US3094481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrofining process with temperature control
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1960-09-09
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Granted: 1963-06-18
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Expires: 1980-09-09
Abstract
No abstract record available.
Inventors
- 👤 Roger M Butler
- 👤 John A Bichard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:45
CPC Classifications
C; C10; C10G; C10G69/00; C10G69/02; C10G69/08; C10G49/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A METHOD FOR CATAYLSTICALLY HYDROGENATING NAPHTHA FEEDSTOCKS WHICH TEND TO FORM DEPOSITE UPON HEAT TRANSFER SURFACES WHEN HEATED TO TEMPERATURES ABOVE ABOUT 300*F. WHICH COMPRISES HYDROGENATING THE FEED AT ELEVATED TEMPERATURE AND PRESSURE TO IMPROVE THE STABILITY OF THE NAPHTHA, SEPARATING THE HYDROGENATED LIQUID PRODUCT FROM THE ACCOMPANYING GASES, PREHEATING A PORTION OF THE HYDROGENATED LIQUID PRODUCT TO A TEMPERATURE OF ABOUT 900-1000*F., MIXING THE PREHEATED HYDROGENATED PRODUCT WITH NAPHTHA FEED AT A TEMPERATURE SUBSTANTIALLY BELOW 300*F. IN SUFFICIENT AMOUNT THAT THE RESULTANT MIXTURE MAY BE CHARGED DIRECTLY TO THE HYDROGENATING STEP WITHOUT FURTHER HEATING.
Claim 2
Independent Claim
95 words
A METHOD FOR CATAYLSTICALLY HYDROGENATING NAPHTHA FEEDSTOCKS WHICH TEND TO FORM DEPOSITE UPON HEAT TRANSFER SURFACES WHEN HEATED TO TEMPERATURES ABOVE ABOUT 300*F. WHICH COMPRISES HYDROGENATING THE FEED AT ELEVATED TEMPERATURE AND PRESSURE TO IMPROVE THE STABILITY OF THE NAPHTHA, SEPARATING THE HYDROGENATED LIQUID PRODUCT FROM THE ACCOMPANYING GASES, PREHEATING A PORTION OF THE HYDROGENATED LIQUID PRODUCT TO A TEMPERATURE OF ABOUT 900-1000*F., MIXING THE PREHEATED HYDROGENATED PRODUCT WITH NAPHTHA FEED AT A TEMPERATURE SUBSTANTIALLY BELOW 300*F. IN SUFFICIENT AMOUNT THAT THE RESULTANT MIXTURE MAY BE CHARGED DIRECTLY TO THE HYDROGENATING STEP WITHOUT FURTHER HEATING.
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) | 1966-06-17 | 1966-12-17 | 1967-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-17 | 1970-12-17 | 1971-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-17 | 1974-12-17 | 1975-06-18 | $7700.00 | Window Closed / Lapsed |