Collectability of physically adsorbed xanthate ion–dixanthogen associates

Кондратьев, С. А.; Burdakova, E. A.; Konovalov, I. A.

doi:10.1134/s1062739116030801

Cited by 6 publications

(4 citation statements)

References 9 publications

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“…This was further proof of the previous conjecture: it is likely that SEG depressed molybdenite by covering the dixanthogen resulting from adsorption of xanthate ions [25]. However, chalcopyrite still kept a good floatability in the experiments because of the low adsorption efficiency of SEG.…”

Section: Adsorption Studiessupporting

confidence: 61%

“…However, the adsorption experiment results showed that the adsorption of SEG on the surface of molybdenite basically did not prevent the adsorption of the collector AX. Therefore, combined with the two experimental results verified the conjecture in flotation discussion, it can be said that the seaweed glue depresses molybdenite by covering the dixanthogen absorbed [25] on the surface resulting from the adsorption of xanthate ions. Figure 9a gives the zeta-potential of chalcopyrite in the absence and presence of SEG and AX under different pH conditions.…”

Section: Zeta Potential Testsmentioning

confidence: 49%

“…The measurement was carried out at 25 • C. A 20 mg sample was placed in a 100 mL beaker with 40 mL aqueous solutions containing 10 mM KNO 3 as the supporting electrolyte, and the mineral suspension was conditioned with reagents over the pH range of 3-12 [25]. All of the samples were thoroughly equilibrated, and an average zeta potential value of at least three individual measurements was recorded.…”

Section: Zeta Potential Measurementsmentioning

confidence: 99%

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The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

Chen

et al. 2018

Minerals

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Flotation separation of chalcopyrite from molybdenite was studied using seaweed glue (SEG) as a depressant. Flotation process and mechanism were examined by response surface methodology, flotation tests, adsorption tests, zeta potential measurements and fourier transform infrared (FT-IR) spectra. Response surface methodology with a Box-Behnken design suggested the optimal reagent schedule: pH 4, depressant seaweed glue 197 mg/L, collector amyl xanthate 16 mg/L and frother (methyl isobutyl carbinol) 20 mg/L, and selective separation of chalcopyrite and molybdenite was achieved by flotation. Comparison of SEG and traditional depressants indicated that the SEG could achieve a similar separation efficiency, and exhibited the advantages of environmental compatibility and economic adaptability. Co-adsorption of seaweed glue and amyl xanthate occurred on the surface of molybdenite, and is explained to happen through distinct mechanisms due to the heterogeneous nature of the surface. It is likely that seaweed glue depresses molybdenite by covering the dixanthogen resulting from adsorption of xanthate ions. It is shown that seaweed glue is as effective a depressant of Cu/Mo separation as cyanide.

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Section: Adsorption Studiessupporting

confidence: 61%

Section: Zeta Potential Testsmentioning

confidence: 49%

Section: Zeta Potential Measurementsmentioning

confidence: 99%

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The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

Chen

et al. 2018

Minerals

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“…In the process of flotation of sulfide ores, sulfhydryl collecting reagents are gene rally used. These are different variations of xanthates (Kx), salts of xanthogenic acid [1] and aerofloats (Af), salts of dithiophosphoric acid [2,3]. However, these reagents, in particular xanthates, have a number of disadvantages: instability of aqueous solutions, formation of toxic products as a result of decomposition and relatively low selectivity of action [4].…”

mentioning

confidence: 99%

Search for new amide-class collecting agents and study of their flotation activity in the process of copper-nickel ore flotation

Bazarova,

Mitrofanova,

Chernousenko

2023

nfm

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The issue of expanding the range of effective flotation reagents remains relevant due to the deteriorating ore base and the involvement in processing of refractory ores with complex mineral composition. In recent years, complexing reagents capable of forming strong complexes with transition metal ions have been of increasing interest. At that, insertion of an additional functional group into the structure of the reagent molecule can provide a more complete extraction of the useful component. The purpose of this work is to evaluate the efficiency of using nitrogen-containing monoderivatives of dicarboxylic acids from the amide class as collecting agents for flotation of copper-nickel ores. The synthesis of monoalkylamides of succinic and phthalic acids with different hydrocarbon radicals as well as their complexes with copper and nickel was carried out. The formation of complexes was confirmed by extraction method, chemical analysis and Raman spectroscopy. It was noted that during the extraction of copper and nickel by the reagents under consideration, an effective process of complexation in the organic phase takes place. Their interaction with the surface of copper-and nickel-containing minerals was evaluated by the method of frothless flotation in comparison with the traditional collector. It is shown that monoalkylamides are more efficient towards nickel-containing minerals. Flotation tests on a sample of finely disseminated copper-nickel ore with copper content of 0.182% and nickel content of 0.479% have shown that succinic acid monoalkylamide as an independent collector with its own foaming properties and in a mixture with butyl xanthate shows greater selectivity. The best results were obtained when it was used in a mixture with butyl xanthate at a ratio of 70 : 30.

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Removal of ethyl, isobutyl, and isoamyl xanthates using cationic gemini surfactant-modified montmorillonites

Huang

Ren

et al. 2019

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Collectability of physically adsorbed xanthate ion–dixanthogen associates

Cited by 6 publications

References 9 publications

The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

The Effect of Seaweed Glue in the Separation of Copper–Molybdenum Sulphide Ore by Flotation

Search for new amide-class collecting agents and study of their flotation activity in the process of copper-nickel ore flotation

Removal of ethyl, isobutyl, and isoamyl xanthates using cationic gemini surfactant-modified montmorillonites

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