The invention discloses a
molecular sieve catalyst and a preparation method thereof. The preparation method comprises the following steps: S1, preparing a
molecular sieve precursor solution by using an aluminum source, a
silicon source, a
phosphor source and template agent as materials through a hydrothermal method; S2, directly mixing
molecular sieve filter cakes obtained by filtering and washing the molecular
sieve precursor solution with water,
grinding the
mixed solution to obtain molecular
sieve sizing agent, adding ingredients to the molecular
sieve sizing agent for continuously
grinding for 2-4 hours to obtain a molecular sieve catalyst semi-finished product; and S3,
drying, pelleting and
roasting the molecular sieve catalyst semi-finished product to obtain the molecular sieve catalyst. According to the preparation method disclosed by the invention, the steps of
drying and high-temperature
roasting and activating after the washing and filtering of the molecular sieve
sizing agent are reduced; the problems that the product yield is reduced and the environment is affected when the landing
powder is much at the charging and discharging steps of the high-temperature
roasting process are avoided; and the problem that the sizing agent is difficult to
grind as the molecular sieve catalyst semi-finished product is easy to
agglomerate after the roasting is also solved. Moreover, the quality and the performance of the finished product molecular sieve catalyst are ensured while the production process is optimized.