The hydrogen-donor abilities of polymers and the activity of catalysts in the process of thermal destruction of the organic mass of primary coal tar (PCT) are studied by non-isothermal kinetics methods. PCT,magnetic microspheres, nickel-deposited chrysotilechrysotile and Fe3O4nanocatalysts were used as initial raw materials. Рolymers such as polyethylene (PE), polystyrene(PS) and polyethylene glycol (PEG) were selected as a hy-drogen donor. The phases Mg3[OH]4{Si2O5} and NiO were determined by X-ray phase analysis (XRD) in the obtained catalyst (nickel-deposited chrysotile), and the presence of highly dispersed nickel oxide particles on the surface and inside the nanotubes was shown by the transmission electron microscope (TEM). Nickel oxide particles of 8–11 nmand 30–37 nmwere evenly distributed on the surface and inside the chrysotile nanotubes. The kinetic parameters of the thermal destruction of a mixture of PCT, catalyst and polymer material were determined on the basis of thermogravimetric analysis using the integral method and the method for determin-ing the thermokinetic parameters by the inflection point on the thermogravimetric curve(TG). The change in the activation energy, rate constant and pre-exponential factor with an increase in the degree of destruction of the organic mass of the PCT is established. It was shown that the nature of polymers and catalysts significantly affects the value of the rate constant and the activation energy. The calculated activation energies of the thermal destruction of a mixture of coal tar with PS and PE in the presence of a catalyst (nickel-deposited chrysotile) by the first method are 47.6 kJ/mol and 40.4 kJ/mol, and by the second method are 47.3 kJ/mol and 86.5kJ/mol respectively.

Использование оксида хрома (VI) в качестве сорбента мышьяка из кислых медьсодержащих растворов В статье представлены результаты экспериментов очистки медного электролита от мышьяка оксидом хрома (VI) с использованием вероятностно-детерминированного планирования на четырех уровнях. Помимо этого была произведена математическая обработка результатов и рассчитаны коэффициенты корреляции и их значимости для частных зависимостей степеней осаждения мышьяка. Приведены графические зависимости степени осаждения мышьяка от исследуемых факторов, выведено обобщённое уравнение Протодьяконова. Определены оптимальные условия проведения процесса осаждения мышьяка оксидом хрома (VI). Кратность дозировки осадителя 4; отношение осадителя к мышьяку 2,5:1; температура проведения процесса 25 ºС; концентрация серной кислоты в электролите 200 г/л; время проведения процесса осаждения 15 мин. Показано, что оксид хрома (VI) удаляет мышьяк из медного электролита на 54,25 % при начальной концентрации 9,83 г/л. Ключевые слова: мышьяк, оксид хрома (VI), сорбент, медь, электролит, вероятностно-детерминированное планирование эксперимента, степень осаждения мышьяка.

Материалы VII Международного Беремжановского съезда по химии и химической технологии 32 ағызынды су құрамындағы органикалық қосылыстардың құрылысын бұзуға болатындығы көрсетілген жəне түйіршікті электродтарды практикада қолдануға болатындығы келтірілген. USE THE LUMPY ELECTRODES FOR SEWAGE CLEAR FROM ORGANIC COMPOUNDS

Abstract-A thermodynamic analysis of Mn-As-H 2 O, Mn-Sb-H 2 O, Mn-Bi-H 2 O systems was made through calculation and drawing diagrams of E-pH, where the boundaries of the area of sustainability and formation of arsenates, antimonates and bismuthates of manganese are clearly shown.

The method of using of concentration plants tailings is proposed for the first time in this study. These tailings contain a number of valuable metals, such as Cu, Fe, Zn, etc. and are a potential raw material for obtaining concentrates of some elements. An electrohydropulse discharge is used to intensify the process of leaching of copper and other metals. Ammonium bifluoride, the most effective of the ammonium salts used in the copper leaching by the ammonization method, was chosen as a reagent. The influence of significant leaching parameters is studied and optimized using probabilistic deterministic planning of experiment. Based on the study findings, the following process conditions were found to be optimal: the mass ratio of S : L (solid : liquid) = 1 : 1; Cu : F = 1 : 6; sulfuric acid concentration - 40 g/l; the experiment duration - 30 min; discharge voltage - 10 kV and the leaching efficiency can be achieved 80-85 %. Comparative features of tailings samples from the Karagaily concentration plant (Republic of Kazakhstan) were studied using X-ray diffraction (XRD), scanning electron microscope (SEM), atomic emission spectral analysis. It was found that the copper minerals contained in the tailings are completely shattered and the copper is maximally transferred to the aqueous phase.