Preparation of molecular sieve SSZ-33
AssigneeChevron U.S.A. Inc.
InventorsLun-Teh Yuen, Stacey Zones
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Abstract
Crystalline molecular sieve SSZ-33 is prepared using a mixture comprising a N,N,N -trialkyl-8-ammonium-tricyclo[5.2.1.02,6]decane quaternary ammonium cation and a N,N-dialkyl-8-amino-tricyclo[5.2.1.02,6]decane compound.
Claims19
A method for preparing a molecular sieve having a mole ratio of greater than about 15:1 of (1) silicon oxide, germanium oxide and mixtures thereof to (2) boron oxide or a mixture of boron oxide with aluminum oxide, gallium oxide, titanium oxide or iron oxide and mixtures thereof, and having, after calcination, the X-ray diffraction lines of Table II, said method comprising:
- A. forming an aqueous reaction mixture comprising (1) a source of silicon oxide, germanium oxide and mixtures thereof;
- (2) a source of boron oxide or a mixture of boron oxide with aluminum oxide, gallium oxide, titanium oxide or iron oxide and mixtures thereof;
- (3) a source of alkali metal or alkaline earth metal;
- (4) an N,N,N-trialkyl-8-ammonium-tricyclo[5.2.1.02,6]decane quaternary ammonium cation, and (5) an N,N-dialkyl-8-amino-tricyclo[5.2.1.02,6]decane compound;
- and
- B. maintaining said aqueous mixture under sufficient crystallization conditions until crystals are formed.
A molecular sieve having a composition, as-synthesized and in the anhydrous state, in terms of mole ratios as follows:
- (1 to 5) Q:
- (0.1 to 1)Mn+:WaOb:(greater than 15) YO2
- where Y is silicon, germanium or a mixture thereof, W is boron, or a mixture of boron, aluminum, gallium, titanium, iron or mixtures thereof, a is 1 or 2, b is 2 when a is 1, b is 3 when a is 2, M is an alkali metal or alkaline earth metal, n is the valence of M, and Q is a mixture of a N,N,N-trialkyl-8-ammonium-tricyclo[5.2.1.02,6]decane quaternary ammonium cation and a N,N-dialkyl-8-amino-tricyclo[5.2.1.02,6]decane compound.
An improved method for preparing a molecular sieve from source materials for said molecular sieve and an organic structure directing agent, the improvement comprising employing a structure directing agent comprising a mixture of an N,N,N-trialkyl-8-ammonium-tricyclo[5.2.1.02,6]decane quaternary ammonium cation, and an N,N-dialkyl-8-amino-tricyclo[5.2.1.02,6]decane compound.
Dependencies are inferred from the claim text.