Patent US2983667A successfully refreshed from Google Patents.
US2983667A
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Process for upgrading petroleum naphthas
Assignee: ExxonMobil Oil Corp
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Filing: 1958-12-10
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Granted: 1961-05-09
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Expires: 1978-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Munns
- 👤 Claude G Myers
- 👤 Paul B Weisz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:25
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C10G; C10G59/00; C10G59/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A METHOD FOR IMPROVING THE QUALITY, OCTANE NUMBERWISE, OF A C6-CONTAINING PETROLEUM HYDROCABON MIXTURE WHICH COMPRISES SUBJECTING THE SAME TO REFORMING IN THE PRESENCE OF HYDROGEN UNDER CATALYTIC REFORMING CONDITIONS OF TEMPERATURE AND PRESSURE, SEPARATING THE RESULTING REFORMER EFFLUENT INTO (1) LIGHT GASEOUS PRODUCTS INCLUDING HYDROGEN AND C1 TO C3 HYDROCARBONS AND (2) C4 AND HEAVIER LIQUID PRODUCTS, CONDUCTING THE LATTER TO A FRACTIONATION ZONE, REMOVING AND COLLECTING A C4 FRACTION, CHARACTERIZED BY A HIGH OCTANE NUMBER, AS OVERHEAD, REMOVING AND COLLECTING C7 AND HEAVIER HYDROCARBONS AS BOTTOMS AND REMOVING AN INTERMEDIATE FRACTION CONSISTING ESSENTIALLY OF C6 HYDROCARBONS, SUBJECTING SAID INTERMEDIATE FRACTION TO DEMETHYLATION IN THE PRESENCE OF HYDROGEN UNDER CATALYTIC DEMETHYLATION CONDITIONS OF TEMPERATURE AND PRESSURE, SEPARATING THE DEMETHYLATION AND EFFLUENT INTO LIGHT GASEOUS PRODUCTS INCLUDING HYDROGEN AND C1 TO C3 HYDROCARBONS AND RECYCLING THE REMAINING LIQUID DEMETHYLATED PRODUCT TO SAID FRACTIONATION ZONE TO EX-
Claim 2
Independent Claim
146 words
A METHOD FOR IMPROVING THE QUALITY, OCTANE NUMBERWISE, OF A C6-CONTAINING PETROLEUM HYDROCABON MIXTURE WHICH COMPRISES SUBJECTING THE SAME TO REFORMING IN THE PRESENCE OF HYDROGEN UNDER CATALYTIC REFORMING CONDITIONS OF TEMPERATURE AND PRESSURE, SEPARATING THE RESULTING REFORMER EFFLUENT INTO (1) LIGHT GASEOUS PRODUCTS INCLUDING HYDROGEN AND C1 TO C3 HYDROCARBONS AND (2) C4 AND HEAVIER LIQUID PRODUCTS, CONDUCTING THE LATTER TO A FRACTIONATION ZONE, REMOVING AND COLLECTING A C4 FRACTION, CHARACTERIZED BY A HIGH OCTANE NUMBER, AS OVERHEAD, REMOVING AND COLLECTING C7 AND HEAVIER HYDROCARBONS AS BOTTOMS AND REMOVING AN INTERMEDIATE FRACTION CONSISTING ESSENTIALLY OF C6 HYDROCARBONS, SUBJECTING SAID INTERMEDIATE FRACTION TO DEMETHYLATION IN THE PRESENCE OF HYDROGEN UNDER CATALYTIC DEMETHYLATION CONDITIONS OF TEMPERATURE AND PRESSURE, SEPARATING THE DEMETHYLATION AND EFFLUENT INTO LIGHT GASEOUS PRODUCTS INCLUDING HYDROGEN AND C1 TO C3 HYDROCARBONS AND RECYCLING THE REMAINING LIQUID DEMETHYLATED PRODUCT TO SAID FRACTIONATION ZONE TO EX-
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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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |