Basf Aktiengesellschaft

Dystar Textilfarben Gmbh & Co. Deutschland Kg

Verein Zur Forderung Der Forschung Und Entwicklung in Der

Eduard Burtscher

Thomas Bechtold

Norbert Grund

Wolfgang Schrott

Peter Maier

Georg Schnitzer

Franz S&uuml;tsch

Mediator systems obtainable by mixing a salt of an electrochemically active complexing metal (M1) capable of forming a plurality of valence states with a hydroxyl-containing complexing agent, which may likewise be present as salt, and with a salt of an electrochemically inactive complexing metal (M2) in an alkaline aqueous medium, wherefor the molar ratio of metal ion M2 to metal ion M1 is from 0.8:1 to 2:1 are useful for reducing dyes and dyeing cellulosic textile material.

Mediator systems based on mixed metal complexes, used for reducing dyes

In a method of producing reduced sulfur dyes, the improvement comprising cathodically reducing a sulfur dye to produce at least 150 Ah.kg,of reduction equivalents with respect to the solid dye, wherein at least 50 Ah.kg,is introduced by cathodic reduction.

Process for reducing sulphide dyestuffs

A process comprising the reduction of textile dyestuffs in an aqueous alkaline medium by means of a reducing compound which is a complex of an organic complexing agent and an iron (II)-salt. The iron (II)-salt is present in an amount sufficient to ensure the desired reduction of the dyestuff after a single oxidation.

Process for reduction of textile dyestuffs

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Bludenz, Austria

Eduard Burtscher