Patent ID: 7973090
Filing Date: 2011-07-05
Classification: B01D,C01B

Abstract:
1. A process for producing a zeolite membrane, which comprises a seed crystal forming step of placing, in a pressure-resistant vessel, a seeding sol containing silica, water and a structure-directing agent and a support in a state that the support is immersed in the seeding sol and heating the heat-resistant vessel to form a zeolite seed crystal on the surface of the support, and a membrane formation step of allowing the zeolite seed crystal to grow to form a zeolite membrane on the surface of the support, wherein, in the seed crystal fanning step, the molar ratio of water/silica in the seeding sol is set at water/silica of from 10 to 50 and the heating of the pressure-resistant vessel is conducted at a temperature of from 90 to 130° C.