METHOD FOR PREPARING DDR TYPE ZEOLITE FILM, DDR TYPE ZEOLITE FILM, AND COMPOSITE DDR TYPE ZEOLITE FILM, AND METHOD FOR PREPARATION THEREOF

摘要

Preparation of DDR type zeolite film comprises synthesizing using water and heating raw material containing: (a) 1-adamantane amine; (b) silica; (c) water; and (d) ethylene diamine with DDR type zeolite powder as seed crystals. The molar ratio of (a) to (b) is 0.03-0.4, the molar ratio of (c) to (b) is 20-500, and the molar ratio of (e) to (a) is 5-32. Independent claims are also included for: (1) a gas separation method using the film to separate gas mixtures containing two or more of CO 2, H 2, O 2, N 2, methane, n-C 4H 10, i-C 4H 10, SF 6, C 2H 6, C 2H 4, C 3H 8, C 3H 6, CO, and NO; (2) an apparatus used for the gas separation; (3) a composite comprising a porous substrate and a DDR zeolite layer; and (4) preparation of the composite.