Liquid purification or separation – With alarm – indicator – register – recorder – signal or... – Responsive to fluid flow
Patent
1976-04-19
1977-05-31
Wyse, Thomas G.
Liquid purification or separation
With alarm, indicator, register, recorder, signal or...
Responsive to fluid flow
210 51, 210 56, 423510, 75121, C02C 502
Patent
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
Laferty John M.
Nikolic Cvetko B.
Amax Inc.
Castel Benoit
Kalil Eugene J.
Serijan Kasper T.
Wyse Thomas G.
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