Pre-purification from sulphates of the wet-process phosphoric acid obtained from Kola apatite in terms of use in STPP production

by Pawlowska-Kozinska. D., Kijkowska, R., Kowalski, Z.
Source: 1. 6th Conference on environment and mineral processing, part II 1. Ostrava : Vysoká škola báňská - Technická univerzita, 2002 1. 8024800721 1. S. 545-551