The invention discloses a method for preparing a full-
silicon DD3R
zeolite molecular sieve with a pure phase and uniform
crystal morphology and size. The purpose of the invention is to provide the method for preparing the full-
silicon DD3R
zeolite molecular sieve with the pure phase and uniform
crystal morphology and size. The method is simple in process, low in cost, good in
repeatability and excellent in product quality. The method for preparing the full-
silicon DD3R
zeolite molecular sieve comprises the following steps: (1) adding an
organic structure directingagent, a silicon source and a mineralizer into deionized water to mix and agitate; (2) adding a
crystal seed to a mixing
system obtained from the step (1); after mixing, agitating and aging, transferring the mixture into a
hydrothermal reaction kettle to crystallize; (3), filtering and washing a sample obtained from the step (2), and obtaining the pure-phase DD3R zeolite molecular
sieve with uniform
crystal morphology and size after
drying and baking the sample. The method has the characteristics that the
crystallization time is short, the synthetic
energy consumption is low, and the obtained pure-phase DD3R zeolite molecular
sieve has excellent quality.