Process for the preparation of MTW-type zeolite

摘要

A method of making an MTW type zeolite comprising: Providing a reaction mixture having a composition represented by the following molar ratio: SiO ₂ / Al ₂ O ₃ = 10 to 150 Na ₂ O / SiO ₂ = 0.075 to 0.23 H ₂ O / SiO ₂ = 5 to 50, - Adding a beta-type zeolite having a ratio of SiO ₂ / Al ₂ O ₃ of 8 to 50 and containing no structure determining agent, as a seed to the reaction mixture, in a proportion of 0.1 mass% to 20 mass%, based on the silica component in the reaction mixture, and Heating the reaction mixture to which the seed crystal had been added at 100 ° C to 200 ° C in a sealed state.