US2934573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cyclohexane
Assignee: Ashland LLC
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Filing: 1957-02-06
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Granted: 1960-04-26
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Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Thorwell H Paulsen
- 👤 Charles D Hoertz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:24
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/02; C07C5/10; C07C2601/00; C07C2601/12; C07C2601/14; Y; Y10; Y10S; Y10S585/00; Y10S585/909; Y10S585/911; Y10S585/914
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
IN CONJUNCTION WITH THE CATALYTIC REFORMING OF A PETROLEUM HYDROCARBON WHEREIN AN OFF-GAS IS FORMED CONSISTING PRINCIPALLY OF HYDROGEN BUT ALSO CONTAINING ACIDIC SULFUR COMPOUNDS, THE METHOD WHICH COMPRISES REMOVING SULFUR COMPOUNDS FROM THE SAID HYDROGEN GAS UNTIL THE ACIDIC SULFUR CONTENT THEREOF DOES NOT EXCEED SUBSTANTIALLY 10 PARTS PER MILLION, THEN COMMINGLING SUBSTANTIALLY PURE BENZENE IN LIQUID STATE WITH THE SAID HYDROGEN GAS AND HEATING THE MIXTURE TO A TEMPERATURE OF APPROXIMATELY 90-100*F., PASSING THE HEATED MIXTURE, IN A SINGLE PASS INTO AND OUT OF CONTACT WITH A HYDROGENATION CATALYST WHEREBY CYCLOHEXANE IS FORMED AND WHEREBY EXOTHERMIC HEAT IS ABSORBED FROM THE SITE OF REACTION THROUGH VAPORIZATION OF THE BENZENE FROM ITS LIQUID STATE, AND ABSORBING ADDITIONAL HEAT FROM THE SITE OF REACTION TO MAINTAIN A PEAK TEMPERATURE BELOW APPROXIMATELY 500*F.
Claim 2
Dependent Claim
132 words
IN CONJUNCTION WITH THE CATALYTIC REFORMING OF A PETROLEUM HYDROCARBON WHEREIN AN OFF-GAS IS FORMED CONSISTING PRINCIPALLY OF HYDROGEN BUT ALSO CONTAINING ACIDIC SULFUR COMPOUNDS, THE METHOD WHICH COMPRISES REMOVING SULFUR COMPOUNDS FROM THE SAID HYDROGEN GAS UNTIL THE ACIDIC SULFUR CONTENT THEREOF DOES NOT EXCEED SUBSTANTIALLY 10 PARTS PER MILLION, THEN COMMINGLING SUBSTANTIALLY PURE BENZENE IN LIQUID STATE WITH THE SAID HYDROGEN GAS AND HEATING THE MIXTURE TO A TEMPERATURE OF APPROXIMATELY 90-100*F., PASSING THE HEATED MIXTURE, IN A SINGLE PASS INTO AND OUT OF CONTACT WITH A HYDROGENATION CATALYST WHEREBY CYCLOHEXANE IS FORMED AND WHEREBY EXOTHERMIC HEAT IS ABSORBED FROM THE SITE OF REACTION THROUGH VAPORIZATION OF THE BENZENE FROM ITS LIQUID STATE, AND ABSORBING ADDITIONAL HEAT FROM THE SITE OF REACTION TO MAINTAIN A PEAK TEMPERATURE BELOW APPROXIMATELY 500*F.
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) | 1963-04-26 | 1963-10-26 | 1964-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-26 | 1967-10-26 | 1968-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-26 | 1971-10-26 | 1972-04-26 | $7700.00 | Window Closed / Lapsed |