosage of 4.0 × 10–4 mol/L of TPA under neutral conditions, while the recovery of calcite was only 20.5%, which demonstrated excellent collection ability and selectivity. The adsorption mechanism of TPA with smithsonite was investigated by further experiments. The contact angle test indicated that TPA could increase the contact angle of smithsonite from 34.1 to 119.9°, significantly enhancing its surface hydrophobicity. It was concluded from the zeta potential test that the TPA adsorbed on smithsonite could increase its positive potential but had no significant effect on calcite. Density functional theory calculations revealed that the TPA has very low HOMO and LUMO values, thus the adsorption of the –C(NOH)N+H3 group on the surface of smithsonite surface is formed by electrostatic interaction, while Fourier transform infrared spectroscopy showed that the adsorption is selective for smithsonite. Therefore, this work is expected to provide an efficient collector for the purification of smithsonite ore and shows great potential for environmental protection and mineral resource recycling.

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Section: Resultsmentioning

confidence: 99%

Novel 3-Tetradecylamine Propyl Amidoxime Collector for Selective Adsorption on the Surface of Smithsonite for Flotation Separation of Smithsonite from Calcite

Ouyang,

Huang,

Wang

et al. 2023

Ind. Eng. Chem. Res.

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“…DFT calculations are a functional and reliable tool to optimize and calculate the structure of the collector molecule and predict the interaction between the collector and mineral. , The optimized geometric structures and maps of HOMO and LUMO and MEP maps of the DPA and DA are illustrated in Figure . The calculated net atomic charges of two collectors are illustrated in Table . …”

Section: Resultsmentioning

confidence: 99%

“…Zeta potential can reflect the adsorption of collector on mineral surface and the interaction between the collector and mineral in flotation. 47,50 Zeta potential of lepidolite and the interaction between lepidolite and DA and DPA is shown in Figure 8b. It could be seen that the isoelectric point of lepidolite occurs around pH = 3, which was consistent with the relevant report.…”

Section: ■ Introductionmentioning

confidence: 99%

Adsorption Mechanism of Amidoxime Collector on the Flotation of Lepidolite: Experiment and DFT Calculation

Huang

et al. 2022

Langmuir

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Lepidolite is an important mineral resource of lithium. With the increase in awareness of low-carbon and green travel, the demand for lithium has increased dramatically. Therefore, how to increase the output of lithium has to turn into high precedence. In this paper, amidoxime (DPA) was synthesized and used for the efficient collection of lepidolite. Dodecylamine (DA), a commonly used collector of lepidolite ore, was used for comparison. The collecting performances of DA and DPA for lepidolite were studied by the micro-flotation experiment, and the adsorption mechanism of DPA on lepidolite was verified by contact angle, zeta potential tests, FTIR spectra, and density functional theory (DFT) calculations. The results of flotation experiments showed that at the same collector dosage (3 × 10–4 mol/L), the recovery of lepidolite could reach 90%, while the recovery of lepidolite with DA was only 52.5%, and to achieve the maximum recovery of DA (77.5%), only half of the DPA was added. The contact angle test results showed that DPA could effectively improve the hydrophobicity of lepidolite than DA. FTIR spectra and zeta potential tests suggested that DPA molecules were adsorbed on the lepidolite surface by electrostatic attraction. DFT calculations revealed that DPA reacted with the nucleophilic reagent (lepidolite) by the reactive site of the −CH2NH(CH2)2C(NOH)N+H3 group and more easily absorbed on the surface of lepidolite than DA. Therefore, our new finding will provide an important prospect for the sustainable development and utilization of lithium resources.

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“…Such an understanding is pivotal for comprehensively elucidating the flotation behaviors of these minerals under diverse conditions, deciphering the interactions between flotation chemicals and minerals, and advancing the efficacy of MT flotation separation. 16 This research focuses on the investigation of quartz, magnesite, dolomite, and calcite, utilizing the Materials Studio software based on density-functional theory to simulate the properties of mineral crystal structure, calculated energy bands, Mulliken population, electric charge density, density of states, and common cleavage surfaces. The outcomes of this research are of paramount significance as they contribute to a comprehensive understanding of the distinctions in the flotation properties among these four minerals from a fundamental perspective.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, achieving a systematic comprehension of the surface properties and surface electronic structures of quartz, magnesite, dolomite, and calcite at the atomic level holds substantial significance. Such an understanding is pivotal for comprehensively elucidating the flotation behaviors of these minerals under diverse conditions, deciphering the interactions between flotation chemicals and minerals, and advancing the efficacy of MT flotation separation 16 …”

Section: Introductionmentioning

confidence: 99%

First‐principles study on the surface properties and floatability of magnesite tailings and its main gangue

Xue,

Feng,

et al. 2024

Asia-Pacific J Chem Eng

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The accumulation of magnesite tailings (MT) poses challenges such as resource wastage, land occupation, dust generation, and environmental pollution, thereby jeopardizing both physical and mental health. Urgent attention is required for the proper treatment of this solid waste material. An in‐depth investigation into enhancing the flotation processes of MT is essential. A comprehensive comprehension of the surface properties of MT and its principal gangue minerals assumes paramount importance in facilitating the desilication and decalcification of MT via flotation. In this investigation, a first‐principles study grounded in density functional theory was employed to scrutinize the surface properties, as well as the similarities and differences in flotability, of four minerals‐quartz, magnesite, dolomite, and calcite. The findings reveal that quartz's primary cleavage plane is (1 0 1), whereas that of magnesite, dolomite, and calcite is (1 0 4). The surfaces of magnesite, dolomite, and calcite exhibit chemical similarities, with Ca atoms demonstrating higher reactivity than Mg atoms. The hydrogen bonding between dodecylamine and quartz emerges as the most robust, while adsorption energies with the three carbonate minerals exhibit minimal disparity. The ongoing focus lies on the selection and optimization tests of decalcification reagents. A moderate quantity of dodecylamine manifests a certain desilication effect. However, excessive dosage compromises selectivity. The first‐principles approach offers guiding significance for elucidating the surface properties of MT and its primary vein minerals, along with investigating the adsorption mechanisms of flotation regents.

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Utilization of a novel bisphosphonic acid surfactant for reverse froth flotation of magnesite and dolomite

Cited by 17 publications

References 40 publications

Novel 3-Tetradecylamine Propyl Amidoxime Collector for Selective Adsorption on the Surface of Smithsonite for Flotation Separation of Smithsonite from Calcite

Novel 3-Tetradecylamine Propyl Amidoxime Collector for Selective Adsorption on the Surface of Smithsonite for Flotation Separation of Smithsonite from Calcite

Adsorption Mechanism of Amidoxime Collector on the Flotation of Lepidolite: Experiment and DFT Calculation

First‐principles study on the surface properties and floatability of magnesite tailings and its main gangue

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