Abstract
The faujasite and chabazite zeolites with 100% crystallinity and phase purity of potential practical importance was first obtained based on the mineral raw materials of the Nakhchivan Kyukyuchai deposit where zeolite content varied in the range of 75–80%, by hydrothermal treatment. Hydrothermal synthesis was carried out in the temperature range from 90 to 300°С, the concentration range of the KOH + NaOH thermal solution from 10 to 35% and KCl + NaCl mineralizer of 3–20%, reaction time of 10–100 hours. Areas of existence of chabazite and faujasite with a 100% degree of crystallinity and phase purity were established: KOH + NaOH concentration of 15–20%, KCl + NaCl concentration of 10–15%, temperature at 230°С, processing time of 100 hours, and KOH + NaOH concentration of 20–30%, concentration of KCl + NaCl of 5–10%, temperature at 250°С, processing time of 50 hours, respectively. The formation of these zeolites was confirmed by X-ray phase analysis. The influence of temperature, the concentration of thermal solution and mineralizer, time of synthesis on the crystallization process was studied, and it was shown that a change in the above regions of existence of these zeolites contributes to the production of these zeolites in association with other zeolites and hydrosodalite.
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Mamedova, G.A. Effect of Synthesis Conditions on the Crystallization Process of Faujasite and Chabazite on the basis of Nakhchivan Zeolitic Tuff. Theor Found Chem Eng 56, 783–790 (2022). https://doi.org/10.1134/S0040579522050281
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DOI: https://doi.org/10.1134/S0040579522050281