Patent ID: 6692640
Filing Date: 2004-02-17
Classification: B01D,B01J

Abstract:
A method for producing a mordenite (MOR) zeolite membrane on a porous substrate, comprising the steps of:immersing the porous substrate in a gel of raw material comprising zeolite constitution elements in molar ratios of 40-400 of SiO2/Al2O3, 10-120 of H2O/Na2O, and 10-40 of H2O/SiO2; and subjecting the gel in the presence of the porous substrate to hydrothermal synthesis at 150Â° C. or more to crystallize said zeolite constitution elements and form a mordenite zeolite membrane on the porous substrate, wherein said mordenite zeolite membrane has crystals substantially oriented in a specific crystalline direction.