Mesopore molecular sieve and process for the production thereof

Details Mesopore molecular sieve and process for the production thereof Mesopore molecular sieve and process for the production thereof

1999-03-23

2001-09-04

Dunn, Tom (Department: 1755)

Catalyst, solid sorbent, or support therefor: product or process

Zeolite or clay, including gallium analogs

And additional al or si containing component

C502S060000, C502S062000, C502S063000, C502S085000, C423S701000, C423S705000, C423S708000

Reexamination Certificate

active

06284696

ABSTRACT:

TECHNICAL FEILD
The present invention relates to a mesopore molecular sieve and a production process thereof.
BACKGROUND ART
A mesopore molecular sieve is a new material which is expected, as an inorganic porous substance having a uniform pore size in a mesopore region, to be used in wide applications such as catalysts and adsorbents. U.S. Pat. Nos. 5,098,684, 5,102,643 and 5,108,725 and JP-W-A-5-503499 (the term “JP-W-A” as used herein means a “published Japanese national stage of international application”) disclose a process for synthesizing a mesopore molecular sieve by using, as a template, a quaternary ammonium salt or phosphonium salt having a long-chain alkyl group and conducting hydrothermal synthesis.
JP-A-4-238810 (the term “JP-A” as used herein means an “unexamined published Japanese patent application”) discloses a process for synthesizing a mesopore molecular sieve by treating a layered silica with a long-chain alkyl ammonium cation in accordance with an ion exchange method.
JP-A 5-254827 discloses a process for modifying a synthesized mesopore molecular sieve, which comprises treating the sieve with an alkylsilane coupling agent having a methyl group, etc. reactions with a silanol group etc. which exists on the surface of the mesopore skeleton, thereby adding an alkylailyl group to control the pore size or adding a trimethylailyl group to modify the surface.
An object of the present invention is to provide a novel mesopore molecular sieve which has a hydrocarbon group bonded directly to a silicon atom constituting the skeleton of the molecular sieve and a production process thereof.
DISCLOSURE OF THE INVENTION
In one aspect of the present invention, the present invention relates to a mesopore molecular sieve having a hydrocarbon group bonded directly to a silicon atom in the metal oxide skeleton constituting the molecular sieve, wherein the content of said hydrocarbon group is from 0.01 to 0.6 mol per mol of the metal oxide. In another aspect, the present invention relates to a process for producing a mesopore molecular sieve having a hydrocarbon atom bonded to a silicon atom in the molecular sieve skeleton, which comprises synthesizing the mesopore molecular sieve, in the presence of a template, from:
a silane compound represented by the following formula (1):
R
n
SiX
(4−n)
  (1)
wherein R represents a hydrocarbon group selected from C
1-6
hydrocarbon groups and hydrocarbon groups substituted with an N-, O-, S-, P- or halogen-containing group; n represents 1, 2 or 3; and X is selected from C
1-6
alkoxy groups, aryloxy groups, a hydroxyl group and halogen atoms and a plurality of X may be the same or different; and
a metal oxide and/or a precursor thereof.


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