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US4205017A
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Hydrodehydroxylation process using a rhenium-fluorided alumina catalyst
Assignee: Phillips Petroleum Co
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Filing: 1978-06-19
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Granted: 1980-05-27
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Expires: 1998-06-19
Abstract
Abstract Hydroxy-substituted aromatic compounds are dehydroxylated in the presence of hydrogen and a rhenium-fluorided alumina catalyst at high conversion and selectivity to dehydroxylated aromatic products.
Inventors
- 👤 Geir Bjornson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:27
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/50; B; B01; B01J; B01J23/00; B01J23/16; B01J23/32; B01J23/36; C07C1/00; C07C1/20; C07C37/48; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/32; C07C2523/36; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
56 words
A hydrodehydroxylation process which comprises contacting at least one substituted aromatic compound having at least one hydroxyl group with hydrogen in the presence of a catalyst consisting essentially of rhenium and fluorided alumina under hydrodehydroxylation conditions sufficient to dehydroxylate at least one of said aromatic compounds and produce dehydroxylated products at high conversion and high selectivity.
Claim 2
Dependent Claim
56 words
A hydrodehydroxylation process which comprises contacting at least one substituted aromatic compound having at least one hydroxyl group with hydrogen in the presence of a catalyst consisting essentially of rhenium and fluorided alumina under hydrodehydroxylation conditions sufficient to dehydroxylate at least one of said aromatic compounds and produce dehydroxylated products at high conversion and high selectivity.
Claim 3
Dependent Claim
52 words
A process according to claim 1 wherein the aromatic compound has the general formula ##STR2## wherein x is 1 to 3, y is 1 to 5, and the sum of x and y is 2 to 6, and R is hydrogen or a hydrocarbyl radical having from 1 to 6 carbon atoms.
Claim 4
Dependent Claim
65 words
A process according to claim 1 wherein the temperature of contacting is in the range of about 400°-1000° F. (204°-537° C.) and 10-800 psig (0.068-5.52 MPa) and the amount of rhenium in the catalyst ranges from 1-35 weight percent, based on the total catalyst composite, and the amount of fluorine present is in the range of 0.1 to about 80 weight percent of the alumina.
Claim 5
Dependent Claim
20 words
A process according to claim 1 wherein the feed for said contacting comprises ortho cresol, meta cresol, and para cresol.
Claim 6
Dependent Claim
30 words
A process according to claim 1 wherein the feed for said contacting comprises 2,4-xylenol and the temperature of contacting is in the range of from about 600°-800° F. (315°-426° C.).
Claim 7
Dependent Claim
34 words
A process according to claim 1 wherein the feed for said contacting comprises a mixture of ortho, meta, and para cresol and the temperature is in the range of about 600°-800° F. (315°-426° C.).
References Cited (Backward Citations)
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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) | 1983-05-27 | 1983-11-26 | 1984-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-27 | 1987-11-26 | 1988-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-27 | 1991-11-26 | 1992-05-27 | $7700.00 | Window Closed / Lapsed |