Bayer Aktiengesellschaft

Mtu Aero Engines Ag

Bk Giulini Gmbh

Miontec Gmbh

Dieter Mauer

Reinhold M Klipper

Bernhard Lehmann

Ulrich Schnegg

Bruno Hees

Max Niegl

Holger L&uuml;tjens

Nicole Feiling

Werner Str&uuml;ver

Heiko Hoffmann

Rudolf Hill

Norbert Rast

Andreas Temme

Martin Koenitzer

Lentes Marvin

Birgit Kalker

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.

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

The present invention relates to a process for preparing novel, monodisperse crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds, in particular heavy metal compounds or noble metal compounds.

Process for preparing monodisperse, crosslinked bead polymers having thiourea groups and their use for adsorbing metal compounds

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Leverkusen, Germany

Dieter Mauer