Effect of mechanical treatment on properties of zeolites with chabazite structure

Zeolites are a valuable material having a wide variety of applications. We have examined the effect of mechanical activation on physical-chemical properties of commercial brands zeolite SAPO-34 and SCT-323. It has been shown that the amount of amorphous phase and the specific surface area depends on mechanical treatment. Specific surface area of the zeolites decreases strongly during the grinding process in mills. With the increase of milling time the particles size of zeolites decreased. An increase in amorphisation was observed. Specific surface area of zeolites after mechanical activation in a tumbling ball during 96 hours and annealing up to 800 degrees C with an isothermal holding time of 1 hour does not lead to marked changes and decreases strongly after annealing at 1000 degrees C/h. It has been shown that the milling time of ball milling is a powerful method to obtain the necessary specific surface.