Crystalline germanosilicate materials of new CIT-13 topology and methods of preparing the same
AssigneeCalifornia Institute of Technology
InventorsJoel E. Schmidt, Mark E. Davis, Ben W. Boal, Jong Hun Kang
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Abstract
The present disclosure is directed to novel crystalline germanosilicate compositions and methods of producing the same. In particular, the crystalline germanosilicate compositions are extra-large-pore compositions, designated CIT-13 possessing 10- and 14-membered rings. The disclosure describes methods of preparing these compositions using substituted benzyl-imidazolium organic structure-directing agents (OSDAs). Also disclosed are methods of using these crystalline compositions.
Claims25
A calcined crystalline microporous germanosilicate composition comprising a three-dimensional framework having pores defined by 10- and 14-membered rings and having a ratio of Si:Ge atoms in a range of from 2:1 to 16:1, wherein the calcined crystalline microporous germanosilicate composition exhibits a powder X-ray diffraction (XRD) pattern exhibiting at least five peaks at 6.45±0.2, 7.18±0.2, 12.85±0.2, 20.78±0.2, 26.01±0.2, and 26.68±0.2 degrees 2-θ.
A crystalline microporous germanosilicate composition comprising a three-dimensional framework having pores defined by 10- and 14-membered rings and having a ratio of Si:Ge atoms in a range of from 2:1 to 16:1, wherein the composition exhibits at least one of:
- (a) a powder X-ray diffraction (XRD) pattern exhibiting at least seven of the characteristic peaks at 6.45±0.2, 7.18±0.2, 12.85±0.2, 18.26±0.2, 18.36±0.2, 18.63±0.2, 20.78±0.2, 21.55±0.2, 23.36±0.2, 24.55±0.2, 26.01±0.2, and 26.68±0.2 degrees 2-θ;
- (b) a powder X-ray diffraction (XRD) pattern the same as shown in FIG. 1(B) or FIG. 1(C);
- or
- (c) representative unit cell parameters according to:
- Space group
- Cmmm
- a (Å)
- 27.4374(5)
- b (Å)
- 13.8000(2)
- c (Å)
- 10.2910(2)
- V (Å3)
- 3896.6(1)
- Z
- 8
- ρ (g/cm3)
- 2.144(2)
- λ (Å)
- 0.776381(1).
Dependencies are inferred from the claim text.