Observations on the solid system CuCl2-KCl in the temperature range 293–673 K

Żurowski, K.

doi:10.1007/bf02123990

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…2 D, Right ). The color change of molten salt should be attributed to the generation and accumulation of CuCl ( 47 , 48 ), which is verified by the X-ray diffraction (XRD) pattern of the molten LiCl-KCl after electrolysis ( SI Appendix , Fig. S5 ).…”

Section: Resultsmentioning

confidence: 70%

Anode electrolysis of sulfides

Chen

Xie

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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Traditional sulfide metallurgy produces harmful sulfur dioxide and is energy intensive. To this end, we develop an anode electrolysis approach in molten salt by which sulfide is electrochemically split into sulfur gas at a graphite inert anode while releasing metal ions that diffuse toward and are deposited at the cathode. The anodic splitting dictates the “sulfide-to-metal ion and sulfur gas” conversion that makes the reaction recur continuously. Using this approach, Cu 2 S is converted to sulfur gas and Cu in molten LiCl-KCl at 500 °C with a current efficiency of 99% and energy consumption of 0.420 kWh/kg −Cu (only considering the electricity for electrolysis). Besides Cu 2 S, the anode electrolysis can extract Cu from Cu matte that is an intermediate product from the traditional sulfide smelting process. More broadly, Fe, Ni, Pb, and Sb are extracted from FeS, CuFeS 2 , NiS, PbS, and Sb 2 S 3 , providing a general electrochemical method for sulfide metallurgy.

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Section: Resultsmentioning

confidence: 70%

Anode electrolysis of sulfides

Chen

Xie

et al. 2022

Proc. Natl. Acad. Sci. U.S.A.

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“…7). It arises as a result of reaction (1), but also of reaction (4). Thus, equilibrium of reaction (3) …”

Section: Discussionmentioning

confidence: 97%

“…In paper [1], assumptions were made to describe the results. At a molar ratio Cu/K from 0.5 to 1.0, the solid system CuCI2-KCI undergoes a phase change at 533-543 K, and melts at 573-593 K or 603-623 K [4,5]. A crystal lattice constitution which undergoes the melting process has been established [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Changes in ion composition in the liquid system CuCl2-KCl, investigated by thermogravimetry

Żurowski

1996

Journal of Thermal Analysis

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CuC12-KC1 mixtures were annealed at 603 K and thermogravimetrically analysed after cooling to room temperature. The mixtures differed in the molar ratio Cu/K and in the duration of heating at 603 K. The constitutions of the ions, the reactions between them and the mechanisms of their decomposition in the melt are proposed, as are the constitutions of the active centres in the oxyehlorination process.

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Reproducibility of phase changes in the system CuCl2−KCl

Żurowski

1995

Journal of Thermal Analysis

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Observations on the solid system CuCl2-KCl in the temperature range 293–673 K

Cited by 4 publications

References 3 publications

Anode electrolysis of sulfides

Anode electrolysis of sulfides

Changes in ion composition in the liquid system CuCl2-KCl, investigated by thermogravimetry

Reproducibility of phase changes in the system CuCl2−KCl

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