Based on thermodynamic calculations of possible reactions of interaction between sodium tungstate and oxygen-containing compounds of boron, carbon, phosphor, sulphur, metals of VI-B group the probability of possible reactions was evaluated. The experimental verification of the assumptions was accomplished by the methods of potentiometry and IR-spectroscopy. The possibility of existence of equilibrium (reversible) melted systems with the electrodes from metals of VI-B group and their carbides was proved by the electrochemical measurements and thermodynamic calculations.

A range of potentials in which the cobalt-tungsten alloy phase is selectively dissolved in the solutions of phosphoric acid to form soluble compounds of these metals while the tungsten carbide phase remains in the precipitate is determined. It is shown that tungsten ores and concentrates are decomposed at temperatures of 1050 to 1100°C in sodium chloride-sodium metasilicate melts to form two immiscible phases: halide-tungstate, which contains 96 to 99 %, and silicate, which contains 90 % of the ore components.

In the article were analyzed the prospects of cooperation between Ukraine and EU structural funds. There was studied the current state of interaction between Ukraine and EIB and EBRD, offered the directions of its optimization. It was proved, that the base of increase of effectiveness of the use of investment resources of European financial organizations by Ukraine and approach of prospects of widening of the credit projects spectrum is not only the clear regulation of the national strategy of economic development but also the improvement of the system of monitoring of the use of investment resources.