CHA-type titanosilicate separation membrane and production method therefor and gas separation method
AssigneesHitachi Zosen Corporation, The School Corporation Kansai University
InventorsSatoshi Imasaka, Sadao Araki, Hideki Yamamoto, Hiroyasu Ishii
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Abstract
The present invention provides a titanosilicate separation membrane which can also be used for separating a mixed gas containing a molecule having a relatively small size, has high durability in a high temperature environment, and has a high permeation rate and a high selectivity for a mixed gas containing water vapor. A titanosilicate separation membrane has a CHA-type titanosilicate crystal structure formed on a porous support, wherein aluminum is not substantially contained in the backbone of the titanosilicate crystal structure, and the titanosilicate crystal structure is constituted by silicon, oxygen, and titanium.
Claims3
A method for producing a titanosilicate separation membrane having a CHA-type titanosilicate crystal structure formed on a porous support, comprising:
- a step of producing a seed crystal by performing hydrothermal synthesis in a first synthetic gel obtained by mixing a first raw material containing a silicon source, a titanium source, a fluoride, N,N,N-trialkyl-1-adamantaneammonium cations, and water;
- a step of carrying the seed crystal on the porous support;
- and
- a step of applying a second synthetic gel obtained by mixing a second raw material containing a silicon source, a titanium source, a fluoride, N,N,N-trialkyl-1-adamantaneammonium cations, and water to the porous support having the seed crystal carried thereon, and performing hydrothermal synthesis.
Dependencies are inferred from the claim text.