The invention provides a method for preparing
chabazite and a
chabazite film in the absence of a template agent. Pure
chabazite is formed through induction of out-of-phase
crystal nucleus T-shaped
zeolite under the condition of not adding an organic template agent. The chabazite
molecular sieve film is formed through induction by loading formed chabazite on the outer surface of a porous support as a
crystal seed. The method is characterized in that:
silicon powder and
sodium metaaluminate are used as a
silicon source and an aluminum source; based on the
molar ratio of oxides, the ratios of components which are prepared into
sol are that: the
molar ratio of SiO2 to Al2O3 is equal to 15-30, the
molar ratio of OH<-> to SiO2 is equal to 0.9-1.5, the molar ratio of Na<+> to K<+> is equal to 0.1-1, and the molar ratio of H2O to SiO2 is equal to 18-40; the
sol for
coating the
crystal seed is subjected to
hydrothermal synthesis at the temperature of 100-160 DEG C for 16-72 hours; and a compact chabazite film is synthesized on a porous carrier. Through the method for preparing the chabazite and the chabazite film, the expensive organic template agent is prevented from being added, the synthesis process is simple, and the
repeatability is high. The synthesized film shows better stability in an inspection acid medium and can be widely applied to a
pervaporation separation process and a
pervaporation film reactor of an acidic
system.