Process for removing dissolved selenium values from an acidic aq

Details Process for removing dissolved selenium values from an acidic aq Process for removing dissolved selenium values from an acidic aq

1982-04-09

1983-03-22

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

043775560

ABSTRACT:
Dissolved selenium values are removed from an acidic aqueous copper sulphate solution by treating the solution at a temperature of at least about 140.degree. C. with a stoichiometric excess relative to the dissolved selenium of sulphur dioxide or a sulphite solution to produce a selenium-containing precipitate and dissolved cuprous copper. The temperature of the treated solution is maintained at at least about 140.degree. C. and an oxygen containing gas is passed into the treated solution under a pressure of at least about 350 kPa to oxidize dissolved cuprous copper to dissolved cupric copper.

REFERENCES:
patent: 3914375 (1975-10-01), Clark et al.
patent: 3959097 (1976-05-01), Queneau et al.
patent: 4026797 (1977-05-01), Nikolic et al.
patent: 4222999 (1980-09-01), Weir et al.
patent: 4330508 (1982-05-01), Weir et al.
Zingaro; Ralph A., Selenium, 1974, pp. 46-56.

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