The Action of Potassium n-Amyl Xanthate on Chalcocite.

Gaudin, A. M.; Schuhmann, R.

doi:10.1021/j150371a012

Cited by 29 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Wark and Cox (1934) have shown that maximum contact angle was determined by the length of the alkyl chain and was independent of the nature of the substrate. Gaudin and Schuhmann (1936) established that chalcocite abstracts amounts of xanthate equivalent to Figure 8.2. Autoradiography of adsorbed surfactants: (a) xanthate (white spots) on the face of a sphalerite particle, 500 x, , from , An Introduction to the Theory of Flotation, Trans.…”

Section: Mechanisms Of Xanthate Adsorptionmentioning

confidence: 93%

Surface Chemistry of Froth Flotation

Leja¹

1981

264

147

View full text Add to dashboard Cite

Section: Mechanisms Of Xanthate Adsorptionmentioning

confidence: 93%

Surface Chemistry of Froth Flotation

Leja¹

1981

264

147

View full text Add to dashboard Cite

“…1990). Molecular area of the adsorbate is determined using the interatOlnic distances available in literature and the geometry of the molecule (W clls, 1986) as the basis of the figures for the radii of Sand 0 and asswning a spherical shape tlle area of xanthate group is estimated to be 0.25 nm 2 (Gaudin et al .. 1936) and that of dixanthogen 0.493 mn 2 (Rao and Finch, 1991). A dithiophosphate with two hydrocarbon chains is estimated to occupy an area of0.41mn 2 and carboxylic acids 0.205 mn 2 per moleule (Gaudin, 1957, p. 272;Lovell et al, 1974).…”

Section: Dctcrmination Of Surfacc Co\'cragcmentioning

confidence: 99%

Surface Chemistry of Froth Flotation

Rao

2004

View full text Add to dashboard Cite

“…The major lead flotation for lead-copper concentrate is done at a pH of 9.5-10 and an average concentration of the butyl xanthate of 25 mg/liter = 1.68"10 -4 m. With the interaction of galena and secondary sulfides of copper and a solution of xanthate, xanthates of the metals are formed at their surfaces, which also define the flotation activity of chalcocite, bornite [6,7], and galena [7].…”

Section: Selection Of Lead-copper Concentratementioning

confidence: 99%

Electrochemical method of pulp preparation in selective flotation enrichment of copper-bearing sulfide ores

Chanturia¹,

Vigdergauz²

1987

Soviet Mining Science

View full text Add to dashboard Cite

The classical means of altering the physicochemical properties of mineral surfaces during flotation is by using chemical reagents -modifiers.The interaction of the mineral with the collector depends on the potential.Therefore flotation is, in the general case, observed in a limited region of potentials.Chemical alteration of the redox state of the flotation pulp is accomplished by reagents -reducers such as sodium sulfide or by oxidizers of the permanganate, dichromate, or oxygen types.The action of chemical reagents on the static potential of sulfide mineral-semiconductors is often similar.Therefore, chemical modification is not always selective.The direct alteration of the potential of reworked minerals is opening up new perspectives in this direction, using their electrochemical charge without changing the composition of the pulp's liquid phase [i, 2]. Our work is devoted to a consideration of the mechanism and results of electrochemical modification of the selective flotation separation for copperzinc, copper-lead, and copper-molybdenum ores.i. Zinc Pyrite Selection.The main purpose of the zinc cycle in the engineering enrichment of copper-zinc pyrite ores is the separation of zinc sulfide and iron. A copperzinc ore impregnate was selected as the object of study, which had not been reworked in a selective scheme of enrichment.The physical and chemical properties of the major ore minerals.., pyrite, chalcopyrite, and sphalerite.., were studied using x-ray phase analysis and x-ray-photoelectron spectroscopy.The method of cyclical voltammetrometry, in conjunction with the rotating disk electrode method, was used for studying electrochemical properties.Sorption of the xanthate and its derivatives was evaluated by selective desorption by organic solvents.Flotation experiments were conducted after electrochemical conditioning of the pulp in equipment of the diaphragm and nondiaphragm types, controlling the ionic state of the liquid phase of the pulp and its concentration of dissolved oxygen {3].Analysis of the voltammetrograms for the main sulfide minerals in the composition of copper-zinc pyrite ore indicates that the mineral-semiconductors (pyrite and chalcopyrite) are subject to electrochemical actions, but the observed redox transitions of iron sphalerite are related to a pyrite impurity.In Fig. i, curves are presented for total sorption of the xanthate and its derivatives by pyrite, chalcopyrite, and sphalerite during the electrochemical processing of a mixture of them.The curves show that at a potential of +0.7 V or greater, the anodic charge leads to a growth in collector sorption, which is mainly in the form of dixanthide. Cathodic treatment at a potential of -0.4 V causes desorption of the reduced collector from the surface of the conducting minerals, pyrite and chalcopyrite.On the other hand, the mineraldielectric sphalerite sorbs an additional amount of collector, which was transitional to a liquid phase from the pyrite and chalcopyrite.Performing a directed control of the sorption and desorption process...

show abstract

The Action of Potassium n-Amyl Xanthate on Chalcocite.

Cited by 29 publications

References 4 publications

Surface Chemistry of Froth Flotation

Surface Chemistry of Froth Flotation

Surface Chemistry of Froth Flotation

Electrochemical method of pulp preparation in selective flotation enrichment of copper-bearing sulfide ores

Contact Info

Product

Resources

About