Claims
- 1. A catalyst composition suitable for para-selective conversion of substituted aromatic compounds, said composition comprising a modified crystalline zeolite catalyst component characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, said composition further having incorporated thereon at least 0.25 weight percent of at least one alkaline-earth metal selected from strontium and barium, said alkaline-earth metal being present in said catalyst in the form of its oxide.
- 2. The composition of claim 1 wherein said element is strontium.
- 3. The composition of claim 2 wherein said strontium comprises between 1 and 30 weight percent of the modified zeolite catalyst composition.
- 4. The composition of claim 1 wherein said element is barium.
- 5. The composition of claim 4 wherein said barium comprises between 1 and 45 weight percent of the modified zeolite catalyst composition.
- 6. The composition of claim 1 wherein said zeolite catalyst composition has deposited thereon at least 0.25 weight percent of phosphorus in addition to said alkaline-earth metal, said phosphorus also being present in said catalyst in the form of its oxide.
- 7. The composition of claim 6 wherein said alkaline-earth metal is strontium.
- 8. The composition of claim 6 wherein said alkaline-earth metal is barium.
- 9. The composition of claim 1 wherein said zeolite is admixed with a binder therefor.
- 10. The composition of claim 1, 3, 5, 6 or 9 wherein said zeolite is selected from the group consisting of ZSM-5, ZSM-11, ZSM-12, ZSM-23, ZSM-35, ZSM-38 and ZSM-48.
- 11. The composition of claim 10 wherein said zeolite is ZSM-5.
- 12. The composition of claim 10 wherein said zeolite is ZSM-11.
BACKGROUND OF THE INVENTION
This application is a continuation-in-part of the application of CHIN-CHIUN CHU having Ser. No. 128,688, filed Mar. 10, 1980 now U.S. Pat. No. 4,288,647.
US Referenced Citations (7)
Foreign Referenced Citations (3)
Number |
Date |
Country |
14545 |
Aug 1980 |
EPX |
2357303 |
Feb 1978 |
FRX |
1574523 |
Sep 1980 |
GBX |
Continuation in Parts (1)
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Number |
Date |
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Parent |
128688 |
Mar 1980 |
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