Method for preparing ddr type zeolite film, ddr type zeolite film, and composite ddr type zeolite film, and method for preparation thereof

摘要

A production method of a DDR type zeolite membrane, characterized in that a DDR type zeolite membrane is formed by carrying out hydrothermal synthesis with using a raw material solution having a containing ratio of 1-adamantanamine to silica (1-adamantanamine/SiO2) of a molar ratio of 0.03 to 0.4, a containing ratio of water to the silica (water/SiO2) in a molar ratio of 20 to 500, and a containing ratio of ethylenediamine to the 1-adamantanamine (ethylenediamine/1-adamantanamine) in a molar ratio of 5 to 32; and a DDR type zeolite powder to be a seed crystal.