process for the production of a mixture of 1 - amino - 2 - chloro - 4 - hydroxyanthrachinon and 1 - amino - 2 - bromine - 4 - hydroxyanthrachinon.

摘要

A process for the preparation of a mixture of 1-amino-2-chloro-4-hydroxyanthraquinone and 1-amino-2-bromo-4-hydroxyanthraquinone, which mixture contains a high proportion of 1-amino-2-chloro-4-hydroxyanthraquinone, by chlorinating and brominating 1-aminoanthraquinone and reacting the intermediate so obtained with concentrated or fuming sulfuric acid.