Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1983-07-11
1984-03-27
Demers, Arthur P.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
204119, C23B 510, C25B 1103
Patent
active
044392885
ABSTRACT:
The present invention contemplates treating a zinc sulfate containing solution, especially a neutral leach filtrate with a reducing agent selected from ZnSO.sub.3, SO.sub.2 or mixtures thereof to substantially reduce the oxidant therein and to obtain a solution having a predetermined pH. Thus, in one embodiment of the present invention, a neutral leach filtrate containing an oxidant selected from permanganate and manganate ions and mixtures thereof is treated with a reducing agent selected from ZnSO.sub.3, SO.sub.2 or mixtures thereof in amounts sufficient to substantially reduce all the manganese ions present (permanganate and/or manganate) to the divalent state and to provide a zinc sulfate solution for electrodeposition of the zinc having a predetermined pH.
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Partington, Textbook of Inorganic Chemistry, 6th Edition, 1950, p. 467.
Demers Arthur P.
Dvorak Joseph J.
Exxon Research & Engineering Company
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