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:
Sep. 24, 2013
Filed:
Nov. 22, 2010
Applicants:
Mikko Ruonala, Kantvik, FI;
Kurt Svens, Espoo, FI;
Antti Arpalahti, Vuokatti, FI;
Karoliina Lepistö, Espoo, FI;
Inventors:
Mikko Ruonala, Kantvik, FI;
Kurt Svens, Espoo, FI;
Antti Arpalahti, Vuokatti, FI;
Karoliina Lepistö, Espoo, FI;
Assignee:
Outotec Oyj, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01G 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for removing chloride from zinc sulphate solution in conjunction with zinc production. According to the method, the chloride is removed from solution by means of monovalent copper, which is produced in a separate copper(I) oxide formation stage, in which the pH is regulated to the region of 4.5-5.