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US 6,635,233 B2Granted
CFI-type zeolite, process for preparation of the same, catalyst prepared from the same, and process for conversion of organic compounds
AssigneeToray Industries, Inc.
InventorsHajime Kato, Masahito Yoshikawa, Kazuyoshi Iwayama, Shinichi Sakaguchi, Naoyuki Uchiyama
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Abstract
A CFI-type zeolite where the atomic ratio of silicon to the heteroatom is 45 or less and the long axes of the crystals are 0.7 μm or less is useful as a catalyst for conversion reaction of aromatic compounds because the zeolite has a number of active sites and small crystals.
Claims9
A CFI-type zeolite comprising an atomic ratio of silicon to a heteroatom of 45 or less, and long axes of crystals of 0.7 μm or less.
A process for preparing CFI-type zeolite comprising the steps of:
- preparing a reaction mixture having
- (1) a molar ratio of LiOH/SiO2<0.15;
- and
- (2) a molar ratio of ROH/SiO2>0.3 (molar ratio, ROH is an alkylsparteinium hydroxide);
- and
- subjecting said reaction mixture to hydrothermal treatment to produce a CFI-type zeolite having an atomic ratio of silicon to a heteroatomic ratio of silicon to a heteroatom of 45 or less, and long axes of crystals are 0.7 μm or less.
3 more elements
Dependencies are inferred from the claim text.