Bayer Aktiengesellschaft

Rolf Muders

Hans-Gunter Otten

Gunter Gehrke

Horst Brandt

Otto Horak

Dieter Wiegner

Heinrich Leister

Helmut Dittmer

Hubert Schonhagen

Werner Beinert

Werner Falkenberg

A process for the decontamination of an effluent loaded with organic substances, which effluent has, where appropriate after the addition of a redox system, a redox potential of 300-600 mv measured at a platinum electrode versus a silver/silver chloride electrode, comprising oxidizing the effluent with oxygen or an oxygen-containing gas at a pH of 1 to 4, a temperature of 50.degree. to 200.degree. C. and a pressure of 1 to 60 bar in the presence of a redox catalyst and a co-catalyst comprising coal, lignite or peat which has been pretreated with alkali.

Process for the decontamination of effluents

Mixtures of disperse dyestuffs

A process for preparing 1-amino-4-bromoanthraquinone-2-sulphonic acid or an alkali metal salt thereof which comprises contacting 1-amino-anthraquinone at a temperature in the range of 90.degree. to 150.degree. C. with an SO.sub.3 -containing sulphuric acid (oleum) and thereafter treating the resultant sulphonated 1-amino-anthraquinone with at least 0.5 molar equivalent of bromine, relative to 1 mol of 1-amino-anthraquinone, at temperatures in the range from 60.degree. to 100.degree. C.

Process for the preparation of 1-amino-4-bromoanthraquinone-2-sulphonic

Growing community of inventors

Cologne, Germany

Rolf Muders