An efficient synthesis strategy for MOR zeolite

MOR zeolite has been widely applied in petrochemistry due to its special pore structure. Tetraethylammonium hydroxide (TEAOH) is a typical organic structure directing agent (OSDA) for the preparation of MOR with high SiO2/Al2O3 molar ratio. TEAOH is easy to decompose under high temperature which limits its further recycling. Herein, an efficient and rapid synthesis strategy for MOR zeolite with the assistance of organic/inorganic ad-ditives is developed. Introduction of N-methyl-2-pyrrolidone (NMP) and Na+ into the synthetic gel could effectively promote the nucleation of MOR and the whole crystallization could be completed within 22 h at 150 degrees C. Especially, both the low crystallization temperature and Na+ in the synthesis system can inhibit the decomposition of TEAOH, which is benefit for the recycle of the TEAOH. Through this strategy, nano-sized MOR zeolite (200-300 nm) with large mesoporous volume is successfully synthesized with a low dosage of TEAOH at 130 degrees C. And this sample exhibits super catalytic stability in isobutene oligomerization reaction due to its good diffusion property.

Automated summary

Here, an efficient and rapid synthesis strategy for MOR zeolite with the assistance of organic/inorganic additives is developed. The strategy effectively promotes the nucleation of MOR and benefits the recycling of the organic structure directing agent TEAOH. By this strategy, nano-sized MOR zeolite with large mesoporous volume is successfully synthesized.