SAPO-11 MOLECULAR SIEVE, ITS SYNTHETIC METHOD AND A CATALYST CONTAINING THE MOLECULAR SIEVE

摘要

The present invention relates to an SAPO-11 silocoaluminophosphate molecular sieve, its preparation and a catalyst containing the molecular sieve. After being calcinated to remove templating agent, the molecular composition of said molecular sieve has a empirical formula in the anhydrous oxides form: Al2O3 : yP2O5 : ZSiO2, wherein the value of y is 0.60∼1.20, the value of z is 0.05∼1.3; and it characterized in that: the data of XRD of said calculated molecular sieves is as that showed in table 3, the crystalline structure of said calcinated molecular sieve is essentially the same as that the of the synthesized molecular sieves is essentially the same as that of the synthesized molecular sieves which have not been subject to calcination to remove the templating agent. Said catalyst comprises 10∼85 wt.% of SAPO-11 molecular sieve, 0.05∼1.5 wt.% of Pd or Pt, with the balance of alumina. Comparing with the same catalyst of prior art, said catalyst has remarkably increased selectivity and product yield, when it is used in hydrocarbon isomerization.