Chemisorption of ethyl xanthate on copper electrodes

Woods, R.; Basilio, C.I.; Kim, D.S; Yoon, Roe‐Hoan

doi:10.1016/0301-7516(94)90014-0

Cited by 17 publications

(13 citation statements)

References 15 publications

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“…By using a ultra-violet (UV-3100) spectroscopy to measure the absorbance at wave length 301 nm (Woods et al, 1994), the absorbed amount of SBX onto chalcopyrite and pyrite, in the presence of SGX, was determined over the pH range 7 ± 0.5. A 2.0 g sample of À38 lm sized pure mineral was pulped with 40 ml distilled water, and then the solution was stirred for 15 min followed by centrifugation at 4500 rpm for 10 min using a high speed refrigerated centrifuge while a known amount of desired regents was added.…”

Section: Adsorption Of Sbxmentioning

confidence: 99%

Selective chalcopyrite flotation from pyrite with glycerine-xanthate as depressant

Wang

Qian

et al. 2015

Minerals Engineering

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Section: Adsorption Of Sbxmentioning

confidence: 99%

Selective chalcopyrite flotation from pyrite with glycerine-xanthate as depressant

Wang

Qian

et al. 2015

Minerals Engineering

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“…Research studies on collector adsorption in various systems have been discussed in a number of publications [1][2][3][4][5]. As far as the sulfide ores are concerned, after long and controversial debates, it has now widely been accepted that there are two different mechanisms by which xanthate adsorbs on sulfide minerals: the chemisorption [6][7][8][9][10] process which results in the presence of chemisorbed metal xanthate at the mineral surface and an electrochemical [11,12] process where an oxidation product is formed at the surface of the sulfide.…”

Section: Introductionmentioning

confidence: 99%

Temperature effect on xanthate sorption by chalcopyrite

Mustafa¹,

Hamid²,

Naeem³

2004

Journal of Colloid and Interface Science

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“…Pomianowski ukazuju na to da joni ksantata mogu reagovati spontano sa površinom bakra, što dovodi do obrazovanja ksantatnih jedinjenja CuEtX i Cu(EtX) 2 prema reakcijama (4a) i (5) [25][26][27][28]. Tako, pojava ovog strujnog pika na voltamogramima (slike 5-7), odgovara formiranju jedinjenja na površini bakarne elektrode, kako sa ksantatom tako i sa diksantogenom.…”

Section: Merenja U Prisustvu Ketxunclassified

“…Oksidacija bakar-ksantata do diksantogena po reakciji (9) je termodinamički moguća pri potencijalu od -0,2 do 0 V prema SVE [27]. Oksidacija bakar-ksantata do bakar-oksida CuO i diksantogena (EtX) 2 inhibira flotaciju minerala bakra etilksantatom na višim potencijalima [6,25,27].…”

Section: Merenja U Prisustvu Ketxunclassified

Electrochemical investigation of cold worked copper in alkaline solution with the presence of potassium ethyl xanthate

Ivanov

Rajčić-Vujasinović

Petrović

et al. 2014

Hem Ind

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This paper presents the investigation results of the electrochemical behavior of copper in 1 M Na2CO3 solution in the presence of potassium ethyl xanthate (KEtX) with different concentrations. Tests were conducted on copper samples obtained without deformation and with deformation of 83, 91 and 99 %. Samples were obtained by cold drawing of wire, which was previously obtained by dip-forming procedure. Corrosion behavior of cold deformed copper wire is characterized by its open circuit potential and behavior during anodic polarization. Experiments were carried out in aqueous solution 1 M Na2CO3 with added various amounts of KEtX between 0.008 g/l and 0.15 g/l. It was experimentally proved that the degree of deformation between 83 and 99 % does not have a large effect on the open circuit potential, as well as on the behavior of copper during anodic polarization in 1 M Na2CO3. Voltammograms show no significant differences between peak heights obtained for different electrodes. The first peak which occurs at potential of around -0.06 V vs. SCE corresponds to the formation of copper oxide Cu2O. The second wide peak is at potential of around 0.15 V vs. SCE and corresponds to the formation of CuO. Addition of potassium ethyl xanthate in alkaline 1 M Na2CO3 solution changes the mechanism of the process in anodic part, which is reflected in the change of shape of voltammograms. In presence of KEtX in concentration between 0.008 g/l and 0.15 g/l on voltammograms a sharp peak appears at potential of about -0.2 V vs. SCE and corresponds to the oxidation of xanthate. Current density, which determines the rate of the process which takes place at the electrode surface, yet in the presence of smallest amounts of KEtX (<0,08 g/l) is higher than in the absence of KEtX. It allows one to conclude that the processes of oxidation of copper accelerate in presence of potassium ethyl xanthate.

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Chemisorption of ethyl xanthate on copper electrodes

Cited by 17 publications

References 15 publications

Selective chalcopyrite flotation from pyrite with glycerine-xanthate as depressant

Selective chalcopyrite flotation from pyrite with glycerine-xanthate as depressant

Temperature effect on xanthate sorption by chalcopyrite

Electrochemical investigation of cold worked copper in alkaline solution with the presence of potassium ethyl xanthate

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