3‐(2‐(2‐<scp>O</scp>xo‐2<scp><i>H</i></scp>‐chromene‐3‐carbonyl)hydrazono)‐<i>N</i>‐(pyridin‐2‐yl)butanamide Complexes: Synthesis, Characterization, <scp>DFT</scp>, Biological, and Ion‐flotation studies

Zaky, Rania; El-Reash, Y.G. Abou; Fekri, Ahmed; Youssef, Hany M.; Noori, Abdulrahman S.

doi:10.1002/jhet.2990

Cited by 3 publications

(4 citation statements)

References 41 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%

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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%

“…42−44 A commonly used visual method to observe the electron distribution of molecules is the MEP. 45 The HOMO and LUMO geometries of the analyzed TPA molecule after optimization and the MEP maps are shown in Figure 12. The net atomic charge results obtained after the calculation are arranged in Table 1.…”

Section: Contact Angle Testsmentioning

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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“…The MEP maps of DPA + and DA + are illustrated in Figure c. MEP is an intuitive method of looking at the electron distribution of a molecule . The blue color of map represents the negatively electrostatic potential, which is a favor site for electrophilic attack, and the red color of map represents the positive electrostatic potential, which is a favor site for nucleophilic attack.…”

Section: Resultsmentioning

confidence: 99%

“…MEP is an intuitive method of looking at the electron distribution of a molecule. 52 The blue color of map represents the negatively electrostatic potential, which is a favor site for electrophilic attack, and the red color of map represents the positive electrostatic potential, which is a favor site for nucleophilic attack. It is demonstrated that two deeper blue regions of DPA than DA were located on the −CH 2 NH-(CH 2 ) 2 C(NOH)N + H 3 group.…”

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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Adsorption study of 3- tetradecylamine propyl amidoxime onto rhodochrosite surface: Implications for rhodochrosite-calcite flotation separation

Ouyang,

Huang,

Wang

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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3‐(2‐(2‐Oxo‐2H‐chromene‐3‐carbonyl)hydrazono)‐N‐(pyridin‐2‐yl)butanamide Complexes: Synthesis, Characterization, DFT, Biological, and Ion‐flotation studies

Cited by 3 publications

References 41 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

Adsorption study of 3- tetradecylamine propyl amidoxime onto rhodochrosite surface: Implications for rhodochrosite-calcite flotation separation

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