Caspian Corrosion Control 2020
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F.G.Valiyev
«OilGasScientifiсResearchProject» Institute, SOCAR, Baku, Azerbaijan
Schiff bases of N1, N4-di (9H-fluoren-9-ylidene) benzene-1,4-diamine (1) and N1,N5- di(9H-fluoren-9-ylidene)naphthalene-1,5-diamine(2) were synthesized by new simple and high yield synthetic procedure. The structures of the synthesized compounds of 1 and 2 were confirmed by elemental, 1H NMR, mass spectroscopic and Single-crystal X-ray analyses. The prepared compounds were evaluated as antibacterial agents against sulfate-reducing bacteria using the serial dilution method, which showed good biocide action. The compounds were tested as corrosion inhibitors against the corrosion of carbon steel in a model of mineralized produced water containing hydrogen sulfide (H2S) and carbon dioxide (CO2) using weight loss methods. The results revealed that these compounds have significant inhibiting effects on the corrosion of carbon steel.
Keywords: Schiff bases; NMR analysis; Corrosion inhibition; Microbial corrosion; Antibacterial activity.
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Kh.I.Hasanov, G.I.Ajalova, C.I.Mirzai, Sh.H.Kasumov
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan;
Azerbaijan Medical University, Baku, Azerbaijan;
Baku State University, Baku, Azerbaijan;
New complex compounds of palladium (II) with biologically active ligand 2 - ethyl - 6 methyl - 3 - hydroxy-pyridine - mexidol in acidic medium (pH = 5,3) of the following composition have been synthesized – 
. In this case, the ligand is protonated and as a single-charged cation occupies an external coordination sphere. The structure of the complex is proved by X-ray structure analysis. It is shown that the structure is constructed of an isolated complex anion – 
and cation 
. The square planar coordination of the palladium atom is formed from three chlorine atoms and the formed tetraacidoanion ligand forms a hydrogen bond. The average length of Pd-Cl bond is 2,3030, there are no deviations from 900 valence angles of Cl-Pd-Cl. The palladium atom is not shifted from the plane coordination polyhedron (square) and therefore trance angles of Cl-Pd-Cl are 1800. Two different lengths -2,289
and 2,713 of hydrogen bonds are related to the geometric location of the ligand functional group.
. In this case, the ligand is protonated and as a single-charged cation occupies an external coordination sphere. The structure of the complex is proved by X-ray structure analysis. It is shown that the structure is constructed of an isolated complex anion – and cation . The square planar coordination of the palladium atom is formed from three chlorine atoms and the formed tetraacidoanion ligand forms a hydrogen bond. The average length of Pd-Cl bond is 2,3030, there are no deviations from 900 valence angles of Cl-Pd-Cl. The palladium atom is not shifted from the plane coordination polyhedron (square) and therefore trance angles of Cl-Pd-Cl are 1800. Two different lengths -2,289 and 2,713 of hydrogen bonds are related to the geometric location of the ligand functional group.The obtained 2-ethyl-6-methyl-3-hydroxypyridinetrachloro - palladium - mexidazole was tested for radioprotective properties. Toxicity of the preparation is LD50 - 240 mg/kg of animal weight. Toxicological studies of mexidazole in mice, rats and dogs did not reveal cardiotoxic, immunotoxic, embryonic, nephrotoxic, hematoxic and other types of side effects. Mexidazole is removed from the body with urine 5-8 hours after intravenous injection.
The carried out biological test showed that the compound, along with radioprotective properties, has some antitumor activity.
Keywords: palladium(II), mexidol, tetraacidoanion, hydrogen bond, coordination, ligand, dentation, X-ray structure - analysis.
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E.F.Sultanov, R.K. Kaziyeva, Z.A.Shabanova, S.B. Aliyeva
«OilGasScientifiсResearchProject» Institute, SOCAR, Baku, Azerbaijan
The reasons for the corrosion of equipment operating in oil and gas condensate wells at the Gunashli oilfield of “May 28” OGPD SOCAR were clarified. It was found that corrosion is caused by aggressive components (H2S, O2, CO2) and microorganisms in the gas and at the same time in the water-condensate mixture. The possibility of using inhibitor bactericides to protect the studied objects from corrosion was studied, and it was shown that the synthesized inhibitors shows a high protective effect in preventing corrosion.
Keywords: Corrosion; Inhibitor; Efficiency; Imidazoline asetat; Fatty acids
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Z.A.Şabanova, S.B.Əliyeva, А.Аbdulayev, İ.Quliyev, V.Şamilov, F.Q.Vəliyev
SOCAR, Bakı, Azərbaycan 1«OilGasScientifiсResearchProject» Institute, SOCAR, Baku, Azerbaijan
SOCAR, Baku, Azerbaijan
The reasons for the corrosiveness of cement slurries under hydrogen sulfide aggression used in cementing casing and production strings are investigated. An inhibitory composition against the aggressiveness of cement slurries was developed. By the method of gravimetric testing in laboratory conditions in the temperature range of 70-1000C have been investigated the inhibitory properties of the developed inhibitor. Tests have shown that a synthesized corrosion inhibitor can effectively control carbon steel corrosion under the studied conditions.
Keywords: Corrosion, Inhibitor, Cement slurry, Casing strings; Production strings .
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A.D.Aga-zade, Kh.I.Hasanov, A.M.Samadov, M.E.Alsafarova, O.D.Aga-zade
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
Studies have been conducted on the production of ammonium salts with lower representatives of organic acids, such as propane, butane and pentane. They were used as an additive to the original demulsifier in order to increase the demulsifying ability. It was found that the composite compositions made up of the original demulsifier, which contains within 50-60% by weight of a non-ionic surfactant (NPA) and 50-40% by weight of a solvent, additionally containing 5% by weight. diethylamine complex salts of propane, butane and pentane acids exhibit high demulsifying activity and contribute to deep dehydration of both low-viscosity and high-viscosity oils. Higher demulsification activity was observed in compositions where the active component-NPA is 55% by weight.
Keywords: demulsifier, organic acids, diethylamine complex, demulsifying activity, water-oil emulsion, oil.
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S.B.Aliyeva
«OilGasScientificResearchProject» Institute, SOCAR, Baku, Azerbaijan
On the basis of industrial aluminates solution and silica gel have been synthesized zeolites of phillipsite, analcime and erionite. By the method of X-Ray phase andX-Ray spectral analysis have been investigated the phase and chemical composition of the initial reaction masses, intermediate and final crystallization products. It has been studied the influence of the alkalinity of the reaction mass to the crystallization of zeolites.
Key words: zeolite, phillipsite, analcime, erionite, aluminate solution, hydrothermal crystallization
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A.I.Kerimov
Institut of Catalysis and Inorganical Chemistry named after M.F.Nagiyev NAS of Azerbaijan, Baku, Azerbaijan
In the temperature range 280-390°C, at different ratios of methylcyclohexane:oxygen:nitrogen, space velocity of the gas mixture 1000-3000 h-1 and at atmospheric pressure it has been investigated the catalytic properties of synthetic and natural zeolites modified with various cations of transition and non-transition elements in the vapor-phase reaction of oxidative dehydrogenation of methylcyclohexane to methylcyclohexadiene-1,3. It has been found that the natural clinoptilolite with a combination of cations Co2+; Cr3+ in amounts of 0,5; and 0,25% wt., respectively, is an active catalyst for the oxidative dehydrogenation of methylcyclohexane to metylcyclohexadiene-1,3.
Keywords: oxidative dehydrogenation, zeolites, methylcyclohexane, methylcyclohexadiene-1,3.
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The 2020 issue of Caspian Corrosion Control journal can be downloaded from here.
