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US 4,016,054 AGranted
Hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel
AssigneeImetal
InventorsLouis Gandon, Jean-Michel Demarthe
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Abstract
The present invention relates to a hydrometallurgical treatment process for extracting, in a pure (elemental) or other valuable (i.e. commercially usable) form, constituent metals from ferro-nickel, that is nickel, cobalt, iron and sometimes chromium.
Claims22
A hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel containing cobalt, comprising the following steps:
- a. treating said ferro-nickel with chlorine in an aqueous medium and filtering the resultant matter;
- b. oxidising said filtrate;
- c. removing the iron contained in said oxidised filtrate by liquid/liguid extraction using an organic extractant (i) containing tributyl phosphate and regenerating said organic extractant (i) using an aqueous stripping solution (ii) thus yielding a pure aqueous solution of ferric chloride;
- and
- d. removing the cobalt contained in said oxidised filtrate by liquid/liquid extraction using an organic extractant (iii) containing a tertiary amine and regenerating said organic extractant (iii) using an aqueous stripping solution (iv) thus yielding a pure aqueous solution of cobalt cloride, the chloride, oxidised filtrate comprising a solution of nickel chloride.
2 more elements
A hydrometallurgical treatment process for extracting constituent metal values from ferro-nickel containing cobalt and chromium, comprising the following steps:
- a. treating said ferro-nickel with chlorine in an aqueous medium and filtering the resultant matter;
- b. oxidising said filtrate;
- c. removing the iron contained in said oxidised filtrate by liquid/liquid extraction using an organic extractant (i) containing tributyl phosphate and regenerating said organic extractant (i) using an aqueous stripping solution (ii) thus yielding a pure aqueous of ferric chloride;
- d. removing the cobalt contained in said oxidised filtrate by liquid/liquid extraction using an organic extractant (iii) containing a tertiary amine and regenerating said organic extractant (iii) using an aqueous stripping solution (iv) thus yielding a pure aqueous solution of cobalt chloride;
- and
- e. removing the chromium contained in said oxidised filtrate by liquid/liquid extraction using an organic extractant (v) containing an alkylphosphoric acid and regenerating said organic extractant (v) using an aqueous stripping solution (vi) thus yielding a pure aqueous solution of chromium chloride, the resultant oxidised filtrate comprising a solution of nickel chloride.
3 more elements
Dependencies are inferred from the claim text.