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:
Jul. 19, 2022
Filed:
Jan. 22, 2020
Mtu Aero Engines Ag, Munich, DE;
Nicole Feiling, Munich, DE;
Max Niegl, Munich, DE;
Martin Koenitzer, Munich, DE;
Norbert Rast, Munich, DE;
Rudolf Hill, Langenfeld, DE;
Dieter Mauer, Leverkusen, DE;
MTU AERO ENGINES AG, Munich, DE;
Abstract
The invention relates to a method for removing Cr(VI) ions from an aqueous electrolyte solution, particularly an electrolyte solution for electrochemical metal machining, which comprises the reduction of Cr(VI) to Cr(III) with Fe(II) ions. The Fe(II) ions are added to the electrolyte solution in the form of an aqueous salt solution which has been brought into contact with an ion exchange resin loaded with Fe(II) ions. The invention further relates to a device () for electrochemical machining of a workpiece () by means of an aqueous electrolyte solution (), which has an ion exchanger () which has been loaded with an ion exchange resin charged with Fe(II) ions.