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US4423276A
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Olefin isomerization process
Assignee: Shell USA Inc
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Filing: 1982-11-26
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Granted: 1983-12-27
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Expires: 2002-11-26
Abstract
Abstract Internal olefins in the 4 to 30 carbon number range are isomerized to alpha olefins, utilizing cyclopentadienyltantalum compounds in either a catalyst or reagent mode. Under a preferred practice of the process of this invention, internal olefin is contacted with the reagent to form a first complex, alpha olefin is liberated from said first complex upon contact with carbon monoxide to yield a second complex, and reagent is regenerated from said second complex upon contact with water.
Inventors
- 👤 Thomas H. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:36
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2562; C07C5/2581; C07C5/2587
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
66 words
A process for the isomerization of an internal olefin in the carbon number range from 4 to about 30 to an alpha olefin, which comprises steps for: (a) contacting a compound of the formula Cp 2 TaH 3 , wherein Cp represents an optionally alkyl-substituted cyclopentadienyl, indenyl, or fluorenyl radical, with the internal olefin to form a complex, and (b) liberating alpha olefin from said complex.
Claim 2
Dependent Claim
66 words
A process for the isomerization of an internal olefin in the carbon number range from 4 to about 30 to an alpha olefin, which comprises steps for: (a) contacting a compound of the formula Cp 2 TaH 3 , wherein Cp represents an optionally alkyl-substituted cyclopentadienyl, indenyl, or fluorenyl radical, with the internal olefin to form a complex, and (b) liberating alpha olefin from said complex.
Claim 3
Dependent Claim
30 words
The process of claim 1, wherein Cp represents an optionally alkyl-substituted cyclopentadienyl radical, and the alkyl substituents of the cyclopentadienyl radical each contain no more than about 10 carbon atoms.
Claim 4
Dependent Claim
18 words
The process of claim 2, wherein the alkyl substituents each contain no more than about 3 carbon atoms.
Claim 5
Dependent Claim
19 words
The process of claim 1, wherein the compound of the formula Cp 2 TaH 3 is trihydrobis(h 5 -cyclopentadienyl)tantalum.
Claim 6
Dependent Claim
28 words
The process of claim 1, wherein the liberating agent is selected from the group consisting of olefins, phosphines, hydrogen, oxygen, and the oxides of carbon, nitrogen, and sulfur.
Claim 7
Dependent Claim
28 words
The process of claim 3, wherein the liberating agent is selected from the group consisting of olefins, phosphines, hydrogen, oxygen, and the oxides of carbon, nitrogen and sulfur.
Claim 8
Dependent Claim
28 words
The process of claim 4, wherein the liberating agent is selected from the group consisting of olefins, phosphines, hydrogen, oxygen, and the oxides of carbon, nitrogen and sulfur.
Claim 9
Dependent Claim
13 words
The process of claim 1, wherein the liberating agent is an internal olefin.
Claim 10
Dependent Claim
19 words
The process of claim 1, wherein the liberating agent is oxygen or an oxide of carbon, nitrogen or sulfur.
Claim 11
Dependent Claim
13 words
The process of claim 3, wherein the liberating agent is an internal olefin.
Claim 12
Dependent Claim
19 words
The process of claim 3, wherein the liberating agent is oxygen or an oxide of carbon, nitrogen or sulfur.
Claim 13
Dependent Claim
13 words
The process of claim 4, wherein the liberating agent is an internal olefin.
Claim 14
Dependent Claim
19 words
The process of claim 4, wherein the liberating agent is oxygen or an oxide of carbon, nitrogen or sulfur.
Claim 15
Dependent Claim
93 words
A process for the isomerization of an internal olefin in the carbon number range from 4 to about 30 to an alpha olefin, which comprises steps for (a) contacting the internal olefin with a reagent of the formula Cp 2 TaH 3 , wherein Cp represents a cyclopentadienyl group or an alkyl-substituted cyclopentadienyl group, to form a first complex, (b) contacting said first complex with carbon monoxide to liberate alpha olefin therefrom and to form a second complex, and (c) contacting said second complex with water to regenerate Cp 2 TaH 3 reagent.
Claim 16
Dependent Claim
93 words
A process for the isomerization of an internal olefin in the carbon number range from 4 to about 30 to an alpha olefin, which comprises steps for (a) contacting the internal olefin with a reagent of the formula Cp 2 TaH 3 , wherein Cp represents a cyclopentadienyl group or an alkyl-substituted cyclopentadienyl group, to form a first complex, (b) contacting said first complex with carbon monoxide to liberate alpha olefin therefrom and to form a second complex, and (c) contacting said second complex with water to regenerate Cp 2 TaH 3 reagent.
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) | 1986-12-26 | 1987-06-27 | 1987-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-26 | 1991-06-27 | 1991-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-26 | 1995-06-27 | 1995-12-27 | $7700.00 | Window Closed / Lapsed |