Claims
- 1. A process for the catalytic reforming of a hydrocarbon feedstock comprising contacting a combined feed comprising the hydrocarbon feedstock and free hydrogen at reforming conditions comprising a pressure of from about 100 kPa to 2 MPa, a temperature of from about 260.degree. to 560.degree. C., a liquid hourly space velocity of from about 1 to 40 hr.sup.-1, and a hydrogen to hydrocarbon ratio of from about 0.1 to 10 moles of hydrogen per mole of hydrocarbon with a catalyst system comprising a physical particle-form mixture of:
- (a) first particles of a catalytic composite comprising a non-acidic large-pore zeolite and a platinum-group metal component; and,
- (b) second acidic particles consisting essentially of two or more refractory inorganic oxides and having the substantial absence of a platinum-group metal.
- 2. The process of claim 1 wherein the hydrocarbon feedstock comprises a raffinate from aromatics extraction.
- 3. The process of claim 1 wherein the pressure is below 1 MPa.
- 4. The process of claim 1 wherein the second particles consist essentially of alumina and boria in a mass ratio respectively of from about 1:1 to 100:1.
- 5. The process of claim 1 wherein the second particles comprise silica and alumina in a mass ratio respectively of from about 20:1 to 1:100.
- 6. The process of claim 1 wherein the catalyst system further comprises particles containing one or more manganese oxides.
- 7. A process for the catalytic reforming of a hydrocarbon feedstock comprising contacting a combined feed comprising the hydrocarbon feedstock and free hydrogen at reforming conditions comprising a pressure of from about 100 kPa to 2 MPa, a temperature of from about 260.degree. to 560.degree. C., a liquid hourly space velocity of from about 1 to 40 hr.sup.-1, and a hydrogen to hydrocarbon ratio of from about 0.1 to 10 moles of hydrogen per mole of hydrocarbon with a catalyst system comprising a physical particle-form mixture of:
- (a) first particles of a catalytic composite comprising non-acidic L-zeolite, an alkali-metal component and a platinum component; and,
- (b) second particles demonstrating the presence of Bronsted acidity and consisting essentially of alumina and one or more inorganic oxides selected from the group consisting of boria, silica, titania and zirconia.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a division of prior application Ser. No. 08/735,833, filed Oct. 23, 1996now U.S. Pat. No. 5,880,051, the contents of which are incorporated herein by reference.
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DEX |
Divisions (1)
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Number |
Date |
Country |
Parent |
735833 |
Oct 1996 |
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