Precipitation of selenium from copper electrowinning solutions

Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow

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210 51, 210 56, 423510, 75121, C02C 502

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active

040267970

ABSTRACT:
Selenium is removed from copper electrolytes by adding a substance selected from the group consisting of metals above copper in the electromotive series, excluding alkali metals, such as nickel powder, cobalt powder and iron powder. Sodium sulfide can also be used along with a subsequent addition of ferric sulfate. The amount of the reactive substance added should be sufficient to reduce the selenium content to below 2 ppm.

REFERENCES:
patent: 2889206 (1959-06-01), Hobin
patent: 2930678 (1960-03-01), Oberbacher et al.
patent: 3933635 (1976-01-01), Marchant

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