Method of removing Cr(VI) ions from an aqueous electrolyte solution

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United States of America Patent

PATENT NO 11389887
APP PUB NO 20200238411A1
SERIAL NO

16748876

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Abstract

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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 (1) for electrochemical machining of a workpiece (2) by means of an aqueous electrolyte solution (6), which has an ion exchanger (11) which has been loaded with an ion exchange resin charged with Fe(II) ions.

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Patent Owner(s)

Patent OwnerAddress
MTU AERO ENGINES AG80995 MÜNCHEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Feiling, Nicole Munich, DE 9 0
Hill, Rudolf Langenfeld, DE 5 40
Koenitzer, Martin Munich, DE 1 0
Mauer, Dieter Leverkusen, DE 52 712
Niegl, Max Munich, DE 11 22
Rast, Norbert Munich, DE 1 0

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