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:
May. 23, 2006
Filed:
Jun. 06, 2001
Armin Olbrich, Seesen, DE;
Astrid Görge, Goslar, DE;
Frank Schrumpf, Goslar, DE;
Juliane Meese-marktscheffel, Goslar, DE;
Viktor Stoller, Bad Harzburg, DE;
Gerhard Gille, Goslar, DE;
Josef Schmoll, Goslar, DE;
Michael Kruft, Goslar, DE;
Dirk Naumann, Mississauga, CA;
Armin Olbrich, Seesen, DE;
Astrid Görge, Goslar, DE;
Frank Schrumpf, Goslar, DE;
Juliane Meese-Marktscheffel, Goslar, DE;
Viktor Stoller, Bad Harzburg, DE;
Gerhard Gille, Goslar, DE;
Josef Schmoll, Goslar, DE;
Michael Kruft, Goslar, DE;
Dirk Naumann, Mississauga, CA;
H.C. Starck GmbH, Goslar, DE;
Abstract
The invention relates to a method for producing metal hydroxides or alkaline metal carbonates by anode dissolution of the corresponding metals and precipitation of the hydroxides or alkaline carbonates in an aqueous medium. The anode dissolution of the metal components is carried out in the anode compartment of a three-compartment electrolytic cell. An aqueous auxiliary salt solution is fed to an intermediate compartment that is disposed between the anode compartment and the cathode compartment and that is separated therefrom by a porous membrane. An at least not alkaline metal salt solution is continuously taken from the anode compartment while an alkaline auxiliary salt solution is continuously taken from the cathode compartment. The at least not alkaline metal salt solution and the alkaline auxiliary salt solution are combined outside the electrolytic cell for the purpose of precipitating metal hydroxides or alkaline metal carbonates.