SYNTHETIC ZEOLITE CONTAINING CATALYTIC METAL Russian patent published in 2021 - IPC B01J29/52 B01J29/54 B01J29/56 B01J29/58 B01J29/72 B01J29/74 B01J29/76 B01J29/78 B01J29/85 B01J29/86 C01B39/48 

FIELD: chemical or physical processes.

SUBSTANCE: invention relates to synthetic zeolite, methods for production thereof, to use thereof as a catalyst and a sorbent, as well as to a method of converting a raw material containing an organic compound. Synthetic zeolite having a CHA or AFX-type carcass structure, selected from a group consisting of silicates, aluminosilicates and borosilicates, has a degree of crystallinity of at least 80 %, and contains from 0.01 to 5 wt% of at least one catalytic metal selected from a group consisting of Ru, Rh, Pd, Ag, Os, Ir, Pt, Au, Re, and combinations thereof, in terms of weight zeolite, where not less than 80 % of catalytic metal is encapsulated in zeolite in form of particles of non-framed metal, where if zeolite is aluminosilicate, then it has molar ratio SiO₂: Al₂O₃, which is more than 10:1. Synthetic zeolite synthesis method involves: a) preparing a reaction mixture containing a synthesis mixture which enables to form a frame structure of a synthetic zeolite, and at least one catalyst metal precursor, wherein catalytic metal precursor includes metal complexes stabilized with ligands L, selected from a group comprising atom-containing N ligands, containing atom O ligands, containing S atom ligands and containing atom P ligands, or a) preparation of a reaction mixture containing a synthesis mixture, providing formation of a frame structure of synthetic zeolite, at least one fixing reagent and at least one catalytic metal precursor, where fixing reagent contains at least one amino group and/or thiol group and at least one alkoxysilane group and catalytic metal precursor includes at least one ligand, which can be replaced by at least one amino group and/or thiol group contained in fixing reagent, b) heating said reaction mixture under crystallisation conditions to obtain crystals of said synthetic zeolite and c) removing from said reaction mixture synthetic zeolite, in which synthesis mixture providing formation of frame structure of synthetic zeolite contains a source of organic guide reagent for formation of structure.

EFFECT: disclosed invention demonstrates successful encapsulation of metal inside zeolite crystals; fine nanoparticles of catalytic metal located inside the zeolite structure remain stable and do not sinter to form larger particles after additional thermal (or redox) treatment.

18 cl, 16 dwg, 1 tbl, 13 ex