Mammadova Ay.
Doctor of Philosophy, Azerbaijan State Oil and Industry University
Ahmadzada Z.
Master Degree Student, Azerbaijan State Oil and Industry University

Abstract
Catalytic properties of ZSM-5 zeolite-based catalysts modified with cerium, magnesium, and yttrium were studied in a flow-through installation at atmospheric pressure in the temperature range of 350-500 °C. It is established that the nature of the modifier significantly affects the output and selectivity of the formation of ethylbenzene. Modification of HZSM-5 with modifiers reduces the yield of by-products and increases the yield and selectivity for ethylbenzene. The maximum yield and selectivity for ethylbenzene is achieved on the catalyst 4% Ce-HZSM-5, which is 38.3% and 58.8%, respectively.

 Keywords: Alkylation, benzene, ethanol, ethylbenzene, HZSM-5, modification, selectivity.

Aliyev I.
Doctor of Chemistry, prof. hands. lab.
Rahimova V.
Ph.D., Associate Prof.,
Ismailova S.
Researcher.
Huseynova Sh.
Ph.D. chemical sciences
Institute of Catalysis and Inorganic Chemistry named after M.F.Nagiyev,
Ministry of Science and Education of the Republic of Azerbaijan
Iskendarova G.
Ph.D. chemical sciences
Institute of Physics, Ministry of Science and
Education of the Republic of Azerbaijan

Abstract
The phase equilibrium in the Cu₃As₄Te₉-CrAsTe₃ system was studied by methods of physicochemical analysis: differential thermal analysis (DTA), X-ray diffraction analysis (XRD), microstructural analysis (MSA), determination of density and microhardness, and a T-x phase diagram of the system was constructed. As a result, it was established that the phase diagram of the Cu₃As₄Te₉-CrAsTe₃ system is a non-quasi-binary section of the quasi-ternary Cr₂Te₃-As₂Te₃-CuTe system. In the system at room temperature, solid solutions based on the Cu₃As₄Te₉ compound extends to 5 mol % CrAsTe₃. The peritectic compound CrAsTe₃ decomposes as follows: CrAsTe↔M+Cr₂Te₃.

 Keywords: system, phase equilibrium, non-quasi-binary, diagram, density.

Aliyev I.
Doctor of Chemistry, prof. hands. lab.
Suleymanova M.
Researcher.
Institute of Catalysis and Inorganic Chemistry named after M.F.Nagiyev
Ministries Science and Education, Republic of Azerbaijan
Ahmedova C.
Ph.D., Associate Prof.,
Adiyaman University, Faculty of Искусствоведение and Sciences, Faculty of Chemistry, Turkey
Aliyev I.
Master.
Azerbaijan State University of Oil and Industry

Abstract
The TlS-CuCr₂Te₄ system was studied and its T-x phase diagram was constructed using complex methods of physical and chemical analysis: differential thermal analysis (DTA), X-ray diffraction analysis (XRD), microstructural analysis (MSA), as well as determination of density and microhardness. It has been established that the phase diagram of the system is partially quasi-binary. Eutectic equilibrium and peritectic transformation occur in the system. In the system at room temperature, solid solutions based on the CuCr₂Te₄ compound reach 10 mol % TlS, and solid solutions based on TlS are practically not established.

Keywords: system, phase, solid solution, quasi-binary, eutectic.

Abbasov V.
academic
Hasanov E.
PhD
Ağakishiyev R.
senior engineering technologist, PhD student
 Nabiyev E.
PhD student
Kangarli A.
PhD student
Alizada R.
scientist
Aliyev.T.
specialist
Ministry of Science and Education Institute of Petrochemical Processes named after Y.H. Mammadaliyev, Baku Azerbaijan

Abstract
The conducted studies show that the high corrosion protection effect of the conservation liquids made on the basis of these compositions is explained by the strong chemisorption relationship with good physical adsorption of the compound to the metal surface due to the unused electron pair or partial protonation of the nitrogen atom in the nitrogen atoms in the inhibitor molecule. Basically, these conservation liquids create a protective layer on the surface of the metal, which prevents water vapor from entering the surface of the metal.

Keywords: corrosion, oleic acid, amidoamine

Javadova A.
Dr.of Technical Sciences,professor, head of «Laboratory of  Additives Composition»
Yusifova A.
Ph.D. of technical sciences, leading researcher of «Laboratory of Additives Composition»
Yusifzadeh G.
Scientist of «Laboratory of  Additives Composition»
Dadashova T.
Scientist of «Laboratory of  Additives Composition»
Maharramova Z.
Scientist of «Laboratory of  Additives Composition»

Abstract
The widespread use of M-20B₂f motor oil used in ship makes the development of this modern analogue important and urgent. For this purpose, calcium salts of condensation products of alkylphenols with high alkaline number with formaldehyde and various amines, based on the replacement of detergent-dispersant VNII NP-360 and -354 additives used in the lubricating composition of the said oils were studied. By studying the detergent-dispersant and at the same time anti-oxidation properties of alkylphenolate additives at different temperatures and times, based on the amount of sediment formed during the oxidation process, low molecular volatile acids and acid number results, the use of AKI-114 and AKI-150 additives was preferred as high-performance detergent-dispersant additives in lubricating compositions of and M-20B₂f motor oils.

Keywords: motor oil, additive, ship and drilling equipment, alkylphenol, detergent-dispersing property, oxidation, alkaline number.

Aliyev I.
Doctor of Chemistry, prof., head. lab.

Magammadragimova R.
Scientific collaborator
Institute of Catalysis and Inorganic Chemistry named after M. F. Nagiyev
of the Ministry Science and Education of the Azerbaijan Republic.

Ahmedova C.
Ph.D., associate professor.
Adiyaman University, Faculty Arts and Sciences
Department of Chemistry, Türkiye.

Abstract
To clarify the nature of the chemical interaction between InAs₂S₂Se₂ and In₃As₂S₃Se₃, alloys of various compositions were synthesized. The chemical interaction in the InAs₂S₂Se₂-In₃As₂S₃Se₃ system was studied using complex methods of physicochemical analysis: differential thermal analysis (DTA), X-ray diffraction analysis (XRD), microstructural analysis (MSA), as well as determination of density and microhardness, and a Tx phase diagram was constructed. It has been established that the state diagram of the InAs₂S₂Se₂-In₃As₂S₃Se₃ system is quasi-binary, of the eutectic type. In the system at room temperature, solid solutions based on InAs₂S₂Se₂ reach up to 3 mol %, and based on In₃As₂S₃Se₃ up to 10 mol %. The compounds InAs₂S₂Se₂ and In₃As₂S₃Se₃ form a eutectic with a composition of 25 mol % In₃As₂S₃Se₃, temperature 265°C.

Keywords: phase, systems, semiconductor, microhardness, density

Perelygin Yu.
Doctor of Engineering Sciences, Professor, Department of Chemistry, Penza State University, Russia, Penza

Kolchugina I.
PhD of Engineering Sciences, Associate Professor, Department of Chemistry, Penza State University, Russia, Penza

Abstract
The relevance and goals are due to the need to obtain an equation of the dependence of the equivalent electrical conductivity on the salt concentration in the solution. An equation is proposed for calculating the equivalent electrical conductivity depending on the salt concentration in the solution. The resulting equation is sufficiently well observed when the salt concentration in the solution is up to 5 g-eq/l.

 Keywords: electrical conductivity of solutions, salt concentrations.

Allazova N.
Ph.D., senior researcher,

Aliyev I.
Doctor of Chemistry, prof., head. lab.
Institute of Catalysis and Inorganic Chemistry
named after M.F.Nagiyev of Ministry of Sciences
and Education, Baku, Azerbaijan

Ahmedova C.
Ph., associate professor.
Adiyaman University, Faculty of Arts and Sciences,

Department of Chemistry,, Turkey

Musayeva N.
Doctor of Philosophy in Phys. and Mathematics Sci., associate Prof.,

Iskenderova G.
Ph.D., senior researcher,
Intitute of Fiziki of Ministry of Sciences
and Education, Baku, Azerbaijan

Abstract
To clarify the nature of the chemical interaction in the Bi₂S₃-Cu₂Cr₄Te₇ system, physicochemical methods were carried out: differential thermal analysis (DTA), X-ray phase analysis (XRD), microstructural analysis (MSA), as well as determination of density and microhardness and a T-x phase diagram was constructed . The phase diagram of the system belongs to the quasi-binary eutectic type. The results of microstructure analysis show that the system contains homogeneous regions based on the initial components. It has been established that at room temperature in the Bi₂S₃-based system the content of solid solutions reaches 3 mol % Cu₂Cr₄Te₇, and based on the Cu₂Cr₄Te₇ compound, 15 mol % Bi₂S₃.

Keywords: system, solid solutions, eutectic, density, phase.