US2638438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of naphthas
Assignee: Standard Oil Development Co
•
Filing: 1950-09-01
•
Granted: 1953-05-12
•
Expires: 1970-09-01
Abstract
No abstract record available.
Inventors
- 👤 Edward J Hoffmann
- 👤 Edward F Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A METHOD FOR HYDROGENATING A NAPHTHA FRACTION BOILING IN THE GASOLINE RANGE CONTAINING MONO- AND DIOLEFINS WHEREIN THE DIOLEFINS ARE HYDROGENATED SELECTIVELY WHICH COMPRISES ADDING TO SAID NAPHTHA FRACTION A CAUSTIC SOLUBLE ORGANIC SULFUR COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE ALIPHATIC MERCAPTANS HAVING FROM 1 TO 4 CARBON ATOMS IN THE MOLECULE AND THE THIOPHENOLS BOILING UP TO 450* F. IN AN AMOUNT IN THE RANGE FROM 0.1% TO 1.0% BY WEIGHT BASED ON SAID NAPHTHA, CONTACTING THE NAPHTHA TO WHICH THE ORGANIC SULFUR COMPOUND HAS BEEN ADDED WITH A SULFUR INSENSITIVE HYDROGENATION CATALYST AT A TEMPERATURE IN THE RANGE BETWEEN 400* AND 600* F. AND AT A PRESSURE BETWEEN 45 AND 500 P. S. I. G. IN THE PRESENCE OF HYDROGEN UNDER CONDITIONS TO CAUSE SELECTIVE HYDROGENATION OF SAID DIOLEFINS TO THE SUBSTANTIAL EXCLUSION OF HYDROGENATION OF SAID MONO-OLEFINS TO FORM A
Claim 2
Independent Claim
145 words
A METHOD FOR HYDROGENATING A NAPHTHA FRACTION BOILING IN THE GASOLINE RANGE CONTAINING MONO- AND DIOLEFINS WHEREIN THE DIOLEFINS ARE HYDROGENATED SELECTIVELY WHICH COMPRISES ADDING TO SAID NAPHTHA FRACTION A CAUSTIC SOLUBLE ORGANIC SULFUR COMPOUND SELECTED FROM THE CLASS CONSISTING OF THE ALIPHATIC MERCAPTANS HAVING FROM 1 TO 4 CARBON ATOMS IN THE MOLECULE AND THE THIOPHENOLS BOILING UP TO 450* F. IN AN AMOUNT IN THE RANGE FROM 0.1% TO 1.0% BY WEIGHT BASED ON SAID NAPHTHA, CONTACTING THE NAPHTHA TO WHICH THE ORGANIC SULFUR COMPOUND HAS BEEN ADDED WITH A SULFUR INSENSITIVE HYDROGENATION CATALYST AT A TEMPERATURE IN THE RANGE BETWEEN 400* AND 600* F. AND AT A PRESSURE BETWEEN 45 AND 500 P. S. I. G. IN THE PRESENCE OF HYDROGEN UNDER CONDITIONS TO CAUSE SELECTIVE HYDROGENATION OF SAID DIOLEFINS TO THE SUBSTANTIAL EXCLUSION OF HYDROGENATION OF SAID MONO-OLEFINS TO FORM A
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) | 1956-05-11 | 1956-11-10 | 1957-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-11 | 1960-11-10 | 1961-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-11 | 1964-11-10 | 1965-05-12 | $7700.00 | Window Closed / Lapsed |