Zeolite with tuned aluminum content and mesoporosity
AssigneeW.R. Grace & Co.-Conn.
InventorsKunhao Li, Javier Garcia-Martinez
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Abstract
Compositions and methods for preparing mesoporous and/or mesostructured materials from low SAR zeolites are provided herewith. In particular, methods are provided that involve: (a) providing a low SAR zeolite, (b) optionally subjecting the low SAR zeolite to an acid framework modification, and (c) subjecting the framework-modified zeolite to a mesopore formation treatment. The resulting mesoporous zeolites can have bi-modal mesoporosity and higher aluminum contents relative to existing mesoporous zeolites.
Claims9
A low SAR zeolite, wherein said low SAR zeolite is selected from the group consisting of a ZSM-5 having a silica to alumina molar ratio of 17 or less, wherein said low SAR zeolite has a total 20 to 300 A diameter mesopore volume of at least 0.08 cc/g and a dV/log(d) of at least 0.19.
A mesoporous zeolite, comprising a ZSM-5 zeolite having a silica to alumina molar ratio of 17 or less, wherein said mesoporous zeolite has a dV/log(d) in the range of 0.3 to 100, a mesopore ratio in the range of 0.2 to 1.2, and a total 20 to 300 A diameter mesopore volume of at least 0.08 cc/g.
Dependencies are inferred from the claim text.