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US5559068A
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Reforming/dehydrocyclization catalysts
Assignee: Honeywell UOP LLC
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Filing: 1995-05-12
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Granted: 1996-09-24
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Expires: 2015-05-12
Abstract
Abstract Reforming is effected with a combination of a primary supported noble-metal catalyst and a catalyst containing one or more medium-pore non-zeolitic molecular sieves (MP-NZMS). The latter reforming and dehydrocyclization catalysts comprise a Group VIII metal and at least one bound MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20° C. and characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22° C. The MP-NZMS catalyst binder preferably is alumina and/or silica, and the Group VIII metal preferably is platinum.
Inventors
- 👤 Qianjun Chen
- 👤 Peter K. Coughlin
- 👤 Regis J. Pellet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:30
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/065; B; B01; B01J; B01J29/00; B01J29/82; B01J29/84; B01J29/85; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
119 words
A catalyst system comprising a physical mixture of: (a) a primary reforming catalyst comprising an effective amount of a platinum-group metal component supported on a refractory inorganic oxide; and, (b) a molecular-sieve reforming catalyst comprising amounts effective to render the catalyst active as a reforming catalyst of at least one MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20° C. and also characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22° C., an inorganic-oxide binder and at least one Group VIII metal.
Claim 2
Dependent Claim
119 words
A catalyst system comprising a physical mixture of: (a) a primary reforming catalyst comprising an effective amount of a platinum-group metal component supported on a refractory inorganic oxide; and, (b) a molecular-sieve reforming catalyst comprising amounts effective to render the catalyst active as a reforming catalyst of at least one MP-NZMS characterized in the calcined form by an adsorption of isobutane of at least 2 percent by weight at a partial pressure of 500 torr and a temperature of 20° C. and also characterized by an adsorption of triethylamine less than about 5 percent by weight at a partial pressure of 2.6 torr and a temperature of 22° C., an inorganic-oxide binder and at least one Group VIII metal.
Claim 3
Dependent Claim
22 words
The catalyst system of claim 1 wherein the adsorption of triethylamine of the MP-NZMS is less than about 3 percent by weight.
Claim 4
Dependent Claim
29 words
The catalyst system of claim 1 wherein the MP-NZMS is present in an amount of between about 1 and about 99.9 weight percent based on the total catalyst weight.
Claim 5
Dependent Claim
17 words
The catalyst system of claim 1 wherein the refractory inorganic oxide of step (a) comprises an alumina.
Claim 6
Dependent Claim
44 words
The process according to claim 1 wherein the platinum-group metal component of step (a) is present in the primary reforming catalyst on an elemental basis in an amount of between about 0.1 and 2 wt. %, based on the total weight of the catalyst.
Claim 7
Dependent Claim
40 words
The catalyst system of claim 1 wherein the primary reforming catalyst further comprises from about 0.1 to 5 wt. % of a metal promoter selected from the group consisting of one or more of rhenium, indium and Group IVA metals.
Claim 8
Dependent Claim
44 words
The catalyst system of claim 1 wherein the Group VIII metal of step (b) is present in the molecular-sieve reforming catalyst on an elemental basis in an amount of between about 0.1 and 2 wt. %, based on the total weight of the catalyst.
Claim 9
Dependent Claim
21 words
The catalyst system of claim 1 wherein the MP-NZMS is one or more selected from the group of silicoaluminophosphate molecular sieves.
Claim 10
Dependent Claim
23 words
The catalyst system of claim 8 wherein the MP-NZMS is one or more from the group consisting of SAPO-11, SAPO-31, SAPO-40 and SAPO-41.
Claim 11
Dependent Claim
13 words
The catalyst system of claim 9 wherein the MP-NZMS consists essentially of SAPO-11.
Claim 12
Dependent Claim
25 words
The catalyst system of claim 1 wherein the physical mixture of the primary and the molecular-sieve reforming catalysts is contained on the same catalyst particle.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-24 | 2000-03-25 | 2000-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-24 | 2004-03-25 | 2004-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-24 | 2008-03-25 | 2008-09-24 | $7700.00 | Window Closed / Lapsed |