Germanosilicate CIT-14/IST and its preparation from germanosilicate CIT-13/OH
AssigneesCalifornia Institute of Technology, Chevron U.S.A. Inc.
InventorsMark E. Davis, Jong Hun Kang, Dan Xie
Life of this patent
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Abstract
The present disclosure is directed to large-pore germanosilicate compositions designated CIT-13/OH and CIT-14/IST, the two large-pore germanosilicate each having a three-dimensional framework with 10- and 14-membered ring channels and 8- and 12-membered ring channels, respectively. The disclosure also sets forth methods for converting the former to the latter under conditions consistent with an inverse sigma transformation. Uses of the large-pore germanosilicate compositions are also disclosed.
Claims17
A crystalline microporous germanosilicate composition, designated CIT-14/IST, having 8- and 12-membered ring channels, characterized by a powder X-ray diffraction (XRD) pattern having at least characteristic peaks at 7.59±0.5, 8.07±0.5, 12.88±0.3, 19.12±0.3, 19.32±0.3, 20.73±0.3, 22.33±0.3, 24.37±0.3, 27.19±0.3, and 27.69±0.3 degrees 2-θ.
A crystalline microporous germanosilicate composition, designated CIT-14/IST, having 8- and 12-membered ring channels, characterized by a powder X-ray diffraction (XRD) pattern having at least five of the characteristic peaks at 7.59±0.5, 8.07±0.5, 12.88±0.3, 19.12±0.3, 19.32±0.3, 20.73±0.3, 22.33±0.3, 24.37±0.3, 27.19±0.3, and 27.69±0.3 degrees 2-θ, wherein the crystalline microporous germanosilicate CIT-14/IST composition has a Si:Ge ratio in a range of from 12:1 to 20:1.
Dependencies are inferred from the claim text.