Chloride melt process for the separation and recovery of zinc

C - Chemistry – Metallurgy – 22 – B

Patent

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C22B 9/02 (2006.01) C01G 9/04 (2006.01) C22B 1/08 (2006.01) C22B 19/00 (2006.01) C22B 19/04 (2006.01) C25C 3/34 (2006.01)

Patent

CA 2460883

Process for the production of ZnCl2 from a Zn bearing primary and/or secondary material comprising the steps of reacting the Zn bearing material with a chlorinating agent such as Cl2 to convert metals into chlorides and vaporising the volatile components of the reaction product at a temperature between the melting point of said reaction product and the boiling point of ZnCl2, thereby recovering a Zn rich chlorinated melt, and thereafter distilling ZnCl2 from this Zn rich chlorinated melt, thereby recovering purified ZnCl2 and a Zn- depleted chlorinated melt.

L'invention concerne un procédé de production de ZnCl¿2? à partir d'une matière primaire et/ou secondaire contenant du Zn. Ce procédé consiste à faire réagir la matière contenant du Zn avec un agent de chloration tel que Cl¿2? de façon à convertir les métaux en chlorures et à vaporiser les composés volatils du produit de réaction à une température comprise entre le point de fusion dudit produit de réaction et le point d'ébullition de ZnCl¿2?, d'où la récupération d'une matière fondue chlorée riche en Zn, puis à distiller le ZnCl¿2? à partir de cette matière fondue chlorée riche en Zn, d'où la récupération de ZnCl¿2? purifié et d'une matière fondue chlorée appauvrie en Zn.

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