ZEOLITE SSZ-52x
AssigneeChevron U.S.A. Inc.
InventorTracy DAVIS
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Abstract
The present invention relates to new crystalline zeolite SSZ-52x prepared using a quaternary ammonium cation templating agent, for example, having the structure: wherein X− is an anion which is not detrimental to the formation of the SSZ-52x. SSZ-52x is useful as a catalyst and shows improved durability, particularly with regard to NOx conversion.
Claims17
A zeolite having a mole ratio of 6-50 of an oxide selected from the group consisting of silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide and mixtures thereof, and exhibiting in the as synthesized form the XRD pattern of FIG. 4(a).
A method of preparing a crystalline material comprising an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof, said method comprising contacting under crystallization conditions sources of said oxides and a templating agent comprising a quaternary ammonium cation having the structure
- where X− is an anion which is not detrimental to the formation of the crystalline material, in a reaction mixture having the composition
- YO2/W2O3
- 15-60
- OH−/YO2
- 0.30-1.0
- Q/YO2
- 0.01-0.05
- M2/n/YO2
- 0.51-0.90
- H2O/YO2
- 15-50
A method of preparing a crystalline material comprising an oxide selected from silicon oxide, germanium oxide and mixtures thereof to an oxide selected from aluminum oxide, gallium oxide, iron oxide, and mixtures thereof, said method comprising contacting under crystallization conditions sources of said oxides and a templating agent comprising a quaternary ammonium cation having a structure selected from
- where X− is an anion which is not detrimental to the formation of the crystalline material, in a reaction mixture having the composition
- YO2/W2O3
- 15-60
- OH−/YO2
- 0.30-1.0
- Q/YO2
- 0.01-0.05
- M2/n/YO2
- 0.51-0.90
- H2O/YO2
- 15-50
Dependencies are inferred from the claim text.