Primary production of elements

C - Chemistry – Metallurgy – 25 – C

Patent

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Details

C25C 1/00 (2006.01) C25B 1/00 (2006.01) C25C 3/00 (2006.01) C25C 3/26 (2006.01) C25C 3/34 (2006.01)

Patent

CA 2759805

Electrowinning methods and apparatus are suitable for producing elemental deposits of high quality, purity, and volume. Respective cathodes are used during electrowinning for bearing the elemental product, segregating impurities, dissolving morphologically undesirable material, and augmenting productivity. Silicon suitable for use in photovoltaic devices may be electrodeposited in solid form from silicon dioxide dissolved in a molten salt.

La présente invention a pour objet des procédés et un appareil d'extraction électrolytique appropriés pour la production de dépôts élémentaires de qualité, de pureté, et de volume élevés. Des cathodes respectives sont utilisées pendant l'extraction électrolytique pour porter le produit élémentaire, isoler les impuretés, dissoudre la substance morphologiquement indésirable, et augmenter la productivité. Du silicium approprié pour une utilisation dans des dispositifs photovoltaïques peut être déposé électrolytiquement sous forme solide à partir de dioxyde de silicium dissous dans un sel fondu.

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