Use of Mechanochemical Activation and Ultrasonic Treatment for the Synthesis of LTA Zeolite
| Autor: | N. E. Gordina, S. P. Kochetkov, V. Yu. Prokof’ev |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Sodium aluminate
Chemistry 020502 materials Sodium chemistry.chemical_element 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Hydrothermal circulation law.invention chemistry.chemical_compound 0205 materials engineering Chemical engineering Aluminosilicate law Sodium hydroxide Crystallization 0210 nano-technology Zeolite Metakaolin |
| Zdroj: | Russian Journal of General Chemistry. 88:1981-1989 |
| ISSN: | 1608-3350 1070-3632 |
| Popis: | The processes of LTA zeolite synthesis from mixtures of metakaolin and solid sodium hydroxide with an overstoichiometric quantity of alumina (molar composition of the mixture Al2O3·2SiO2: NaOH: Al2O3 = 6: 12: 2) were examined in relation to the treatment method used in the first step (mechanochemical activation or ultrasonic treatment). Formation of cubic sodium aluminate in the first step was established in both cases. Subsequent heat treatment in the case of mechanical activation resulted in the synthesis of the LTA zeolite, and in the case of ultrasonic treatment, in the synthesis of sodium aluminosilicates. After final hydrothermal crystallization the LTA zeolite quantity exceeded 95 wt %. The zeolite phase morphology was shown to depend on the treatment method used in the first step of the synthesis. |
| Databáze: | OpenAIRE |
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