Caspian Corrosion Control 2021
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F.S.Ismailov
«OilGasScientifiсResearchProject» Institute, SOCAR, Baku, Azerbaijan
Corrosion is one of the most pressing problems in the oil industry today. An effective method for assessing the corrosion state of equipment is corrosion monitoring - a system for observing and predicting the corrosion state of an object in order to obtain timely information about its possible corrosion failures. The article provides an overview of modern advanced technologies for corrosion monitoring of oilfield equipment and subsea pipelines.
Keywords: corrosion; monitoring; fiber optic system.
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F.G.Valiyev
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
A new polynuclear heterocyclic compound, 14H-1,7,8,14a-Tetraaza-benzo [α] tetracene-14-ol, was synthesized for the first time by intramolecular cyclization in an acidic medium of compounds containing an aldehyde group in one of the aromatic nuclei bound by the NH group and the N atom in a different. The composition and structure of the obtained substances were confirmed by the data of elemental analysis, H1 NMR, EI-mass spectroscopy and X-ray structural analysis of single crystals. The bactericidal action of the synthesized pyrimidine derivative against microbiological corrosion was studied. At the optimum concentration of the reagent, the bactericidal effect of 98-99% was determined against aggressive sulfate-reducing bacteria.
Keywords: Polynuclear heterocyclic compounds; NMR; Sulfate-reducing bacteria; Corrosion; Inhibitor-bactericide
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Kh.I.Gasanov, G.I.Ajalova, Sh.H.Gasimov
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan;
Azerbaijan Medical University, Baku, Azerbaijan
The obtaining and investigation of various complex compounds of the biologically active aromatic heterocyclic ligands with platinum and palladium are of interest due to their potential medical applications. To that end, 4-amino pyridine containing cyclic and exocyclic nitrogen atoms has been used. The main aim of this work is to clarify which nitrogen atom of the ligand composes stronger and more stable bond. As a result of IR-spectroscopic investigation of synthesized complexes, the acquired information demonstrated that the pyridine nitrogen atom of the ligand is protonated and composes outer sphere as monocharged cation. However, tetraacidoanion is formed in the inner sphere. In the alkaline medium the ligand is monodentately coordinated with palladium through nitrogen atom of pyridine. The exocyclic nitrogen atom of the ligand does not participate in the coordination regardless of pH of the medium and stoichiometric ratio of the taken compounds The initial biological probes were accomplished and the correlation between their biological activities, composition and structures of complexes were determined.
Keywords: palladium; bidentate ligand; 4-aminopyridine; nitrogen atom of pyridine; biological activity.
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Z.A.Shabanova
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
The catalytic properties of modified synthetic (A, X, Y) and natural (MOR, Сlp) zeolites have been studied in the reactions of oxidative dehydrogenation of butyl alcohols to corresponding carbonyl compounds. It has been established that bimetallic zeolite catalysts show higher activity in these reactions. It has been developed theoretically based general kinetic model of processes. The numerical values of the constant models calculated.
Keywords: oxidative dehydrogenation; butyl alcohol; kinetics; mechanism.
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S.B.Aliyeva, G.M.Aliyeva
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan;
Institute of Catalysis and Inorganic Chemistry NAS Azerbaijan
The new version of practical realization of zeolite 'm' from the mixture of metakaoline and obsidian has been given. Formation of initial samples-tablets was proceeded by the dry pressing. The synthesis was realized by hydrothermal crystallization in Na2O-Al2O3-SiO2-H2O system at 150 oC. The samples were crystallized in NaOH medium. The study of kinetics and elucidation of mechanism of zeolite 'm' crystallization has been carried out. Phase and chemical composition of crystallization products have been determined by the methods of X-Ray phase, thermographic and X Ray - spectral.
Keywords: zeolite «m»; hypothetical structure; hydrothermal synthesis; kinetics.
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Sh.Z.Tapdigov
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
Metal gel complexes of Cu (II), Co (II) and Ni (II) ions of hydrogels obtained by construction of poly-N-vinylpyrrolidone (PVPr) with N, N-methylene bisacrylamide (MBAA) with average molecular weight of 10 kDa and 40 kDa were synthesized. The capacity of the obtained biologically important complexes for metal ions was determined to be 3.3-3.6 mg/g. Immobilization of trypsin in polymer-metal complexes was carried out, and for thrips of metal gel complexes, the capacity was increased by 7-8 times, the degree of immobilization by 2 times, and the specific activity of the enzyme from 38 to 92 ED/mg. It was found that triple polymer-metal-trypsin systems have greater communication resistance than polymer-trypsin binary systems, which is due to the binding of trypsin to the polymer network by metal ions. In addition, the structure of the obtained complexes was identified by IR-Fourier and UV spectroscopic methods.
Key words: poly-n-vinylpyrrolidone; biocomplex; trypsin; immobilization.
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The 2021 issue of Caspian Corrosion Control journal can be downloaded from here.
