Extraction of lithium from lithium bearing minerals by...

C - Chemistry – Metallurgy – 22 – B

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C22B 26/12 (2006.01) C01D 15/00 (2006.01) C22B 1/02 (2006.01) C22B 3/12 (2006.01)

Patent

CA 2644092

In a method of extracting lithium from a lithium bearing mineral, the mineral is reacted with a basic material of sufficient strength to dissolve the mineral, in order to produce a product mixture containing lithium. The lithium is then recovered from the product mixture. A method of extracting lithium from a lithium bearing mineral may consist of a two-step process. An industrial scale method of extracting lithium from a lithium bearing mineral can be conducted at a temperature not greater than about 500 °C and without the production of sulfur. A lithium metal can be produced by the method.

L'invention concerne un procédé d'extraction de lithium à partir d'un minéral contenant du lithium, le minéral étant mis en réaction avec un matériau basique de force suffisante pour dissoudre le minéral, de manière à obtenir un mélange contenant du lithium. Le lithium est ensuite récupéré à partir du mélange. Un procédé d'extraction du lithium à partir d'un minéral contenant du lithium peut consister en un procédé à deux étapes. Il est possible de réaliser un procédé d'extraction du lithium à l'échelle industrielle à partir d'un minéral contenant du lithium à une température inférieure ou égale à 500 °C et sans produire de soufre. Du lithium métallique peut également être obtenu par ce procédé.

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