The effect of ultrasonic treatment (22 kHz) of a suspension of metakaolin, aluminum oxide and sodium hydroxide at a molar ratio Al 2 O 3 2SiO 2 : NaOH: Al 2 O 3 = 6: 12: 2 with subsequent heat treatment and hydrothermal crystallization for the synthesis of LTA zeolite. It has been established that an increase in the S: L ratio at the stage of ultrasonic treatment makes it possible to increase the yield of the target product. The optimal conditions for ultrasonic treatment were determined (amplitude 8 ?m, time about 10 min). It has been shown that under optimal conditions the degree of crystallinity of the LTA zeolite is 98%. A comparison of the regularities of the synthesis of LTA zeolite using ultrasonic treatment and mechanochemical activation is given.
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