Synthesis of cha zeolitic materials, cha zeolitic materials obtainable therefrom and scr catalysts comprising the same

A process for preparing a zeolite having a CHA-type framework structure comprising X2O3 and YO2, wherein X is a trivalent element and Y is a tetravalent element, which includes

• (1) preparing a synthesis mixture comprising
• (A) a source for X2O3,
• (B) a source for YO2, and
• (C) a source for an organic structure directing agent (OSDA) comprising a diquaternary ammonium cation of formula (I) or a combination of diquaternary ammonium cations of formula (I),
• in which
• R1, R2, R3, R4, R5 and R6, independently from each other, are selected from C1-C10 alkyl, and
• n is an integer in the range of from 3 to 10,
• or
• in which
• one of R1, R2 and R3 is selected from C1-C10 alkyl and the other two are linked together to form a C4-C6 alkylene,
• one of R4, R5 and R6 is selected from C1-C10 alkyl and the other two are linked together to form a C4-C6 alkylene, and
• n is an integer in the range of from 3 to 10;
• and
• (2) subjecting the synthesis mixture to crystallization conditions to form a zeolite having a CHA-type framework structure.