An IM-5
molecular sieve synthesis method comprises the following steps: 1, dissolving an inorganic alkali, an aluminum source and a template in deionized water, and uniformly mixing to prepare a
mixed solution; 2, adding a
solid silica gel to the
mixed solution obtained in step 1, adding a template precursor, and uniformly mixing to prepare a
colloid or a
solid-liquid mixture; and 3, transferring the
colloid or
solid-liquid mixture obtained in step 2 to a
crystallization kettle, carrying out hydrothermal
crystallization for 1-10 days, cooling after the
crystallization to obtain a mixed liquid, and washing, filtering and
drying the mixed liquid to obtain raw IM-5
molecular sieve powder, wherein reactants comprise SiO2, Al2O3, M2O, R, A and H2O, a
molar ratio of SiO2:Al2O3:M2O:R:A:H2O is 60:(0.3-6):(6-20):(4-15):(1.2-6):(300-1200), M2O is an
alkali metal oxide, R is the template, and A is the template precursor. The IM-5
molecular sieve synthesis method has the advantages of good product
repeatability, effective reduction of the
water content, increase of the concentration of the template, crystallization time shortening and single kettle yield increase.