Synthesis of Levynite Zeolite and Investigation the Influence of Various Factors on the Crystallization Process in Natural Halloysite--Dolomite--Obsidian System

Abstract

The article presents the synthesis of a phase-pure lev levynite-type zeolite with 100 % crystallinity based on the mineral resources of the Nakhchivan Autonomous Republic. The influence of temperature, alkaline activator concentration, and hydrothermal treatment duration on the crystallization rate and selectivity of levynite-type zeolite formation was studied. It was shown that hydrothermal treatment was studied in the temperature range of 100--300 °C, in a solution NaOH with a concentration of 10--35 % for 50--150 h. The optimal crystallization parameters ensuring 100 % crystallinity and phase purity of levynite were established: temperature of 200 °C, concentration NaOH of 20--30 %, and treatment time of 100 hours. The starting components and products were subjected to a comprehensive study using X-ray phase analysis, IR spectral analysis, derivatographic analysis, elemental analysis, and scanning electron microscopy. The data obtained showed that deviations from optimal synthesis parameters lead to a decrease in process selectivity and the formation of side phases. These studies are consistent with modern trends in the development of green technologies and sustainable environmental management, create a scientific basis for further research, improve the development of new systems in zeolite synthesis, and facilitate the discovery of new ways to create cheaper and more efficient catalysts and adsorbents

Please cite this article in English as:

Abbasov A.D., Mamedova G.A., Mammadova F.S. Synthesis of levynite zeolite and investigation the influence of various factors on the crystallization process in natural halloysite--dolomite--obsidian system. Herald of the Bauman Moscow State Technical University, Series Natural Sciences, 2026, no. 4 (127), pp. 58--73 (in Russ.). EDN: RBHDSY

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