US3720724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation cyclohexane or mono- or polyalkylcyclohexanes
Assignee: Phillips Petroleum Co
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Filing: 1970-06-03
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Granted: 1973-03-13
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Expires: 1990-06-03
Abstract
Abstract A method and catalyst for dehydrogenating cyclohexane and alkylsubstituted cyclohexanes to the corresponding aromatic compounds, the method involving contacting the cyclohexane or alkylsubstituted cyclohexane in the presence of hydrogen with a supported molybdenum-antimony catalyst.
Inventors
- 👤 D Tabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:11
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/367; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/28; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
12 words
A method of dehydrogenating cyclohexane or a substituted cyclohexane having the formula
Claim 2
Independent Claim
12 words
A method of dehydrogenating cyclohexane or a substituted cyclohexane having the formula
Claim 3
Dependent Claim
33 words
the e method of claim 1 in which said catalyst comprises from about 3 to about 15 weight percent molybdenum and about 0.1 to about 10 moles of antimony per mole of molybdenum.
Claim 4
Dependent Claim
91 words
The method of claim 2 in which methylcyclohexane is dehydrogenated to toluene by passing said methylcyclohexane and hydrogen in contact with said catalyst, said methylcyclohexane being passed in an amount of from about 0.5 to about 5 volumes of liquid methylcyclohexane per hour per volume of catalyst, and said hydrogen being passed in an amount from about 0.5 to about 10 moles of hydrogen per mole of cyclohexane at a temperature of about 600* F. to about 1,200* F. and at a pressure of from about 200 to about 1,500 psig.
Claim 5
Dependent Claim
46 words
The method of claim 1 in which methylcyclohexane is dehydrogenated to toluene by passing said methylcyclohexane in contact with a catalyst having a molybdenum content of 8.1 weight percent and an antimony content of 4.7 weight percent, said antimony and said molybdenum being deposited on alumina.
Claim 6
Dependent Claim
59 words
The method of claim 4 in which methylcyclohexane is dehydrogenated to toluene by passing methylcyclohexane in contact with said catalyst at a liquid hourly space velocity of 1, at a hydrogen flow rate of 1 mole per mole of methylcyclohexane, at a reaction temperature of 788* F., a reactor pressure of 400 psig for a period of one hour.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |