CHEMICAL PROBLEMS

Abstract Naftalan medicinal and fuel oil properties have been studied by methods of IR/UV spectroscopy, DLS, chromato-mass-spectrometry and oil used for curative purposes throughout the year as well. It revealed that two types of Naftalan oil originated not only independently from one another but also from primary organic matter with critical differences, and this can […]

Abstract The ternary compound Cu8SiSe6 was studied by differential scanning calorimetry (DSC). Based on the data of DSC curves for two samples with different masses, the temperature and enthalpy of the phase transition from the low-temperature orthorhombic modification to the high-temperature cubic modification were determined. Using the Gibbs-Helmholtz equation, the entropy of the phase transition […]

Abstract Airports are one of the sources of environmental pollution with runoff water containing emerging contaminants. The process of electrochemical purification of model runoff water containing ethylene glycol and formed during the treatment of aircraft with anti-icing agents was studied. As an anode there was used PbO2 electrode. The structure and morphology of PbO2 electrode […]

Abstract The molecular structure of the new Ni(II) complex of p-nitrobenzoic acid and pyrazine was synthesized and deciphered. It found that the central atom was coordinated by the ligand of p-nitrobenzoic acid according to the monodentate type. Having the basic properties of the pyrazine molecule, it was coordinated by the nickel atom in a donor-acceptor […]

Abstract Iron- and copper-containing oxide catalysts have been synthesized by sol-gel technology with autocombustion using organic reagents – citric acid, glycine, urea as a complexing agent and "fuel"; studied their activity in the oxidation of carbon monoxide to dioxide. The obtained samples were characterized by the methods of X-ray powder diffraction, infrared spectroscopy and electronic […]

Abstract As a result of intrastratal and interlayer flows of produced water of varying intensity, 25% of oil and gas wells are water-encroached in the world. Due to behind casing flow during the operation of oil and gas wells generally reduces the field's development efficiency. In the study, 1-6% (weight) polyethylene polyamine (PEPA) was added […]