Utilization of tannery wastes for the production of sodium chromate(VI)

This paper presents results of research on utilizing chromic waste, such as chromic mud from the current production and chromic tannery waste in the sodium chromate production process, in the area determined by the range of variation of selected process parameters. It was established that it was possible to substitute chromic ore used as a raw material for the production of sodium chromate with solid chromic tannery waste. The difference between the quantities of chromic mud produced and that used in the process of production has a negative value in such an alternative of the production process. Because a part of the chromic mud can be utilized, the proposed method also gives a chance for future utilization of old chromic heaps.