Direct Hydrothermal Synthesis of High-silica SSZ-39 Zeolite with Small Particle Size

A high-silica SSZ-39 zeolite with an Si/Al molar ratio as high as 16 and with a particle size as low as 300 nm has been directly synthesized by tuning both alkali and water contents in the synthesis mixture, followed by adding relatively high-silica FAU crystals. A high-silica SSZ-39 zeolite with an Si/Al molar ratio as high as 16 and with the particle size as low as 300 nm has been directly synthesized by tuning both alkali and water contents in the synthesis mixture, followed by adding relatively high-silica FAU crystals.