Unique kind of natural resources of Siberia is the hydromineral raw materials. Natural polycomponent brines are one important type of the hydromineral raw materials. Prospects for the integrated use of the hydromineral resources in Russia remain low. This is caused by the absence of efficient and environmentally friendly processing technologies. The necessity of resolving these problems relates to the perspectives of developing a source of raw materials in Russia for extracting strategic rare metals (Li, Sr, Rb, Cs, etc.) from unconventional sources of mineral raw materials. The natural polycomponent brines have a higher absolute content of these elements than the minimum industrial standards (MIS): by 20-25 times on lithium, by 5-10 times on rubidium, by 3 times on cesium, by 10 times on strontium. On the basis of theoretical studies and pilot researches revealed conditions of the selective extraction of strontium, lithium and rubidium from highly concentrated natural brines during the ion exchange. Technological schemes were developed to extraction of metals from brines and various compositions of quarry waters of iron-ore and diamond deposits in Siberia.
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