Application of hydrolytic precipitation for separation of rare-earth and impurity elements

The growth in the consumption of the rare-earth elements is primarily due to its use in the science-driven indus-tries. The search for additional sources of raw materials requires to study the possibility of a by-product recovery process of rare-earth elements from uranium-containing raw materials. The present research aims at the preparation of productive solutions after the opening of uranium-containing raw materials and extraction of uranium, molybdenum and vanadium from them. The content of the rare-earth elements in these solutions is 50 mg/dm³ - 100 mg/dm³. In addition, there is an increased content of iron and aluminum. Iron has a particularly negative effect on sorption extraction.The method of hydrolytic deposition is proposed to remove Fe, Al. The study of the process kinetics provides to determine the optimal conditions for its conduct. The rare-earth elements can be recovered by sorption or extraction from the purified solutions. Keywords:rare-earth elements, impurity elements,hydrolytic precipitation, sorption