Chemistry of inorganic compounds – Zeolite – Organic compound used to form zeolite
Reexamination Certificate
2005-02-07
2008-10-28
Brunsman, David M (Department: 1793)
Chemistry of inorganic compounds
Zeolite
Organic compound used to form zeolite
C423S704000, C502S004000, C502S060000, C502S064000, C502S071000, C502S077000
Reexamination Certificate
active
07442367
ABSTRACT:
The present invention discloses a production method for a zeolite shaped body in which a tetrapropylammonium hydroxide (TPAOH) solution and tetrapropylammonium bromide (TPABr) are added to a silica sol, an obtained prepared solution is heated under a condition that crystallization and/or precipitation does not occur in the prepared solution in a sealed vessel, the heated prepared solution is dried, an obtained dry gel is shaped, and the shaped dry gel is subjected to crystallization treatment in steam, and it is possible to efficiently produce a zeolite shaped body on which a zeolite membrane can be formed and maintained without generating any crack, and which satisfies both reduction of pressure loss and maintenance or improvement of mechanical strength, when used as a gas separation membrane such as a molecular sieve membrane or a pervaporation membrane.
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Nakamura Shinji
Suzuki Kenji
Tomita Toshihiro
Yabuki Miyuki
Brunsman David M
Burr & Brown
NGK Insulators Ltd.
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