Preparation method for nanometer flaky ferrierite molecular sieve

The invention discloses a preparation method for a nanometer flaky ferrierite molecular sieve. The preparation method is characterized by comprising the following steps: mixing an inorganic silicon source, an aluminum source and an alkali source with pyridine, piperidine, piperazine, tetrahydrofuran or hexylenediamine; then introducing cetyl trimethyl ammonium bromide (CTABr) and carrying out stirring at room temperature for 1 to 3 h; then carrying out a crystallization reaction at 120 to 180 DEG C for 2 and 10 d; and after completion of the reaction, carrying out filtering and drying so as to obtain the nanometer flaky ferrierite molecular sieve. Compared with the prior art, the nanometer flaky ferrierite molecular sieve prepared in the invention has a great outer specific surface area, a high accumulation mesopore volume as high as 0.88 ml/g and a flake thickness of less than 10 nanometers; and the preparation method has the advantages of easiness, mild reaction conditions, a wide synthesis phase, capacity of preparing pure-phase ferrierite in a wide range of a silica-alumina ratio, high yield of ferrierite, certain industrialization prospects and substantial economic values.