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:
Dec. 26, 1995
Filed:
Jul. 01, 1994
Lothar Schneider, Wachtersbach, DE;
Heraeus Elektrochemie GmbH, Hanau, DE;
Abstract
An aqueous solution containing metal ions and sulfuric acid, especially a solution containing zinc ions, iron ions and/or copper ions, is placed for the cathodic precipitation of the metal ions into the anolyte chamber of an electrolysis cell divided by a cation exchanger membrane. Due to the voltage applied to the electrodes, metal ions and hydrogen ions migrate from the anolyte through the cation exchange membranes into the catholyte chamber and are there discharged, the sulfuric acid concentration in the anolyte being constantly elevated by anodic formation of protons. The regeneration can be used as an intermediate step of a chlorine gas-free regeneration of etching or extraction solutions.