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US4101593A
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Dehydrogenation method and nonacidic multimetallic catalytic composite for use therein
Assignee: Honeywell UOP LLC
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Filing: 1977-03-25
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Granted: 1978-07-18
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Expires: 1997-03-25
Abstract
Abstract Dehydrogenatable hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum or palladium component, a rhodium component and a cobalt component with a porous carrier material. A specific example of the nonacidic catalytic composite disclosed herein is a combination of a platinum or palladium component, a rhodium component, a cobalt component, and an alkali or alkaline earth component with a porous carrier material in amounts sufficient to result in a composite containing about 0.01 to about 2 wt. % platinum or palladium, about 0.01 to about 2 wt. % rhodium, about 0.05 to about 5 wt. % cobalt and about 0.1 to about 5 wt. % alkali metal or alkaline earth metal. A preferred modifying component for the disclosed catalytic composites is a Group IVA metallic component.
Inventors
- 👤 John C. Hayes
- 👤 Ernest L. Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:26
CPC Classifications
C; C10; C10G; C10G45/00; C10G45/58; C10G45/60; C10G45/62; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8913; B01J23/8933; B01J23/8966; B01J27/00; B01J27/06; B01J27/08; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C5/32; C07C5/321; C07C5/324; C07C5/325; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; C07C5/367; C07C5/373; C07C5/393; C07C5/41; C07C5/415; C07C5/417; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; C10G45/44; C10G45/46; C10G45/52; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/14; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/89; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906; Y10S585/949; Y10S585/951
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
128 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a catalytic composite comprising a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum or palladium, about 0.01 to about 2 wt. % rhodium, and about 0.05 to about 5 wt. % cobalt; wherein the platinum or palladium, rhodium and catalytically available cobalt are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum or palladium and rhodium are present in the elemental metallic state; and wherein substantially all of the catalytically available cobalt is present in the elemental metallic state or in a state which is reducible to the elemental metallic state under dehydrogenation conditions or in a mixture of these states.
Claim 2
Independent Claim
128 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a catalytic composite comprising a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum or palladium, about 0.01 to about 2 wt. % rhodium, and about 0.05 to about 5 wt. % cobalt; wherein the platinum or palladium, rhodium and catalytically available cobalt are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum or palladium and rhodium are present in the elemental metallic state; and wherein substantially all of the catalytically available cobalt is present in the elemental metallic state or in a state which is reducible to the elemental metallic state under dehydrogenation conditions or in a mixture of these states.
Claim 3
Dependent Claim
21 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is admixed with hydrogen when it contacts the catalytic composite.
Claim 4
Dependent Claim
17 words
A method as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 5
Dependent Claim
14 words
A method as defined in claim 3 wherein the refractory inorganic oxide is alumina.
Claim 6
Dependent Claim
24 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a normal paraffin hydrocarbon containing 4 to 30 carbon atoms per molecule.
Claim 7
Dependent Claim
14 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a naphthene.
Claim 8
Dependent Claim
26 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is an alkylaromatic, the alkyl group of which contains about 2 to 6 carbon atoms.
Claim 9
Dependent Claim
49 words
A method as defined in claim 2 wherein the dehydrogenation conditions include a temperature of 700° to about 1200° F., a pressure of 0.1 to 10 atmospheres, a LHSV of 1 to 40 hr. -1 , and a hydrogen to hydrocarbon mole ratio of about 1:1 to about 20:1.
Claim 10
Dependent Claim
42 words
A method as defined in claim 1 wherein the composite contains, on an elemental basis, about 0.05 to about 1 wt. % platinum or palladium, about 0.05 to about 1 wt. % rhodium and about 0.1 to about 2.5 wt. % cobalt.
Claim 11
Dependent Claim
50 words
A method as defined in claim 1 wherein the metals content of the catalytic composite is adjusted so that the atomic ratio of rhodium to platinum or palladium is about 0.1:1 to about 2:1 and the atomic ratio of cobalt to platinum or palladium is about 0.1:1 to about 66:1.
Claim 12
Dependent Claim
48 words
A method as defined in claim 1 wherein the catalytic composite contains, on an elemental basis, about 0.01 to about 5 wt. % Group IVA metal and wherein substantially all of the Group IVA metal is present in an oxidation state above that of the corresponding elemental metal.
Claim 13
Dependent Claim
14 words
A method as defined in claim 11 wherein the Group IVA metal is germanium.
Claim 14
Dependent Claim
14 words
A method as defined in claim 11 wherein the Group IVA metal is tin.
Claim 15
Dependent Claim
14 words
A method as defined in claim 11 wherein the Group IVA metal is lead.
Claim 16
Dependent Claim
32 words
A method as defined in claim 2 wherein substantially all of the catalytically available cobalt is present in the elemental metallic state after the method is started-up and lined-out at dehydrogenation conditions.
Claim 17
Dependent Claim
19 words
A method as defined in claim 1 wherein the catalytic composite is prepared and maintained in a sulfur-free state.
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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) | 1981-07-17 | 1982-01-16 | 1982-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-17 | 1986-01-16 | 1986-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-17 | 1990-01-16 | 1990-07-18 | $7700.00 | Window Closed / Lapsed |