Dixanthogen

Dixanthogen

Deendence of Froth Behaviour on Galvanic Interactions

Published in J. S. Laskowski, E. T. Woodburn, Frothing in Flotation II, 2018

The anodic process is usually charge transfer chemisorption of xanthate: X−→Xads+e− and/or oxidation of xanthate (X−) to dixanthogen (X2): 2X−→X2+2e− and/or formation of a metal xanthate (MX2): MS+2X−→MX2+S+2e− The sulphur component of the mineral surface can also be oxidised to form SxOy species as metal xanthates.

Sulfur content reduction of iron concentrate by reverse flotation

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Journal Information

Published in Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 2023

Fardis Nakhaei, Mehdi Irannajad, Sima Mohammadnejad, Amir Hajizadeh Omran

Xanthate adsorption mechanisms on pyrite surfaces have been the subject of a number of studies (Ball and Rickard 1976; Finkelstein 1997; Woods 1988). Dixanthogen is the product of xanthate adsorption/reaction on pyrite and is responsible for pyrite flotation, independent of solution and pyrite surface conditions, that is a commonly admitted conclusion. This final outcome was on the basis of the results of IR, UV, flotation and rest-potential studies (Allison et al., 1972; Fuerstenau, Kuhn, and Elgillani 1968; Majima and Takeda 1968). Dixanthogen is made by the xanthate ion anodic oxidation at the surface of pyrite, associated with the cathodic reduction of adsorbed oxygen (Fuerstenau, Kuhn, and Elgillani 1968):

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Deendence of Froth Behaviour on Galvanic Interactions

Sulfur content reduction of iron concentrate by reverse flotation