US3879484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon isomerization process
Assignee: Universal Oil Products Co
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Filing: 1970-10-01
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Granted: 1975-04-22
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Expires: 1990-10-01
Abstract
Abstract Isomerizable hydrocarbons including paraffins, cycloparaffins, olefins and alkylaromatics are isomerized by contacting the hydrocarbon at isomerization conditions with a catalytic composite of alumina having combined therewith a platinum group metallic component, a halogen component and a rhenium component.
Inventors
- 👤 Ernest L Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:34
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/27; C07C5/2702; C07C5/2724; B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J37/00; B01J37/02; B01J37/22; C07C5/29; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52; Y02P20/582
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
83 words
A process for isomerizing an isomerizable alkylaromatic hydorcarbon which comprises contacting said hydrocarbon with a catalytic composite of alumina having combined therewith a platinum group metallic component, a halogen component, and a rhenium component at isomerization conditions including a temperature of about 0* C. to about 600* C., a pressure of about atmospheric to about 100 atmospheres, a liquid hourly space velocity of about 0.1 to about 20.0 hr. 1, and a hydrogen to hydrocarbon mole ratio of about 0.5:1 to about 20:1.
Claim 2
Dependent Claim
83 words
A process for isomerizing an isomerizable alkylaromatic hydorcarbon which comprises contacting said hydrocarbon with a catalytic composite of alumina having combined therewith a platinum group metallic component, a halogen component, and a rhenium component at isomerization conditions including a temperature of about 0* C. to about 600* C., a pressure of about atmospheric to about 100 atmospheres, a liquid hourly space velocity of about 0.1 to about 20.0 hr. 1, and a hydrogen to hydrocarbon mole ratio of about 0.5:1 to about 20:1.
Claim 3
Dependent Claim
80 words
A PROCESS FOR ISOMERIZING AN ISOMERIZABLE ALKYLAROMATIC HYDROCARBON WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A CATALYTIC COMPOSITE OF ALUMINA HAVING COMBINED THEREWITH A PLATINUM GROUP METALLIC COMPONENT, A HALOGEN COMPONENT, AND A RHENIUM COMPONENT AT ISOMERIZATION CONDITIONS INCLUDING A TEMPERATURE OF ABOUT 0*C. TO ABOUT 600*C., A PRESSURE OF ABOUT ATMOSPHERIC TO ABOUT 100 ATMOSPHERES, A LIQUID HOURLY SPACE VELOCITY OF ABOUT 0.1 TO ABOUT 20.0 HR.-1, AND A HYDROGEN TO HYDROCARBON MOLE RATIO OF ABOUT 0.5:1 TO ABOUT 20:1.
Claim 4
Dependent Claim
80 words
A PROCESS FOR ISOMERIZING AN ISOMERIZABLE ALKYLAROMATIC HYDROCARBON WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A CATALYTIC COMPOSITE OF ALUMINA HAVING COMBINED THEREWITH A PLATINUM GROUP METALLIC COMPONENT, A HALOGEN COMPONENT, AND A RHENIUM COMPONENT AT ISOMERIZATION CONDITIONS INCLUDING A TEMPERATURE OF ABOUT 0*C. TO ABOUT 600*C., A PRESSURE OF ABOUT ATMOSPHERIC TO ABOUT 100 ATMOSPHERES, A LIQUID HOURLY SPACE VELOCITY OF ABOUT 0.1 TO ABOUT 20.0 HR.-1, AND A HYDROGEN TO HYDROCARBON MOLE RATIO OF ABOUT 0.5:1 TO ABOUT 20:1.
Claim 5
Dependent Claim
44 words
The process of claim 1 further characterized in that said catalytic composite contains, on an elemental basis, about 0.1 to about 1.5 wt. percent chlorine, about 0.01 to about 1 wt. percent platinum group metal, and about 0.01 to about 1 wt. percent rhenium.
Claim 6
Dependent Claim
43 words
The process of claim 1 further characterized in that said catalytic composite contains, on an elemental basis, about 0.1 to about 3.5 percent fluorine, about 0.01 to about 1 wt. percent platinum group metal, and about 0.01 to about 1 wt. percent rhenium.
Claim 7
Dependent Claim
25 words
The process of claim 1 further characterized in that said platinum group component is platinum, a compound of platinum, palladium, or a compound of palladium.
Claim 8
Dependent Claim
32 words
The process of claim 1 further characterized in that said catalytic composite has a sulfur component combined therewith in an amount of about 0.05 to about 0.5 wt. Percent of the composite.
Claim 9
Dependent Claim
22 words
The process of claim 1 further characterized in that said alkylaromatic is a C8 alkylaromatic or a non-equilibrium mixture of C8 alkylaromatics.
Claim 10
Dependent Claim
21 words
The process of claim 6 further characterized in that said C8 alkylaromatic is a xylene or a mixture of non-equilibrium xylenes.
Claim 11
Dependent Claim
13 words
The process of claim 7 further characterized in that said xylene is metaxylene.
Claim 12
Dependent Claim
70 words
A process for isomerizing an alkylaromatic hydrocarbon which comprises contacting said hydrocarbon, hydrogen and a catalyst comprising about 0.01 to about 1.0 weight percent of a platinum group component, about 0.01 to about 1.0 weight percent of a rhenium component, and about 0.1 to about 5 weight percent halogen associated with an alumina carrier under isomerization conditions including a hydrogen to hydrocarbon mole ratio of from 0.5:1 to about 20:1.
Claim 13
Dependent Claim
70 words
A process for isomerizing an alkylaromatic hydrocarbon which comprises contacting said hydrocarbon, hydrogen and a catalyst comprising about 0.01 to about 1.0 weight percent of a platinum group component, about 0.01 to about 1.0 weight percent of a rhenium component, and about 0.1 to about 5 weight percent halogen associated with an alumina carrier under isomerization conditions including a hydrogen to hydrocarbon mole ratio of from 0.5:1 to about 20:1.
Claim 14
Dependent Claim
15 words
The process of claim 9 further characterized in that said platinum group component is platinum.
Claim 15
Dependent Claim
42 words
The process of claim 10 further characterized in that said isomerization conditions include a temperature from about 0* C., a pressure from about atmospheric to about 100 atmospheres and a liquid hourly space velocity from about 0.1 to about 20.0 hr. 1.
References Cited (Backward Citations)
US3415737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |