Patent ID: 8497223
Filing Date: 2013-07-30
Classification: B01D,C01B

Abstract:
1. A process for the production of DDR-type zeolite membranes, comprising: a seed crystal-forming step of immersing a porous substrate in a seed crystal-forming raw material solution containing 1-adamantanamine, silica, water, and a DDR-type zeolite powder dispersed therein and performing hydrothermal synthesis to form plural DDR-type zeolite crystal particles on a surface of the porous substrate; and a membrane-forming step of immersing the porous substrate with DDR-type zeolite crystal particles formed on the surface thereof in the membrane-forming raw material solution containing 1-adamantanamine, silica, water, and no DDR-type zeolite powder and performing hydrothermal synthesis to form a DDR-type zeolite membrane on the surface of the porous substrate.