Metallothermic reduction of in-situ generated titanium chloride

C - Chemistry – Metallurgy – 25 – C

Patent

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C25C 3/28 (2006.01) C22B 5/00 (2006.01) C22B 34/12 (2006.01) C25C 3/00 (2006.01)

Patent

CA 2676247

A method for producing a pure metal M or metal alloy MxNy, of interest, which comprises electrolyzing a molten salt electrolyte of an alkali-metal or alkaline-earth metal halide AX or AX2, with an anode formed of graphite or made of a composite of a metal oxide of the metal of interest and carbon, to discharge the alkali or alkaline-earth metal A, at the cathode, and to discharge nascent chlorine gas at the anode, whereby to produce a halide of the metal of interest MXn and/or NXn, and metallothermically reducing the metal halide MXn and/or NXn either separately or combined, with the alkali or alkaline-earth metal A, obtained cathodically to produce the metal M or the metal alloy MxNy of interest in particulate form.

L'invention concerne un procédé pour produire un métal pur M ou un alliage métallique MxNy intéressant. Ledit procédé comporte l'électrolyse d'un électrolyte de sel fondu d'un halogénure de métal alcalin ou de métal alcalino-terreux AX ou AX2 au moyen d'une anode formée de graphite ou constituée d'un composite d'oxyde métallique du métal concerné et de carbone pour évacuer le métal alcalin ou alcalino-terreux A, au niveau de la cathode, et le chlorure gazeux naissant au niveau de l'anode. Ledit procédé vise à produire un halogénure du métal concerné MXn et/ou NXn et à réduire métallothermiquement l'halogénure métallique MXn et/ou NXn de manière séparée ou combinée avec le métal alcalin ou alcalino-terreux A obtenu de manière cathodique pour produire le métal M ou l'alliage métallique MxNy concerné sous une forme particulaire.

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