CHEMICAL PROBLEMS

Abstract The phase equilibria in the FeS-FeGa2S4-FeGaInS4 system were studied using the differential thermal and X-ray diffraction phase analysis. The projection of the liquidus surface and the isothermal sections of the phase diagram at 1200 and 900 K were constructed. It revealed that it belongs to quasi- ternary systems with monovariant eutectic and peritectoid equilibria. […]

Abstract Considering the inconsistency of the available literature data on phase equilibria in the SnSe – Sb2Se3 system, the issue was re-examined by differential thermal analysis and X-ray diffraction technique. A new, refined version of the phase diagram was constructed. It was found that the ternary compound Sn2Sb2Se5 and the intermediate  -phase with a […]

Abstract The oxidative conversion of methanol into formaldehyde and dimethoxymethane was studied in the presence of catalysts based on Zr alloys with V, Mo, Fe. The influence of the reaction temperature, contact time, alcohol, air ratio and pressure on the output of formaldehyde and dimethoxymethane was evaluated. The XRD and XPS analyses were performed to […]

Abstract In a disk – shaped two-section granulator with coaxial sides, the preparation of granules from clay powder by the action of drops from binder fluid of the same diameter was studied. Optimal granulation time in the first and second sections, the corner of inclination and the rotation speed of the granulator are established, which […]

Abstract The epoxidation reaction of various vegetable oils (soybean, sunflower, corn, cottonseed, palm, etc.) was carried out using super formic acid as an oxidizing agent, which was formed in situ by the interaction of formic acid with hydrogen peroxide. As a result of palm oil epoxidation, the formic acid/hydrogen peroxide system, at a molar ratio […]