Patent ID: 8163259

Claim:
A method of synthesizing a molecular sieve comprising at least one intergrown phase of an AFX framework-type molecular sieve inserted along the hexagonal axis into at least one intergrown phase of a CHA framework-type molecular sieve, the method comprising: (a) preparing a reaction mixture comprising sources of alumina, phosphorus, and, optionally, silica and further comprising at least one first organic directing agent for directing the synthesis of an AFX framework-type molecular sieve and at least one second organic directing agent for directing the synthesis of a CHA framework-type molecular sieve; (b) maintaining said reaction mixture under conditions sufficient to form crystals of said molecular sieve; and (c) recovering said molecular sieve comprising at least one intergrown phase of an AFX framework-type molecular sieve inserted along the hexagonal axis into at least one intergrown phase of a CHA framework-type molecular sieve.