Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group ib metal
Patent
1982-06-24
1983-02-22
Vertiz, O. R.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group ib metal
423 43, 423509, 423557, 204108, C01G 310, C01B 1904
Patent
active
043748082
ABSTRACT:
Selenium (IV) and selenium (VI) are removed from acidic copper-nickel sulphate solutions in a two-stage process by adjusting and maintaining the sulphuric acid content of the solution in a range of 10 to 50 g/L and, in a first stage, contacting the solution with sulphur dioxide or a sulphite-containing solution at an elevated temperature in the range of about 140.degree. to 175.degree. C. and, in a second stage, maintaining the said solution at an elevated temperature in the range of about 140.degree. to 200.degree. C. and pressure within the range of about 400 to 1750 kPa in an essentially oxygen-free atmosphere for a sufficient retention time to reduce and precipitate selenium (VI) as cuprous selenide.
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Hofirek Zdenek
Kerfoot Derek G. E.
Weir Donald R.
Delbridge Robert F.
Fors Arne I.
Sherritt Gordon Mines Limited
Stoll Robert L.
Vertiz O. R.
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