Assessment of the use of lignosulfonates to separate chalcopyrite and molybdenite by flotation

Gutiérrez, Leopoldo; Uribe, Lina; Hernández, Vicente; Vidal, Claudia; Mendonça, Regis Texeira

doi:10.1016/j.powtec.2019.10.015

Cited by 31 publications

(33 citation statements)

References 15 publications

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“…LS can be used as binders, emulsion stabilizers, dispersants in oil drilling and coal-water slurry, paper coating, and cement admixtures (Ouyang et al 2009;Yu et al 2013;Ge et al 2014;He and Fatehi 2015;Huang et al 2018). Furthermore, because LS are strongly anionic polyelectrolytes that tend to interact with mineral surfaces, they have been investigated for mineral separation (Pradip and Fuerstenau 1991;Kelebek et al 2001;Mu et al 2016;Liu et al 2018;Gutierrez et al 2020). Sadowski (1995) used sodium LS for the selective separation of salt-like minerals (barite, calcite, dolomite, magnesite) in agglomeration with carbonate minerals, achieving the separation of barite by the addition of LS.…”

Section: Introductionmentioning

confidence: 99%

“…The most important mineral byproduct from copper mining is molybdenum. To obtain copper and/or molybdenum, the recovery and separation of copper sulfides, such as chalcopyrite (CuFeS2), chalcocite (Cu2S), bornite (Cu5FeS4), and covellite (CuS), from molybdenite (MoS2) is needed; this recovery is performed through a two-stage flotation process (Ansari et al 2007a,b;Gutierrez et al 2020). In this process, sodium hydrosulfide (NaHS) is widely used for the selective separation of minerals, as its consumption could reach 20% of the total reagent consumption.…”

Section: Introductionmentioning

confidence: 99%

“…In this process, sodium hydrosulfide (NaHS) is widely used for the selective separation of minerals, as its consumption could reach 20% of the total reagent consumption. As NaHS is a highly toxic reagent, there are environmental and economic incentives to use fewer chemicals in a more efficient process (Ansari et al 2007a,b;Gutierrez et al 2020). In this sense, the use of LS might represent an environmentally friendly alternative for mining activity; however, the limited worldwide production of LS represents a significant drawback (He and Fatehi 2015;Konduri and Fatehi 2015).…”

Section: Introductionmentioning

confidence: 99%

“…In this sense, the use of LS might represent an environmentally friendly alternative for mining activity; however, the limited worldwide production of LS represents a significant drawback (He and Fatehi 2015;Konduri and Fatehi 2015). Recently, Gutierrez et al (2020) reported the separation of chalcopyrite and molybdenite by flotation using lignin derivatives, observing similar adsorption behavior among the different lignin types.…”

Section: Introductionmentioning

confidence: 99%

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Sulfomethylation of radiata pine kraft lignin and its use as a molybdenite depressant in selective chalcopyrite-molybdenite separation by flotation

Vidal

Carrillo-Varela

Reyes-Contreras³

et al. 2021

BioRes

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Sulfomethylation of radiata pine kraft lignin was performed using formaldehyde and sodium sulfite under alkaline conditions to determine its potential as a mineral depressant for the separation of molybdenite and chalcopyrite by froth flotation. Optimal conditions for the sulfomethylation reaction were 20% (w/w) Na2SO3 at 130 °C for 4.2 h, which resulted in lignin with a sulfonate content of 2.2 mmol/g. Microflotation assays showed that the optimized sulfomethylated kraft lignin (OSKL) depressed the molybdenite in flotation by 93% using 200 mg/L OSKL, while only 5% chalcopyrite depression was achieved. The performance of OSKL was compared with those of commercial lignosulfonates, and the OSKL displayed a better ability to separate molybdenite and chalcopyrite, even at lower concentration doses. FTIR and 1H-NMR analyses showed that sulfonic groups were incorporated into the C5 position of the aromatic ring and into the aliphatic chain of the OSKL. The hydroxymethyl content of the OSKL was increased, and most β-O-4′, β-1′ and β-5′ bonds were broken, with the exception of the β-β’ bond. Sulfomethylation gives kraft lignin the chemical characteristics of a wood-based molybdenite depressant, making it an alternative to current reagents used in the chalcopyrite-molybdenite flotation process.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sulfomethylation of radiata pine kraft lignin and its use as a molybdenite depressant in selective chalcopyrite-molybdenite separation by flotation

Vidal

Carrillo-Varela

Reyes-Contreras³

et al. 2021

BioRes

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“…Sulfide ores are main mineral resource of non-ferrous metals and are widely used to extract elements such as copper, lead, zinc, molybdenum and nickel [1][2][3][4][5][6]. Demond for non-ferrous metals is growing in response to continuous advances in science and technology [7,8].…”

Section: Introductionmentioning

confidence: 99%

Study on Phase Transfer Catalyst Used in the Synthesis of Sodium Isobutyl Xanthate

Cheng

Weng

et al. 2021

Minerals

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Xanthates are by far the most widely used collectors in the froth flotation beneficiation of sulfide ores. However, the xanthate production process suffers from low yield, low productivity, long reaction time and environmental pollution. To address these issues, an effective method was developed for the synthesis of xanthates using phase transfer catalyst. Sodium isobutyl xanthate was synthesized from isobutyl alcohol ((CH3)2CHCH2OH), sodium hydroxide (NaOH) and carbon disulfide (CS2) with dichloromethane (CH2Cl2) as solvent and cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC), tetrabutylammonium bromide (TBAB) and tetrabutylammonium chloride (TBAC) as phase transfer catalyst. The compound was characterized by elemental analysis, infrared spectrum, 1H NMR and 13C NMR. The influencing factors on the content and yield of sodium isobutyl xanthate including phase transfer catalyst type, phase transfer catalyst dosage and reaction time were studied by single-factor experiments. The influencing factors on the product purity and yield including reaction temperature, solvent volume, material ratio and rotating speed were studied by orthogonal experiments. The results showed that when the amount of TBAC was 3.0%malcohol, the reaction temperature was 35 °C, the solvent volume was 3.5 Valcohol, the rotating speed was 180 rpm, the reaction time was 4 h and the material ratio was n[(CH3)2CHCH2OH]:n(NaOH):n(CS2) = 1:1:1.10, the product yield could be up to 86.66% and the product purity reached 82.56%.

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Lignin

Chehreh Chelgani,

Neisiani,

Wonyen

et al. 2024

Green Flotation Depressants

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Assessment of the use of lignosulfonates to separate chalcopyrite and molybdenite by flotation

Cited by 31 publications

References 15 publications

Sulfomethylation of radiata pine kraft lignin and its use as a molybdenite depressant in selective chalcopyrite-molybdenite separation by flotation

Sulfomethylation of radiata pine kraft lignin and its use as a molybdenite depressant in selective chalcopyrite-molybdenite separation by flotation

Study on Phase Transfer Catalyst Used in the Synthesis of Sodium Isobutyl Xanthate

Lignin

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