Hydrometallurgical process for producing zinc oxide

Details Hydrometallurgical process for producing zinc oxide Hydrometallurgical process for producing zinc oxide

1993-10-15

1995-08-15

Bos, Steven

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iib metal

423100, 4233901, 423622, 423DIG14, C01G 900, C01G 902, C22B 1900, C01B 2138

Patent

active

054417120

ABSTRACT:
A hydrometallurgical process for producing zinc oxide from an aqueous solution containing zinc ions is provided. The process comprises the steps of contacting a zinc solution with an insoluble organic solvent selective to the extraction of zinc and thereby produce a zinc-loaded organic solvent. The zinc is then stripped from the zinc-loaded organic solvent with a solution of nitric acid to form a solution of zinc nitrate. The zinc nitrate solution is subjected to thermal hydrolysis at an elevated temperature in the presence of pressurized water vapor, the temperature being at least sufficient to decompose the zinc nitrate to zinc oxide which is thereafter recovered.

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