Patent US3903191A successfully refreshed from Google Patents.
US3903191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation of normal paraffins to obtain normal mono-olefins
Assignee: Universal Oil Products Co
•
Filing: 1970-05-01
•
Granted: 1975-09-02
•
Expires: 1990-05-01
Abstract
Abstract Normal paraffins are dehydrogenated to form normal olefins by contacting them at dehydrogenation conditions with a catalytic composite comprising a combination of a platinum group component, a rhenium component and an alkali or alkaline earth component with an alumina carrier material. A specific example of the dehydrogenation method disclosed herein is a dehydrogenation of long-chain normal paraffins with a catalyst comprising a combination of a platinum component, a rhenium component, and an alkali or alkaline earth component with an alumina carrier material in amounts sufficient to result in a catalytic composite containing, on an elemental basis, 0.01 to 1 wt. % platinum, 0.01 to 1 wt. % rhenium, and 0.01 to 5 wt. % of the alkali or alkaline earth metal.
Inventors
- 👤 Ernest L Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:13
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/14; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6567; B01J27/00; B01J27/06; B01J27/128; B01J27/13; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2705; C07C5/271; C07C5/2713; C07C5/2718; C07C5/2721; C07C5/2724; C07C5/2767; C07C5/277; C07C5/2772; C07C5/2778; C07C5/2781; C07C5/2786; C07C5/2789; C07C5/2791; C07C5/32; C07C5/327; C07C5/333; C07C5/3335; C07C5/3337; C10G35/00; C10G35/04; C10G35/06; C10G35/085; C10G35/09; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/02; C07C2523/04; C07C2523/16; C07C2523/32; C07C2523/36; C07C2523/38; C07C2523/40; C07C2523/42; C07C2523/44; C07C2523/54; C07C2523/56; C07C2523/64; C07C2523/656
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A PROCESS FOR CONVERTING A C10-C18 PARAFFIN TO THE CORRESPONDING OLEFIN WHICH COMPRISES CONTACTING SAID PARAFFIN AT DEHYDROGENATION CONDITIONS, INCLUDING A TEMPERATURE OF FROM ABOUT 700*F. TO ABOUT 1250*F., AND A PRESSURE OF FROM ABOUT 0.1 TO ABOUT 10 ATMOSPHERES, WITH A CATALYST COMPRISING ABOUT 0.01 TO ABOUT 1 WEIGHT PERCENT PLATINUM, FROM ABOUT 0.01 TO ABOUT 1 WEIGHT PERCENT RHENIUM, COMBINED HALOGEN IN AN AMOUNT LESS THAN 0.2 WEIGHT PERCENT AND ABOUT 0.01 TO ABOUT 5 WEIGHT PERCENT OF AN ALKALI OR ALKALINE EARTH METAL ASSOCIATED WITH A POROUS SOLID CARRIER.
Claim 2
Dependent Claim
92 words
A PROCESS FOR CONVERTING A C10-C18 PARAFFIN TO THE CORRESPONDING OLEFIN WHICH COMPRISES CONTACTING SAID PARAFFIN AT DEHYDROGENATION CONDITIONS, INCLUDING A TEMPERATURE OF FROM ABOUT 700*F. TO ABOUT 1250*F., AND A PRESSURE OF FROM ABOUT 0.1 TO ABOUT 10 ATMOSPHERES, WITH A CATALYST COMPRISING ABOUT 0.01 TO ABOUT 1 WEIGHT PERCENT PLATINUM, FROM ABOUT 0.01 TO ABOUT 1 WEIGHT PERCENT RHENIUM, COMBINED HALOGEN IN AN AMOUNT LESS THAN 0.2 WEIGHT PERCENT AND ABOUT 0.01 TO ABOUT 5 WEIGHT PERCENT OF AN ALKALI OR ALKALINE EARTH METAL ASSOCIATED WITH A POROUS SOLID CARRIER.
Claim 3
Dependent Claim
87 words
A process for the dehydrogenation of a C10-C18 paraffin to the corresponding olefin which comprises contacting said paraffin at a temperature of from about 700* to 1250*F. and a pressure of from about 0.1 to about 10 atmospheres with a catalyst comprising about 0.01 to about 1 weight percent platinum, about about 0.01 to about 1 weight percent rhenium, combined halogen in an amount less than 0.2 weight percent and about 0.01 to about 5 weight percent of an alkali metal associated with a porous alumina carrier.
Claim 4
Dependent Claim
87 words
A process for the dehydrogenation of a C10-C18 paraffin to the corresponding olefin which comprises contacting said paraffin at a temperature of from about 700* to 1250*F. and a pressure of from about 0.1 to about 10 atmospheres with a catalyst comprising about 0.01 to about 1 weight percent platinum, about about 0.01 to about 1 weight percent rhenium, combined halogen in an amount less than 0.2 weight percent and about 0.01 to about 5 weight percent of an alkali metal associated with a porous alumina carrier.
Claim 5
Independent Claim
106 words
A method for dehydrogenating a C10-C18 normal paraffin hydrocarbon to form the corresponding normal mono-olefin which comprises contacting said hydrocarbon at dehydrogenation conditions with a catalytic composite comprising a combination of a platinum group metal component, a rhenium component, combined halogen in an amount less than 0.2 weight percent and an alkali or alkaline earth earth metal component with an alumina carrier material, said catalytic composite containing, on an elemental basis, about 0.01 to about 1 wt. % of the platinum group metal, about 0.01 to about 1 wt. % rhenium and about 0.01 to about 5 wt. % of the alkali or alkaline earth metal.
Claim 6
Independent Claim
106 words
A method for dehydrogenating a C10-C18 normal paraffin hydrocarbon to form the corresponding normal mono-olefin which comprises contacting said hydrocarbon at dehydrogenation conditions with a catalytic composite comprising a combination of a platinum group metal component, a rhenium component, combined halogen in an amount less than 0.2 weight percent and an alkali or alkaline earth earth metal component with an alumina carrier material, said catalytic composite containing, on an elemental basis, about 0.01 to about 1 wt. % of the platinum group metal, about 0.01 to about 1 wt. % rhenium and about 0.01 to about 5 wt. % of the alkali or alkaline earth metal.
Claim 7
Dependent Claim
22 words
A method as defined in claim 3 wherein said normal paraffin hydrocarbon is admixed with hydrogen when it contacts said catalytic composite.
Claim 8
Dependent Claim
19 words
A method as defined in claim 3 wherein said platinum group component is platinum or a compound of platinum.
Claim 9
Dependent Claim
19 words
A method as defined in claim 3 wherein said platinum group component is palladium or a compound of palladium.
Claim 10
Dependent Claim
53 words
A method as defined in claim 4 wherein said dehydrogenation conditions include a temperature of about 700* to about 1250* F., a pressure of about 0.1 to about 10 atmospheres, an LHSV of about 1 to about 40 hours 1 and a hydrogen to hydrocarbon mole ratio of about 1:1 to about 20:1.
Claim 11
Dependent Claim
14 words
A method as defined in claim 3 wherein said alumina carrier material is gamma-alumina.
Claim 12
Dependent Claim
19 words
A method as defined in claim 3 wherein said alkali or alkaline earth component is a compound of lithium.
Claim 13
Dependent Claim
19 words
A method as defined in claim 3 wherein said alkali or alkaline earth component is a compound of potassium.
Claim 14
Dependent Claim
14 words
The process of claim 1 wherein said porous solid carrier is an inorganic oxide.
Claim 15
Dependent Claim
29 words
The process of claim 1 wherein said dehydrogenation process is conducted in the presence of hydrogen in a hydrogen to paraffin mole ratio of about 1:1 to about 20:1.
Claim 16
Dependent Claim
11 words
The process of claim 2 wherein said alkali metal is lithium.
References Cited (Backward Citations)
US3535402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |