Patent US2608519A successfully refreshed from Google Patents.
US2608519A
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Desulfurization of olefinic naphtha
Assignee: Standard Oil Co
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Filing: 1949-11-29
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Granted: 1952-08-26
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Expires: 1969-11-29
Abstract
No abstract record available.
Inventors
- 👤 John F Deters
- 👤 Arthur P Lien
- 👤 Shalit Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:47
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
96 words
THE METHOD OF OBTAINING A LOW SULFUR OLEFINIC GASOLINE OF HIGH ANTI-KNOCK VALUE FROM A HIGH SULFUR OLEFINIC NAPHTHA WHICH COMPRISES EXTRACTING A NAPHTHA HAVING AN OLEFI TO PARAFFIN RATIO IN THE RANGE OF 3:1 TO 1:3 AND CONTAINING MORE THAN .25 PER CENT SULFUR WITH A DI-ALKYL FORMAMIDE UNDER CONDITIONS TO FORM AN EXTRACT PHASE CONTAINING MOST OF THE SULFUR AND A RAFFINNATE PHASE CONTAINING MOST OF THE OLEFINS, SEPARATELY REMOVING SOLVENT FROM EACH OF SAID PHASES, HYDRODESULFURIZING THE SOLVENT-FREE EXTRACT PHASE TO ELIMINATE SULFUR THEREFROM AND BLENDING THE HYDRODESULFURIZED EXTRACT WITH THE SOLVENT-FREE RAFFINATE.
Claim 2
Independent Claim
96 words
THE METHOD OF OBTAINING A LOW SULFUR OLEFINIC GASOLINE OF HIGH ANTI-KNOCK VALUE FROM A HIGH SULFUR OLEFINIC NAPHTHA WHICH COMPRISES EXTRACTING A NAPHTHA HAVING AN OLEFI TO PARAFFIN RATIO IN THE RANGE OF 3:1 TO 1:3 AND CONTAINING MORE THAN .25 PER CENT SULFUR WITH A DI-ALKYL FORMAMIDE UNDER CONDITIONS TO FORM AN EXTRACT PHASE CONTAINING MOST OF THE SULFUR AND A RAFFINNATE PHASE CONTAINING MOST OF THE OLEFINS, SEPARATELY REMOVING SOLVENT FROM EACH OF SAID PHASES, HYDRODESULFURIZING THE SOLVENT-FREE EXTRACT PHASE TO ELIMINATE SULFUR THEREFROM AND BLENDING THE HYDRODESULFURIZED EXTRACT WITH THE SOLVENT-FREE RAFFINATE.
References Cited (Backward Citations)
US2166140A
Cited
US2285696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-26 | 1956-02-25 | 1956-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-26 | 1960-02-25 | 1960-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-26 | 1964-02-25 | 1964-08-26 | $7700.00 | Window Closed / Lapsed |