Method for the recovery of zinc oxide

Details Method for the recovery of zinc oxide Method for the recovery of zinc oxide

C - Chemistry, Metallurgy

01

G

C01G 9/02 (2006.01) C21B 13/00 (2006.01) C22B 5/10 (2006.01) C22B 7/00 (2006.01) C22B 7/02 (2006.01) C22B 19/28 (2006.01) C22B 19/30 (2006.01) C22B 19/34 (2006.01)

Patent

CA 2127277

A method for the recovery of zinc oxide from industrial waste materials of various components, including zinc, lead, iron and cadmium, comprising the steps of treating the waste material with an ammonium chloride solution maintained at an elevated temperature, separating the undissolved components from the, solution, treating the solution with zinc metal to displace undesired metal ions from the solution, cooling the solution to precipitate therefrom zinc compounds, washing the precipitated zinc compounds to remove unwanted compounds such as diamino zinc dichloride, and drying the remaining zinc compound which is essentially hydrated zinc oxide, resulting in essentially pure zinc oxide.

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