Synthesis and Study of Faujasite Zeolite Based on Nakhchivan Native Mineral
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SYNTHESIS AND STUDY OF FAUJASITE ZEOLITE BASED ON NAKHCHIVAN NATIVE MINERAL G. A. Mamedova1 Translated from Steklo i Keramika, No. 1, pp. 17 – 20, January, 2020.
Faujasite zeolite was synthesized on the basis of the native zeolite of Nakhchivan, and its physicochemical properties were studied. The zeolitic tuffs of Nakhchivan (Kyukyuchaiskoe field) served as the native sample. It was determined that faujasite exists under a wide range of conditions; the optimal conditions of its hydrothermal synthesis were found to be temperature 100 – 200°C, thermal solution concentration 10 – 15% Ca(OH)2, and process time 50 h. Key words: mineral of Nakhchivan, zeolite, faujasite, native mineral, hydrothermal synthesis.
Native zeolite from the Kyukyuchaiskoe field in the Nakhchivan Autonomous Republic was used as a base for synthesizing under hydrothermal conditions a series of zeolites in the form of pure phases as well as associations [12 – 14]. It was determined that by using the local native raw material from the Kyukyuchaiskoe field it becomes possible to conduct the process under modern conditions and to obtain phase-pure products of crystallization. The purpose of the present research is to study the hydrothermal modification of the native minerals of the Nakhchivan field with the production of the requisite gismondine zeolite and to determine the optimal conditions of its synthesis using local natural raw material from the Kyukyuchaiskoe field in Nakhchivan Autonomous Republic.
The study of the structure and properties of framed aluminum silicate minerals, obtained from accessible and widely available natural material, is an important scientific problem directed at the development of new multifunctional materials. This is due primarily to the uniqueness of the physicochemical properties of framed aluminum silicates, manifested in the extended specific surface area, the presence of active centers of different nature, and adsorption and ion-exchange capacities. This opens up extensive possibilities for their use, for example, in the development of new effective materials for sewage purification [1 – 3] and ion-exchangers [4 – 7]. The path for the development of next-generation catalysts goes through the production of synthetic zeolites. Catalysts based on zeolites can be used for practically any chemical process [8 – 11]. Questions concerning their use in industry are based on the technological and economic particulars of the process. The use of local mineral raw material (inexpensive materials) in the synthesis of zeolites is becoming of great interest and plays an active role in technological advancement associated with the scientific research on and production technologies for zeolitic materials under optimized experimental conditions. The need for research on the hydrothermal recrystallization of zeolite containing rock of Nakhchivan is associated with the possibility of using this rock to obtain zeolites of other structural types with properties of practical importance. 1
EXPERIMENTAL PART A
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