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US4130597A
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Dehydrogenation using multimetallic catalyst
Assignee: Individual
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Filing: 1977-07-21
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Granted: 1978-12-19
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Expires: 1997-07-21
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 lead component with a porous carrier material. A specific example of the catalytic composite disclosed herein is a combination of a platinum or palladium component, a rhodium component, a lead component, and an alkali or alkaline earth component with a porous carrier material, wherein substantially all of the platinum or palladium component and the rhodium component are present therein as the corresponding elemental metals and substantially all of the lead component and the alkali or alkaline earth component are present therein in an oxidation state above the elemental metal, and wherein the composite contains about 0.01 to about 2 wt. % platinum or palladium, about 0.01 to about 2 wt. % rhodium, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal, and lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.05:1 to about 0.9:1.
Inventors
- 👤 Frederick C. Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:55
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; B01J23/628; C07C5/321; C07C5/324; C07C5/325; C07C5/367; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/46; C07C2523/54; C07C2523/56; C07C2523/62; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
128 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a non-acidic catalytic composite consisting essentially of 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 lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.05:1 to about 0.9:1, wherein substantially all of the platinum or palladium, rhodium, and lead 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 lead is present in an oxidation state above that of the elemental metal.
Claim 2
Independent Claim
128 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a non-acidic catalytic composite consisting essentially of 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 lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.05:1 to about 0.9:1, wherein substantially all of the platinum or palladium, rhodium, and lead 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 lead is present in an oxidation state above that of the elemental metal.
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
22 words
A method as defined in claim 1 wherein substantially all of the lead is present in the catalytic composite as lead oxide.
Claim 5
Dependent Claim
17 words
A method as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 6
Dependent Claim
14 words
A method as defined in claim 4 wherein the refractory inorganic oxide is alumina.
Claim 7
Dependent Claim
23 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is an aliphatic hydrocarbon containing 2 to 30 carbon atoms per molecule.
Claim 8
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 9
Dependent Claim
14 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a naphthene.
Claim 10
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 11
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, an LHSV of 1 to 40 hr. -1 , and a hydrogen to hydrocarbon mole ratio of about 1:1 to about 20:1.
Claim 12
Dependent Claim
57 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 lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.1:1 to about 0.75:1.
Claim 13
Dependent Claim
34 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.
Claim 14
Independent Claim
151 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions with a non-acidic catalytic composite consisting essentially of 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, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal, and lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.05:1 to about 0.9:1, wherein the platinum or palladium, rhodium, alkali metal or alkaline earth metal and lead 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 lead and alkali metal or alkaline earth metal are present in an oxidation state above that of the elemental metal.
Claim 15
Independent Claim
151 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions with a non-acidic catalytic composite consisting essentially of 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, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal, and lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.05:1 to about 0.9:1, wherein the platinum or palladium, rhodium, alkali metal or alkaline earth metal and lead 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 lead and alkali metal or alkaline earth metal are present in an oxidation state above that of the elemental metal.
Claim 16
Dependent Claim
17 words
A method as defined in claim 13 wherein the porous carrier material is a refractory inorganic oxide.
Claim 17
Dependent Claim
14 words
A method as defined in claim 14 wherein the refractory inorganic oxide is alumina.
Claim 18
Dependent Claim
17 words
A method as defined in claim 13 wherein the alkali metal or alkaline earth metal is potassium.
Claim 19
Dependent Claim
17 words
A method as defined in claim 13 wherein the alkali metal or alkaline earth metal is lithium.
Claim 20
Dependent Claim
22 words
A method as defined in claim 13 wherein substantially all of the lead is present in the catalytic composite as lead oxide.
Claim 21
Dependent Claim
70 words
A method as defined in claim 13 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, about 0.25 to about 3.5 wt. % alkali metal or alkaline earth metal, and lead in an amount sufficient to result in an atomic ratio of lead to platinum or palladium of about 0.1:1 to about 0.75:1.
Claim 22
Dependent Claim
48 words
A method as defined in claim 13 wherein the metals contents thereof 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 alkali metal or alkaline earth metal is about 5:1 to about 50:1.
Claim 23
Dependent Claim
21 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is admixed with hydrogen when it contacts the catalytic composite.
Claim 24
Dependent Claim
23 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is an aliphatic hydrocarbon containing 2 to 30 carbon atoms per molecule.
Claim 25
Dependent Claim
25 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is a normal paraffin hydrocarbon containing about 4 to 30 carbon atoms per molecule.
Claim 26
Dependent Claim
26 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is a normal paraffin hydrocarbon containing about 10 to about 18 carbon atoms per molecule.
Claim 27
Dependent Claim
26 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is an alkylaromatic, the alkyl group of which contains about 2 to 6 carbon atoms.
Claim 28
Dependent Claim
14 words
A method as defined in claim 13 wherein the dehydrogenatable hydrocarbon is a naphthene.
Claim 29
Dependent Claim
53 words
A method as defined in claim 21 wherein the dehydrogenation conditions include a temperature of about 700° to about 1200° F., a pressure of about 0.1 to about 10 atmospheres, an LHSV of about 1 to 40 hr. -1 , and a hydrogen to hydrocarbon mole ratio of about 1:1 to about 20:1.
Claim 30
Dependent Claim
37 words
A method as defined in claim 21 wherein the contacting is performed in the presence of water or a water-producing substance in an amount corresponding to about 50 to about 10,000 wt. ppm. based on hydrocarbon charge.
Claim 31
Dependent Claim
20 words
A method as defined in claim 13 wherein the catalytic composite contains about 0.01 to about 0.5 wt % sulfur.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-18 | 1982-06-19 | 1982-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-18 | 1986-06-19 | 1986-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-18 | 1990-06-19 | 1990-12-19 | $7700.00 | Window Closed / Lapsed |