Process for the preparation of a dealuminated zeolitic material having the bea framework structure

A zeolitic material having a BEA framework structure having an X-ray diffraction pattern comprising at least the following reflections:

• Intensity (%)
• Diffraction angle 2θ/° [Cu K(alpha 1)]
• [8-46]
• [21.49-21.79]
• 100
• [22.55-22.85]
• [7-37]
• [25.45-25.75]
• [5-30]
• [27.10-27.40]
• [4-23]
• [28.96-29.26]
• [4-23]
• [29.75-30.05]
• [2-14]
• [33.64-33.94]
• wherein 100% relates to the intensity of the maximum peak in the X-ray diffraction pattern, and wherein the BEA framework structure comprises YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element.

A zeolitic material having a BEA framework structure, wherein the BEA framework structure comprises YO2 and X2O3, wherein Y is a tetravalent element, and X is a trivalent element, and wherein the 27Al MAS NMR of the zeolitic material comprises:

• a first peak (P1) in the range of from 45 to 65 ppm;
• a second peak (P2) in the range of from 11 to 44 ppm;
• and
• a third peak (P3) in the range of from −10 to 10 ppm;
• wherein the integration of the first, second, and third peaks in the 27Al MAS NMR of the zeolitic material offers ratios of the integration values P1:P2:P3 comprised in the range of from 1:(0.1-0.8):(0.4-0.9).