Basf Aktiengesellschaft

Basf Aktiengsellschaft

Helmut Reinicke

Manfred Ohlinger

Heinz Eilingsfeld

Heinrich Hiller

Norbert Mueller

Gerhard Honecker

Bernhard Boettcher

Fritz Traub

A process for the preparation of chromium(III) oxide by decomposing hydrated ammonium dichromate at elevated temperatures, an apparatus for carrying out this process and the use of the chromium(III) oxide thus prepared as a starting material for the synthesis of chromium dioxide.

Preparation of chromium(III) oxide

In a process for the preparation of 1-amino-2-phenoxy-4-hydroxyanthraquinone by reacting 1-amino-2-halogeno-4-hydroxyanthraquinone with a phenol in an alkaline aqueous medium at an elevated temperature, the improvement that 1-amino-2-chloro-4-hydroxyanthraquinone is reacted in aqueous suspension, at a pH of from 9 to 13 and at from 120.degree. to 150.degree. C., with the phenol in the presence of

Preparation of 1-amino-2-phenoxy-4-hydroxyanthraquinone

Growing community of inventors

Gruenstadt, Germany

Helmut Reinicke