| abstract |
The present invention relates to a continuous process for preparing a zeolitic material having a CHA-type framework structure comprising SiO2 and X2O3, said process comprising (i) preparing a mixture comprising one or more sources of SiO2, one or more sources of X2O3, seed crystals, one or more tetraalkylammonium cation R5R6R7R8N+-containing corn- pounds as structure directing agent, and a liquid solvent system; (ii) continuously feeding the mixture prepared in (i) into a continuous flow reactor at a liquid hourly space velocity in the range of from 0.3 to 20 h-1 for a duration of at least 1 h; and (ill) crystallizing the zeolitic material having a CHA-type framework structure from the mixture in the continuous flow reactor, wherein the mixture is heated to a temperature in the range of from 100 to 300°C; wherein the volume of the continuous flow reactor is in the range of from 50 cm3 to 75 m3- wherein the seed crystals comprise one or more zeolitic materials containing one or more cationic organotemplates as counter-ions at the ion exchange sites of the framework structure; wherein X is a trivalent element, wherein R5, R6, and R7 independently from one another stand for alkyl, and wherein R8 stands for cycloalkyl, as well as to a zeolitic material as obtained and/or obtainable according to the inventive process and to its use. |