US4338173A
Expired / Lapsed
US
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Catalytic isomerization process using photo-induced deligandation
Assignee: Honeywell International Inc
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Filing: 1980-06-23
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Granted: 1982-07-06
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Expires: 2000-06-23
Abstract
Abstract A process is provided for inducing a catalytic isomerization reaction. The process involves exposing to optical radiation a gaseous mixture including a reactant unsaturated hydrocarbon and a compound of a transition metal and a ligand. The gaseous transition metal compound is preferably a transition metal carbonyl.
Inventors
- 👤 James T. Yardley
- 👤 Alan M. Rosan
- 👤 Eva L. Menger-Hammond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:17
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/22; C07C5/2206; C07C5/23; C07C5/25; C07C5/2506; C07C2531/00; C07C2531/16; C07C2531/20; Y; Y10; Y10S; Y10S204/00; Y10S204/90
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
38 words
A process for inducing a catalytic isomerization reaction in a reactant gas comprising an unsaturated hydrocarbon, which comprises exposing the gas to optical radiation in the presence of a gaseous compound comprising a transition metal and a ligand.
Claim 2
Dependent Claim
38 words
A process for inducing a catalytic isomerization reaction in a reactant gas comprising an unsaturated hydrocarbon, which comprises exposing the gas to optical radiation in the presence of a gaseous compound comprising a transition metal and a ligand.
Claim 3
Dependent Claim
83 words
The process of claim 1 wherein the unsaturated hydrocarbon has the formula: ##STR2## wherein the R 1 through R 5 groups are independently selected from the group consisting of hydrogen, hydroxyl; alkyl, straight chain, branched or cyclic, having 1 to 7 carbon atoms, and optionally substituted by halogen or nitrile; alkenyl, mono- and di-unsaturated, straight chain or branched, having 1 to 7 carbon atoms; alkynyl, mono- and di-substituted, having 1-7 carbon atoms; and phenyl and substituted phenyls, having 7 or fewer carbon atoms.
Claim 4
Dependent Claim
12 words
The process of claim 2 wherein the unsaturated hydrocarbon is an olefin.
Claim 5
Dependent Claim
11 words
The process of claim 2 wherein the unsaturated hydrocarbon is 1,4-pentadiene.
Claim 6
Dependent Claim
23 words
The process of claim 1 wherein the transition metal is bound to the ligand with a bond energy less than about 400 kJ/mole.
Claim 7
Dependent Claim
23 words
The process of claim 5 wherein the transition metal is bound to the ligand with a bond energy less than about 200 kJ/mole.
Claim 8
Dependent Claim
92 words
The process of claim 1 wherein the ligand is selected from the group consisting of hydrogen, halogen, nitrile; isonitrile, having 1-4 carbon atoms and optionally substituted by halogen; alkyl, straight chain or branched, having 1-4 carbon atoms and optionally substituted by halogen; alkoxy, having 1-4 carbon atoms and optionally substituted by halogen; mono- and di-unsaturated olefins, internal or terminal, having 1-4 carbon atoms and optionally substituted by halogen; cyclic di- and tri-olefins, having 1-7 carbon atoms; phenyl, optionally substituted by halogen; allyl, trifluorophosphine, carbon monoxide, ammonia, nitric oxide, nitrogen, and combinations thereof.
Claim 9
Dependent Claim
10 words
The process of claim 7 wherein the ligand is CO.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein the transition metal is selected from the group consisting of group VIB and group VIII metals.
Claim 11
Dependent Claim
13 words
The process of claim 9 wherein the gaseous compound is Cr(CO) 6 .
Claim 12
Dependent Claim
13 words
The process of claim 9 wherein the gaseous compound is Fe(CO) 5 .
Claim 13
Dependent Claim
15 words
The process of claim 1 wherein the optical radiation is provided by a pulsed source.
Claim 14
Dependent Claim
37 words
The process of claim 12 wherein the radiation fluence is chosen so that the probability of a molecule of the transition metal compound absorbing more than one photon from a single pulse is substantially less than one.
Claim 15
Dependent Claim
15 words
The process of claim 1 wherein the optical radiation is provided by a continuous source.
Claim 16
Dependent Claim
34 words
The process of claim 14 wherein the radiation intensity is chosen so that the probability of a fragment or intermediate generated from the transition metal compound absorbing a photon is substantially less than one.
Claim 17
Dependent Claim
18 words
The process of claim 1 wherein the optical radiation is in the ultraviolet region of the electromagnetic spectrum.
Claim 18
Dependent Claim
16 words
The process of claim 16 wherein the optical radiation is provided by a mercury arc lamp.
Claim 19
Dependent Claim
14 words
The process of claim 1 wherein the optical radiation is provided by a laser.
Claim 20
Dependent Claim
15 words
The process of claim 18 wherein the optical radiation is provided by a KrF laser.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |