Method for removing arsenic from copper and/or nickel bearing aq

Details Method for removing arsenic from copper and/or nickel bearing aq Method for removing arsenic from copper and/or nickel bearing aq

1976-12-03

1978-09-19

Vertiz, O. R.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ib metal

423 87, 423139, C01B 2700

Patent

active

041155122

ABSTRACT:
A method is disclosed for removing arsenic by solvent extraction from a copper and/or nickel bearing aqueous solution containing about 100 to 600 gpl sulphuric acid. The method comprises contacting the solution with an organic solution consisting of about 5 to 80% by volume of tributylphosphate in an organic diluent, and subsequently stripping the arsenic from the loaded organic solution with a suitable stripping agent. Particularly, when the sulphuric acid concentration in the aqueous solution is lower than 300 gpl, the organic solution advantageously comprises up to about 15% of a quaternary ammonium reagent. Preferred quaternary ammonium reagents are tricaprylmethyl ammonium chloride and mixtures of tri-C.sub.8 -C.sub.10 methylammonium chlorides.

REFERENCES:
patent: 3473919 (1969-10-01), Metcalfe et al.
patent: 3785803 (1974-01-01), Moore
Blake et al., "Solvent Extraction of Uranium and Other Metals by Acidic and Neutral Organophosphorus Compounds", pp. 289-298.

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