Synthesis and properties of a zeolite LEV analogue from the system—Na2O–Al2O3–SiO2–N,N-dimethylpiperidine chloride–H2O

A new structure-directing agent (SDA) was firstly reported for the synthesis of a zeolite LEV analogue. N,N-dimethyl piperidine performed the SDA function, and induced the synthesis of products from a zeolite MOR with 12-ring channels to a zeolite LEV analogue with only 8-ring channels. The zeolite LEV analogue was synthesized from gels with initial compositions (5.0–6.0)Na2O–Al2O3–(10–200)SiO2–(4.0–8.0)N,N-dimethyl piperidine–400H2O at 150 °C. The 29Si NMR spectra showed that the relative intensities of the first line at −115 ppm for low Si/Al ratios were lower than that at high Si/Al ratios. Varying ion exchanges led to different acidities in the zeolite LEV analogue, with the acidity of H-LEV-HCl higher than that of H-LEV-NH3·H2O. Zeolite H-LEV in hydration of propene showed a higher selectivity of 1-propanol.