PROCESS FOR THE PREPARATION OF IRON YELLOW PIGMENTS

摘要

A Process for the Preparation of Iron Yellow Pigments An improved process is disclosed for preparing iron yellow pigments from iron - (II) salt solutions, in the presence of iron scrap, by injection of air at elevated temperatures. After formation of the pigment, the reaction suspension is stirred without additional gas injection, whereby lighter, purer yellow pigments are obtained. Le A 26 524