US2965694A
Expired / Lapsed
US
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Process for isomerizing naphthas
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1959-05-12
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Granted: 1960-12-20
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Expires: 1979-05-12
Abstract
No abstract record available.
Inventors
- 👤 Stanley Hugh Erwin
- 👤 Watkins Peter Haynes
- 👤 Stringer Richard Franklin
- 👤 Sr Michael Francis Mcdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:22
CPC Classifications
C; C10; C10G; C10G35/00; C10G35/04; Y; Y10; Y10S; Y10S585/00; Y10S585/949; Y10S585/952
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
AN IMPROVED PROCESS FOR ISOMERIZING A LIGHT NAPHTHA CONTAINING PARAFFINIC HYDROCARBONS HAVING FROM 5 TO 7 CARBON ATOMS INTO MORE HIGHLY BRANCHED ISOMERS WHICH COMPRISES: SEPARATING A C5/C5 FRACTION AND A C7 FRACTION FROM SAID NAPHTHA, ISOMERIZING SAID FIRST NAMED FRACTION WITH AN ALUMINUM BROMIDE COMPRISING CATALYST IN A FIRST LIQUID PHASE ISOMERIZATION ZONE, CONTROLLING ISOMERIZATION CONDITIONS OF RESIDENCE TIME, TEMPERATURE, AND FEED RATE TO PRODUCE A PRODUCT CONTAINING NOT MORE THAN 85% ISOHEXANE, BASED ON C6 PARAFFINS, WITHDRAWING SAID PARTIALLY CONVERTED FRACTION AND CATALYST FROM SAID FIRST STAGE AND PASSING A NAPHTHENIC CRACKING STAGE ISOMERIZATION ZONE, PASSING A NAPHTHENIC CRACKING SUPPRESSOR AND AT LEAST A PORTION OF SAID C7 FRACTION TO SAID ZONE, CONTINUING SAID ISOMERIZATION PROCESS TO PRODUCE AN EQUILIBRIUM REACTION PRODUCT FROM BOTH FRACTIONS, AND RECOVERING A HIGH OCTANE PRODUCT.
Claim 2
Dependent Claim
133 words
AN IMPROVED PROCESS FOR ISOMERIZING A LIGHT NAPHTHA CONTAINING PARAFFINIC HYDROCARBONS HAVING FROM 5 TO 7 CARBON ATOMS INTO MORE HIGHLY BRANCHED ISOMERS WHICH COMPRISES: SEPARATING A C5/C5 FRACTION AND A C7 FRACTION FROM SAID NAPHTHA, ISOMERIZING SAID FIRST NAMED FRACTION WITH AN ALUMINUM BROMIDE COMPRISING CATALYST IN A FIRST LIQUID PHASE ISOMERIZATION ZONE, CONTROLLING ISOMERIZATION CONDITIONS OF RESIDENCE TIME, TEMPERATURE, AND FEED RATE TO PRODUCE A PRODUCT CONTAINING NOT MORE THAN 85% ISOHEXANE, BASED ON C6 PARAFFINS, WITHDRAWING SAID PARTIALLY CONVERTED FRACTION AND CATALYST FROM SAID FIRST STAGE AND PASSING A NAPHTHENIC CRACKING STAGE ISOMERIZATION ZONE, PASSING A NAPHTHENIC CRACKING SUPPRESSOR AND AT LEAST A PORTION OF SAID C7 FRACTION TO SAID ZONE, CONTINUING SAID ISOMERIZATION PROCESS TO PRODUCE AN EQUILIBRIUM REACTION PRODUCT FROM BOTH FRACTIONS, AND RECOVERING A HIGH OCTANE PRODUCT.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |