The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 1980
Filed:
Jul. 05, 1979
Oronzio de Nora Impianti Elettrochimici S.p.A., Milan, IT;
Abstract
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 off-peak method of electrolysis operation to reduce energy consumption and to reduce or eliminate ferrous sulfate by-product.