Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Patent
1990-02-14
1991-07-02
Davis, Curtis R.
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
423105, 210197, C01G 902
Patent
active
050284100
ABSTRACT:
A process is provided for obtaining high quality high surface area zinc oxide from a roasted zinc sulphide concentrate by leaching with an ammoniacal ammonium carbonate solution. The process utilizes optional preliminary oxidation and water leaching steps to remove soluble impurities and an optional aqueous sulphur dioxide leaching step to selectively remove readily soluble zinc oxide. The process also includes an optional reduced pressure calcining step to produce zinc oxide with further increased surface area.
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Nguyen Kim D.
Robinson Murry C.
Spink Donald R.
Breneman R. Bruce
Davis Curtis R.
Material-Concepts-Research Limited
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