US3980726A
Expired / Lapsed
US
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Dehydrogenation with a nonacidic multimetallic catalyst
Assignee: Universal Oil Products Co
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Filing: 1974-12-20
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Granted: 1976-09-14
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Expires: 1994-12-20
Abstract
Abstract Dehydrogenatable hydrocarbons are dehydrogenated by contacting them at dehydrogenation conditions with a nonacidic catalytic composite comprising a combination of catalytically effective amounts of a platinum or palladium component, an iridium component, a tin or lead component, and an alkali or alkaline earth component with a porous carrier material. A specific example of the nonacidic, multimetallic catalytic composite disclosed herein is a combination of a platinum component, an iridium component, a tin or lead component, and an alkali or alkaline earth component with an alumina carrier material. The amounts of the catalytically active components contained in this last composite are, on an elemental basis, 0.01 to 2 wt. % platinum, 0.01 to 2 wt. % iridium, 0.01 to 5 wt. % tin or lead, and 0.1 to 5 wt. % of the alkali or alkaline earth metal.
Inventors
- 👤 John C. Hayes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:07
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/62; B01J23/622; B01J37/00; B01J37/22; C; C07; C07C; C07C5/00; C07C5/32; C07C5/321; C07C5/324; C07C5/325; C10; C10G; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
210 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbons at dehydrogenating conditions with a nonacidic 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 2 wt. % iridium, about 0.01 to about 5 wt. % tin or lead, and about 0.1 to about 5 wt. % of an alkali or alkaline earth metal, wherein the platinum or palladium, iridium, tin or lead, and alkali or alkaline earth metal are uniformly dispersed throughout the porous carrier material, wherein substantially all of the platinum or palladium and iridium are present in the corresponding elemental metallic state, wherein substantially all of the tin or lead is present in an oxidation state above that of the elemental metal, wherein substantially all of the alkali or alkaline earth metal is present in an oxidation state above that of the elemental metal, and wherein the atomic ratio of tin or lead to platinum or palladium is about 0.05:1 to about 10:1, wherein the atomic ratio of iridium to platinum or palladium is about 0.1:1 to about 2:1 and wherein the atomic ratio of the alkali or alkaline earth metal to platinum or palladium is about 5:1 to 50:1.
Claim 2
Independent Claim
210 words
A method for dehydrogenating a dehydrogenatable hydrocarbon comprising contacting the hydrocarbons at dehydrogenating conditions with a nonacidic 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 2 wt. % iridium, about 0.01 to about 5 wt. % tin or lead, and about 0.1 to about 5 wt. % of an alkali or alkaline earth metal, wherein the platinum or palladium, iridium, tin or lead, and alkali or alkaline earth metal are uniformly dispersed throughout the porous carrier material, wherein substantially all of the platinum or palladium and iridium are present in the corresponding elemental metallic state, wherein substantially all of the tin or lead is present in an oxidation state above that of the elemental metal, wherein substantially all of the alkali or alkaline earth metal is present in an oxidation state above that of the elemental metal, and wherein the atomic ratio of tin or lead to platinum or palladium is about 0.05:1 to about 10:1, wherein the atomic ratio of iridium to platinum or palladium is about 0.1:1 to about 2:1 and wherein the atomic ratio of the alkali or alkaline earth metal to platinum or palladium is about 5:1 to 50:1.
Claim 3
Dependent Claim
17 words
A method as defined in claim 1 wherein the porous carrier material is a refractory inorganic oxide.
Claim 4
Dependent Claim
14 words
A method as defined in claim 2 wherein the refractory inorganic oxide is alumina.
Claim 5
Dependent Claim
16 words
A method as defined in claim 1 wherein the alkali or alkaline earth metal is lithium.
Claim 6
Dependent Claim
16 words
A method as defined in claim 1 wherein the alkali or alkaline earth metal is potassium.
Claim 7
Dependent Claim
61 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 1 wt. % iridium, about 0.05 to about 2 wt. % tin, and about 0.25 to about 3.5 wt. % alkali or alkaline earth metal and wherein the porous carrier material is alumina.
Claim 8
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 9
Dependent Claim
23 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is an aliphatic compound containing 2 to 30 carbon atoms per molecule.
Claim 10
Dependent Claim
25 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a normal paraffin hydrocarbon containing about 4 to 30 carbon atoms per molecule.
Claim 11
Dependent Claim
26 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a normal paraffin hydrocarbon containing about 10 to about 18 carbon atoms per molecule.
Claim 12
Dependent Claim
25 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is an alkylaromatic, the alkyl group of which contains 2 to 6 carbon atoms.
Claim 13
Dependent Claim
14 words
A method as defined in claim 1 wherein the dehydrogenatable hydrocarbon is a naphthene.
Claim 14
Dependent Claim
57 words
A method as defined in claim 1 wherein the dehydrogenation conditions include a temperature of about 700° to about 1200° F., a pressure of about 0.1 to about 10 atmospheres, a liquid hourly space velocity of about 1 to 40 hr. - 1 , and a hydrogen to hydrocarbon mole ratio of about 1:1 to about 20:1.
Claim 15
Dependent Claim
19 words
A method as defined in claim 1 wherein substantially all of the tin or lead is in oxide form.
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) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |