PRODUCTION OF AN ALUMINOSILICATE AEI ZEOLITE Russian patent published in 2021 - IPC C01B39/48 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for producing a molecular sieve with an AEI framework. The method for producing a zeolite includes formation a reaction mixture containing one or more sources of silica, one or more sources of alumina, a base and one or more organic structure-directing agents (SDAs) wherein at least part of the source of alumina is a zeolite of the FAU topological type and wherein the reaction mixture comprises less than 600 moles of water per mole of alumina, and interaction of the reaction mixture at a temperature of approximately 75 to approximately 220°C for 0.1 to 20 days to form zeolite crystals with an AEI framework and a silica to alumina ratio (SAR) from approximately 10 to approximately 30, wherein the relative yield based on the ratio of the AEI mass to the reaction mixture mass is approximately ≥ 5% and wherein the components of the reaction mixture are present in specified ratios where the end points are included in the ranges: SiO₂Al₂O₃ - 10 to 100, OH^-/SiO₂ - 0.2 to 0.9, SDA/SiO₂ - 0.01 to 0.2, alkali metal cation/SiO₂ - 0.20 to 1.0, H₂O/SiO₂ - 4 to 60.

EFFECT: technical result of the invention is increased AEI yield relative to the reaction mixture mass ("AEI yield") and increased relative yield of SDA used during synthesis of the AEI zeolite.

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