US2636843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cracked naphtha desulfurization
Assignee: Standard Oil Co
•
Filing: 1950-10-09
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Granted: 1953-04-28
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Expires: 1970-10-09
Abstract
No abstract record available.
Inventors
- 👤 Robert C Arnold
- 👤 Arthur P Lien
- 👤 John F Deters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:23
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
THE METHOD OF DESULFURIZING A CRACKED NAPHTHA BOILING CHIEFLY IN THE RANGE OF ABOUT 150 TO 400*F. AND CONTAINING AT LEAST ABOUT .2% SULFUR, WHICH METHOD COMPRISES TOPPING SAID CRACKED NAPHTHA TO REMOVE AS A FIRST OVERHEAD STREAM COMPONENTS LOWER BOILING THAN ABOUT 270*F., ACID TREATING THE BOTTOMS FROM THE TOPPING STEP WITH SULFURIC ACID UNDER CONDITIONS FOR EFFECTING SUBSTANTIAL DESULFURIZATION AND THE PRODUCTION OF COMPONENTS BOILING ABOVE 400*F., SEPARATING SLUDGE FORMED IN THE ACID TREATING STEP, RERUNNING THE ACID TREATED NAPHTHA TO OBTAIN A SECOND OVERHEAD STREAM CONSISTING ESSENTIALLY OF GASOLINE BOILING RANGE COMPONENTS AND HIGHER BOILING OIL FORMED IN THE ACID TREATING STEP, HYDRODESULFURIZING SAID HIGHER BOILING OIL
References Cited (Backward Citations)
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Cited
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Cited
US2070295A
Cited
US2219109A
Cited
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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) | 1956-04-27 | 1956-10-27 | 1957-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-27 | 1960-10-27 | 1961-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-27 | 1964-10-27 | 1965-04-28 | $7700.00 | Window Closed / Lapsed |