Claims
- 1. A crystalline aluminosilicate zeolite catalyst having a crystal size of at least about 1 micron, a silica-to-alumina ratio of at least about 12 and a constraint index of about 1 to about 12, said zeolite comprising a Group 2B component, a Group 8 component and magnesium that have been incorporated into said zeolite in that order.
- 2. The catalyst of claim 1 wherein the Group 2B metal is zinc and the Group 8 metal is palladium.
- 3. The catalyst of claim 2 wherein the magnesium is in the form of magnesium oxide.
- 4. The catalyst of claim 2 wherein the zinc and palladium are added by impregnation.
- 5. The catalyst of claim 3 wherein the zinc, palladium and magnesium are added by impregnation.
- 6. The catalyst of claims 1, 3 or 5 wherein the zeolite is ZSM-5.
- 7. The catalyst of claims 1, 3 or 5 wherein the zeolite is ZSM-11.
- 8. The catalyst of claims 1, 3 or 5 wherein the zeolite is ZSM-12.
- 9. The catalyst of claims 1, 3 or 5 wherein the zeolite is ZSM-35.
- 10. The catalyst of claims 1, 3 or 5 wherein the zeolite is ZSM-38.
- 11. A method for making a crystalline aluminosilicate zeolite catalyst having a crystal size of at least about 1 micron, a silica-to-alumina ratio of at least about 12 and a constraint index of about 1 to about 12, the step of incorporating into said zeolite catalyst a member comprising a Group 2B component, a Group 8 component and magnesium, said member having been incorporated in the order stated.
- 12. The method of claim 11 wherein the zeolite is ZSM-5.
- 13. The method of claim 11 wherein the zeolite is ZSM-11.
- 14. The method of claim 11 wherein the zeolite is ZSM-12.
- 15. The method of claim 11 wherein the zeolite is ZSM-35.
- 16. The method of claim 11 wherein the zeolite is ZSM-38.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of U.S. application Ser. No. 20,160, filed Mar. 14, 1979, now abandoned, which in turn is a divisional of U.S. application Ser. No. 896,267, filed Apr. 14, 1978 now U.S. Pat. No. 4,148,835.
US Referenced Citations (3)
Divisions (1)
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Number |
Date |
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Parent |
896267 |
Apr 1978 |
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Continuation in Parts (1)
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Number |
Date |
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Parent |
20160 |
Mar 1979 |
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