High-selectivity supported sapo membranes

Details High-selectivity supported sapo membranes High-selectivity supported sapo membranes

B - Operations, Transporting

01

D

B01D 71/70 (2006.01) B01D 53/22 (2006.01) B01D 69/12 (2006.01)

Patent

CA 2559897

SAPO membranes and methods for their preparation and use are described. The SAPO membranes are prepared by contacting at least one surface of a porous membrane support with an aged synthesis gel. A layer of SAPO crystals is formed on at least one surface of the support. SAPO crystals may also form in the pores of the support. SAPO-34 membranes of the invention can have improved selectivity for certain gas mixtures, including mixtures of carbon dioxide and methane.

L'invention concerne des SAPO et des procédés destinés à leur préparation et à leur utilisation. Les membranes SAPO sont préparées par mise en contact d'au moins une surface d'un support de membrane poreux avec un gel de synthèse vieilli. Une couche de cristaux SAPO est formée sur au moins une surface du support. Les cristaux SAPO peuvent également se former dans les pores du support. Les membranes SAPO-34 de l'invention présentent une sélectivité améliorée pour certains mélanges gazeux, notamment des mélanges de dioxyde de carbone et de méthane.

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