CHA TYPE ZEOLITIC MATERIALS AND METHODS FOR THEIR PREPARATION USING COMBINATIONS OF CYCLOALKYL- AND TETRAALKYLAMMONIUM COMPOUNDS Russian patent published in 2019 - IPC C01B39/48 B01J29/72 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for the preparation of zeolites. Method for the preparation of a zeolitic material having a CHA-type framework structure comprising the steps of: (1) providing a mixture comprising one or more sources for SiO₂, one or more sources for Al₂O₃, one or more tetramethylammonium compounds and one or more N,N,N-trimethyl-cyclohexylammonium compounds as structure-directing agent; (2) crystallizing the mixture obtained in stage (1) for obtaining a zeolitic material having a CHA-type framework structure. According to the method, the molar ratio of tetramethylammonium compounds and N,N,N-trimethyl-cyclohexylammonium compounds in the mixture ranges from 0.45 to 0.65.

EFFECT: invention provides for the preparation of a CHA-type zeolite with increased catalytic activity in exhaust gas cleaning processes.

13 cl, 1 tbl, 8 dwg, 3 ex