C - Chemistry – Metallurgy – 25 – B
Patent
C - Chemistry, Metallurgy
25
B
204/80
C25B 1/00 (2006.01) C01G 49/00 (2006.01) C25B 15/08 (2006.01)
Patent
CA 1132092
ABSTRACT OF THE DISCLOSURE A method of reducing ferric ions in a sulfuric acid ilmenite leach solution to ferrous ions comprising circulating a sulfuric acid ilmenite leach catholyte solution through the cathodic compartment of an electrolysis cell separated by a fluid-impervious anion exchange membrane from the anodic compartment, circulating a ferrous sulfate anolyte solution through the anodic compartment of the electrolysis cell and impressing an electrolysis current across the cell to reduce the ferric ions in the catholyte to ferrous ions and to oxidize a portion of the ferrous ions to ferric ions in the anolyte to prevent oxygen evolution in the anodic compartment and to an electric power off-peak method of electrolysis operation to reduce energy consumption and to reduce or eliminate ferrous sulfate by-product.
337453
Bianchi Giuseppe
Pellegri Alberto
Traini Carlo
de Nora (oronzio) Impianti Elettrochimici S.p.a.
Macrae & Co.
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