Organotemplate-free synthetic process for the production of a zeolitic material
The present invention relates to an organotemplate-free synthetic process for the production of a zeolitic material having a BEA framework structure comprising YO 2 and optionally comprising X 2 O 3 , wherein said process comprises the steps of (1) preparing a mixture comprising seed crystals and at least one source for YO 2 ; and (2) crystallizing the mixture; wherein Y is a tetravalent element, and X is a trivalent element, wherein the zeolitic material optionally comprises at least one alkali metal M, wherein when the BEA framework additionally comprises X 2 O 3 ; the mixture according to step (1) comprises at least one source for X 2 O 3 , and wherein the seed crystals comprise zeolitic material having a BEA framework structure, preferably zeolite Beta.
1. An organotemplate-free zeolitic material having a BEA framework structure obtained by an organotemplate-free synthetic process, having an X-ray diffraction pattern comprising at least the following reflections:
Intensity (%)
Diffraction angle 2θ/° [Cu K(alpha 1)]
[12-32]
[21.07-21.27]
100
[22.12-22.32]
[14-34]
[25.01-25.21]
[12-32]
[26.78-26.98]
[14-34]
[28.39-28.59]
[28-48]
[29.24-29.44)
[10-30]
[30.00-30.20]
[11-31]
[32.86-33.26]
[13-33]
[42.90-43.30]
wherein 100% relates to the intensity of the maximum peak in the X-ray powder diffraction pattern,
wherein the BEA framework structure comprises YO 2 and optionally comprises X 2 O 3 ,
wherein Y is a tetravalent element, and X is a trivalent element,
wherein the zeolitic material optionally comprises at least one alkali metal M, and
wherein said process comprises
(1) preparing a mixture comprising seed crystals and at least one source for YO 2 ; and
(2) crystallizing the mixture,
wherein Y is a tetravalent element, and X is a trivalent element,
wherein the zeolitic material optionally comprises at least one alkali metal M,
wherein when the BEA framework additionally comprises X 2 O 3 , the mixture according to (1) comprises at least one source for X 2 O 3 , and
wherein the seed crystals comprise zeolitic material having a BEA framework structure.
2. The organotemplate-free zeolitic material according to claim 1 , wherein the X-ray diffraction pattern comprises the following reflection:
Intensity (%)
Diffraction angle 2θ/° [Cu K(alpha 1)]
[11-31]
[25.53-25.73]
3. The organotemplate-free zeolitic material according to claim 1 , wherein the YO 2 :X 2 O 3 molar ratio ranges from 3 to 20.
4. The organotemplate-free zeolitic material according to claim 1 , wherein the molar ratio of alkali metal M:X 2 O 3 ranges from 1 to 5.
5. The organotemplate-free zeolitic material according to claim 1 , wherein Y is Si.
6. The organotemplate-free zeolitic material according to claim 1 , wherein X is Al.
7. The organotemplate-free zeolitic material according to claim 1 , wherein said material comprises sodium.
8. The organotemplate-free zeolitic material according to claim 1 , wherein the BET surface area of the zeolitic material determined according to DIN 66135 ranges from 400 to 650 m 2 /g.
9. The organotemplate-free zeolitic material according to claim 1 , wherein said material comprises zeolite Beta.