Production method for zeolite shaped body and production...

C - Chemistry – Metallurgy – 01 – B

Patent

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C01B 37/02 (2006.01) B32B 9/00 (2006.01)

Patent

CA 2494990

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.

L'invention concerne un procédé de production d'un moulage en zéolite caractérisé en ce que ce procédé consiste à ajouter une solution d'hydroxyde de tétrapropylammonium (TPAOH) et du bromure de tétrapropylammonium (TPABr) à un sol siliceux, pour obtenir un liquide de préparation. Le procédé consiste à chauffer ce liquide de préparation dans un récipient étanche, dans des conditions telles que la cristallisation et/ou la précipitation ne se produisent pas dans ce liquide. Le procédé consiste à sécher le liquide de préparation après le traitement thermique, à mouler le gel sec ainsi obtenu et à effectuer la cristallisation du gel sec moulé dans de la vapeur. Ce procédé permet de produire efficacement un moulage en zéolite sur lequel un film de zéolite peut être formé et maintenu sans craquelure. Lorsqu'il est utilisé en tant que film de séparation de gaz, notamment en tant que film de tamis moléculaire ou que film de perméation liquide, ce film satisfait à la fois aux exigences de diminution ou de perte de pression, et de maintien d'amélioration de résistance mécanique.

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