Claims
- 1. A catalyst which comprises an L zeolite containing at least one Group VIII metal, which catalyst has been treated in a gaseous environment in a temperature range of from 1025.degree. to 1275.degree. F. while maintaining the water level of the effluent gas below 200 ppm.
- 2. The catalyst of claim 1, wherein the catalyst is reduced with a reducing gas prior to reaching the temperature of 1025.degree. F.
- 3. The catalyst of claim 1, wherein the catalyst is treated in the temperature range of from 1025.degree. to 1275.degree. F. in the presence of a reducing gas.
- 4. The catalyst of claim 1, wherein the catalyst has been ion exchanged with an alkali or alkaline earth metal.
- 5. The catalyst of claim 4, wherein the catalyst has been ion exchanged with sodium, cesium, rubidium, barium, strontium or calcium.
- 6. The catalyst of claim 1, which is in the potassium form or has been exchanged with barium to a degree.
- 7. The catalyst of claim 1, wherein the catalyst comprises a Group VIII metal.
- 8. The catalyst of claim 7, wherein the catalyst comprises platinum.
- 9. The catalyst of claim 8, wherein the amount of platinum is in the range of from 0.1% to 5% platinum based upon the weight of the catalyst.
- 10. The catalyst of claim 9, wherein the amount of platinum is in the range of from 0.1% to 1.5% by weight based upon the weight of the catalyst.
Parent Case Info
This application is a continuation of application Ser. No. 08/151,814, filed Nov. 15, 1993, now U.S. Pat. No. 5,382,353, which is a continuation-in-part of application Ser. No. 976,786 filed Nov. 16, 1992 now abandoned.
US Referenced Citations (4)
Continuations (1)
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Parent |
151814 |
Nov 1993 |
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Continuation in Parts (1)
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976786 |
Nov 1992 |
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