US4139570A
Expired / Lapsed
US
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Dehydrogenation of naphthene hydrocarbons
Assignee: Honeywell UOP LLC
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Filing: 1977-11-25
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Granted: 1979-02-13
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Expires: 1997-11-25
Abstract
Abstract Naphthene hydrocarbons are dehydrogenated by contacting them, at dehydrogenation conditions, with a catalytic composite comprising a combination of catalytically effective amounts of a platinum group component, a cobalt component, and a bismuth component with a porous carrier material. A specific example of the preferred nonacidic catalytic composite for use in this dehydrogenation method is a combination of a platinum group component, a cobalt component, a bismuth 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 group metal, about 0.05 to about 5 wt. % cobalt, about 0.01 to about 5 wt. % bismuth and about 0.1 to about 5 wt. & alkali metal or alkaline earth metal.
Inventors
- 👤 George J. Antos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:02
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; B; B01; B01J; B01J23/00; B01J23/70; B01J23/89; B01J23/8933; B01J23/8973; C07C5/321; C07C5/324; C07C5/325; C07C5/367; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/18; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/46; C07C2523/70; C07C2523/74; C07C2523/75; C07C2523/89; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
129 words
A method for dehydrogenating a naphthene hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a nonacidic catalytic composite consisting essentially of a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, and about 0.01 to about 5 wt. % bismuth; wherein the platinum group metal, catalytically available cobalt and bismuth are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum group metal is 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
129 words
A method for dehydrogenating a naphthene hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a nonacidic catalytic composite consisting essentially of a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, and about 0.01 to about 5 wt. % bismuth; wherein the platinum group metal, catalytically available cobalt and bismuth are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum group metal is 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 naphthene hydrocarbon is admixed with hydrogen when it contacts the catalytic composite.
Claim 4
Dependent Claim
14 words
A method as defined in claim 1 wherein the platinum group metal is platinum.
Claim 5
Dependent Claim
14 words
A method as defined in claim 1 wherein the platinum group metal is iridium.
Claim 6
Dependent Claim
14 words
A method as defined in claim 1 wherein the platinum group metal is rhodium.
Claim 7
Dependent Claim
14 words
A method as defined in claim 1 wherein the platinum group metal is palladium.
Claim 8
Dependent Claim
13 words
A method as defined in claim 1 wherein the naphthene hydrocarbon is cyclohexane.
Claim 9
Dependent Claim
17 words
A method as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 10
Dependent Claim
14 words
A method as defined in claim 8 wherein the refractory inorganic oxide is alumina.
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, a 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
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 group metal, about 0.1 to about 2.5 wt. % cobalt and about 0.05 to about 1 wt. % bismuth.
Claim 13
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 bismuth to platinum group metal is about 0.1:1 to about 2:1 and the atomic ratio of cobalt to platinum group metal is about 0.1:1 to about 66:1.
Claim 14
Dependent Claim
26 words
A method as defined in claim 1 wherein substantially all of the bismuth is present therein in an oxidation state above that of the elemental metal.
Claim 15
Dependent Claim
25 words
A method as defined in claim 13 wherein substantially all of the bismuth is present in the catalytic composite as bismuth oxide or bismuth aluminate.
Claim 16
Dependent Claim
36 words
A method as defined in claim 2 wherein substantially all of the catalytically available cobalt contained in the composite is present in the elemental metallic state after the method is started-up and linedout at dehydrogenation conditions.
Claim 17
Independent Claim
171 words
A method for dehydrogenating a naphthene hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a nonacidic catalytic composite consisting essentially of a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal, and about 0.01 to about 5 wt. % bismuth; wherein the platinum group metal, catalytically available cobalt, bismuth and alkali metal or alkaline earth metal are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum group metal is present in the elemental metallic state; 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; and wherein substantially all of the alkali metal or alkaline earth metal is present in an oxidation state above that of the elemental metal.
Claim 18
Independent Claim
171 words
A method for dehydrogenating a naphthene hydrocarbon comprising contacting the hydrocarbon, at dehydrogenation conditions, with a nonacidic catalytic composite consisting essentially of a porous carrier material containing, on an elemental basis, about 0.01 to about 2 wt. % platinum group metal, about 0.05 to about 5 wt. % cobalt, about 0.1 to about 5 wt. % alkali metal or alkaline earth metal, and about 0.01 to about 5 wt. % bismuth; wherein the platinum group metal, catalytically available cobalt, bismuth and alkali metal or alkaline earth metal are uniformly dispersed throughout the porous carrier material; wherein substantially all of the platinum group metal is present in the elemental metallic state; 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; and wherein substantially all of the alkali metal or alkaline earth metal is present in an oxidation state above that of the elemental metal.
Claim 19
Dependent Claim
17 words
A method as defined in claim 16 wherein the porous carrier material is a refractory inorganic oxide.
Claim 20
Dependent Claim
14 words
A metod as defined in claim 17 wherein the refractory inorganic oxide is alumina.
Claim 21
Dependent Claim
17 words
A method as defined in claim 16 wherein the alkali metal or alkaline earth metal is potassium.
Claim 22
Dependent Claim
17 words
A method as defined in claim 16 wherein the alkali metal or alkaline earth metal is lithium.
Claim 23
Dependent Claim
13 words
A method as defined in claim 16 wherein the naphthene hydrocarbon is cyclohexane.
Claim 24
Dependent Claim
55 words
A method as defined in claim 16 wherein the composite contains, on an elemental basis, about 0.05 to about 1 wt. % platinum group metal, about 0.1 to about 2.5 wt. % cobalt, about 0.05 to about 1 wt. % bismuth, and about 0.25 to about 3.5 wt. % alkali metal or alkaline earth metal.
Claim 25
Dependent Claim
66 words
A method as defined in claim 16 wherein the metals contents thereof is adjusted so that the atomic ratio of bismuth to platinum group metal is about 0.1:1 to about 2:1, the atomic ratio of alkali metal or alkaline earth metal to platinum group metal is about 5:1 to about 100:1 and the atomic ratio of cobalt to platinum group metal is about 0.1:1 to 66:1.
Claim 26
Dependent Claim
21 words
A method as defined in claim 16 wherein the naphthene hydrocarbon is admixed with hydrogen when it contacts the catalytic composite.
Claim 27
Dependent Claim
53 words
A method as defined in claim 24 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 28
Dependent Claim
37 words
A method as defined in claim 24 wherein the contacting is performed in the presence of water or a water-producing substance in an amount corresponding to about 1 to about 1000 wt. ppm. based on hydrocarbon charge.
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) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |