METHOD OF PRODUCING A COMPOSITE BASED ON MICROPOROUS ZEOLITE AND SILICON CARBIDE Russian patent published in 2020 - IPC C01B39/04 C01B39/38 C01B33/26 B01J29/40 B01J29/89 B01J29/70 B01J20/32 B01J20/18 B01J27/224 B01J35/04 B01J35/10 

FIELD: technological processes.

SUBSTANCE: invention relates to the technology of producing compounds with molecular sieve properties with cation-exchange properties – micro-meso-macroporous materials, containing in its structure crystalline phases of microporous zeolite, in particular structure MFI, and meso-macroporous silicon carbide. Method involves preparation of a mixture consisting of tetraethyl orthosilicate, water, tetrapropylammonium hydroxide, aluminum isopropoxide and silicon carbide in molar ratio tetraethyl orthosilicate : water : tetrapropylammonium hydroxide : aluminum isopropoxide : silicon carbide, respectively equal to 1:35–39:0.11–0.16:0.013–0.015:0.5–0.7. Obtained suspension undergoes crystallisation under the effect of microwave radiation at temperature of 190–200 °C for 180–210 minutes to form a crystallisation product. Precipitate is then separated from the crystallisation product and washed, dried and calcined to produce the end product.

EFFECT: technical result consists in ensuring production of composite directly in hydrogen form with simultaneous elimination of presence in said composite of sodium ions, as well as avoiding use of seed crystals during synthesis.

1 cl, 1 dwg, 1 ex