Method for synthesizing SAPO molecular sieve by solvothermal method and catalyst prepared thereby

摘要

Provided are a method for synthesizing SAPO molecular sieve by solvothermal method and the catalyst prepared thereby. The synthesis method comprises the following steps: a) mixing organic amine, aluminium source, silicon source, phosphor source and water according to the molar ratio of 6 - 30 : 1 : 0.5 - 5 : 0.01 - 1.0 : 0.1 - 15 to obtain an initial mixture for preparing SAPO molecular sieve, wherein the molar ratio of water and organic amine is less than 2.0; b) aging the initial mixture obtained in step a) under stirring at 30 - 60 ℃ for no more than 24 hours to obtain an initial gel; c) crystallizing the initial gel obtained in step b) at 150 - 250 ℃ for 0.5 - 15 days. After being calcinated at 400 - 700 ℃ in air, the SAPO molecular sieve prepared thereby is used as catalyst for acid catalyzed reactions or for conversion reactions of oxygen-containing compounds to olefins.