| abstract |
The present invention discloses a method for synthesizing silica high content molecular sieves having a CHA crystal structure using a structure directing agent comprising 1-adamantamine, 2-quinuclidinol or 2-exo-aminonorbornane derived cations. have. The synthesis is carried out in the absence of fluorine.n n n Silica high content molecular sieve, molecular sieves all silica, structure directing agent, CHA crystal structure |