The application belongs to the technical field of
zeolite molecular sieve synthesis, and particularly relates to a method for synthesizing SSZ-39
molecular sieve and application. The synthesis method comprises the following steps: uniformly stirring a template agent, water, an alkali source, an
amorphous silicon source and an amorphous aluminum source, uniformly stirring the pH
regulator after adding the pH
regulator, uniformly stirring the SSZ-39
molecular sieve seeds, obtaining an initial gel, and then sequentially performing
crystallization treatment,
filtration, washing,
drying and
calcination to obtain a Na type molecular
sieve. The application uses conventional
silicon sources and aluminum sources, starts from amorphous raw materials, and adds a small amount of
crystal seeds for assistance, thereby avoiding the use of expensive FAU type molecular
sieve in the traditional synthesis SSZ-39 molecular
sieve conversion method, realizing low-cost synthesis of the SSZ-39 molecular sieve and obtaining a high yield, and for the first time, the amorphous
raw material directly synthesizes the SSZ-39 molecular sieve with a yield of more than 72%. After Cu modification, the obtained molecular sieve sample exhibits excellent catalytic performance and high hydrothermal stability in the NH3-SCR reaction.