Patent US3173968A successfully refreshed from Google Patents.
US3173968A
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Process for separating olefins
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1962-08-20
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Granted: 1965-03-16
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Expires: 1982-08-20
Abstract
No abstract record available.
Inventors
- 👤 William R Edwards
- 👤 Robert D Wesselhoft
- 👤 Bert B Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:37
CPC Classifications
C; C07; C07C; C07C11/00; C07C11/02; C07C11/107; C07C11/113; C07C5/00; C07C5/22; C07C5/23; C07C5/25; C07C5/2506; C07C5/2525; C07C5/2531
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A METHOD WHICH COMPRISES FRACTIONATING A HYDROCARBON STREAM CONTAINING 3-METHYLPENTENE-1, 4-METHYLPENTENE-1, METHYL CYCLOPENTANE AND 2,3-DIMETHYLBUTENE-1 TO OBTAIN A HYDROCARBON MIXTURE BOILING WITHIN THE RANGE OF ABOUT 122*F. TO ABOUT 136*F., CONTACTING SAID HYDROCARBON MIXTURE WITH SULFURIC ACID HAVING A CONCENTRATION BY WEIGHT WITHIN THE RANGE FROM ABOUT 65% TO ABOUT 75%, AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 20* F. TO ABOUT 100*F., AND FOR A TIME WITHIN THE RANGE FROM ABOUT 5 MINUTES TO ABOUT 4 HOURS, WHEREBY SAID 2,3-DIMETHYLBUTENE-1 IS ISOMERIZED SELECTIVELY INTO 2,3-DIMETHYLBUTENE-2, SEPARATING SAID CONTACTED HYDROCARBON MIXTURE FROM SAID ACID, AND FRACTIONATING SAID CONTACTED HYDROCARBON MIXTURE TO RECOVER AN ADMIXTURE OF 3-METHYLPENTENE-1 AND 4-METHYLPENTENE-1 AS A FIRST PRODUCT STREAM, AND 2,3-DIMETHYLBUTENE-2 AS A SECOND PRODUCT STREAM.
Claim 2
Independent Claim
121 words
A METHOD WHICH COMPRISES FRACTIONATING A HYDROCARBON STREAM CONTAINING 3-METHYLPENTENE-1, 4-METHYLPENTENE-1, METHYL CYCLOPENTANE AND 2,3-DIMETHYLBUTENE-1 TO OBTAIN A HYDROCARBON MIXTURE BOILING WITHIN THE RANGE OF ABOUT 122*F. TO ABOUT 136*F., CONTACTING SAID HYDROCARBON MIXTURE WITH SULFURIC ACID HAVING A CONCENTRATION BY WEIGHT WITHIN THE RANGE FROM ABOUT 65% TO ABOUT 75%, AT A TEMPERATURE WITHIN THE RANGE FROM ABOUT 20* F. TO ABOUT 100*F., AND FOR A TIME WITHIN THE RANGE FROM ABOUT 5 MINUTES TO ABOUT 4 HOURS, WHEREBY SAID 2,3-DIMETHYLBUTENE-1 IS ISOMERIZED SELECTIVELY INTO 2,3-DIMETHYLBUTENE-2, SEPARATING SAID CONTACTED HYDROCARBON MIXTURE FROM SAID ACID, AND FRACTIONATING SAID CONTACTED HYDROCARBON MIXTURE TO RECOVER AN ADMIXTURE OF 3-METHYLPENTENE-1 AND 4-METHYLPENTENE-1 AS A FIRST PRODUCT STREAM, AND 2,3-DIMETHYLBUTENE-2 AS A SECOND PRODUCT STREAM.
References Cited (Backward Citations)
US2463873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-15 | 1968-09-14 | 1969-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-15 | 1972-09-14 | 1973-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-15 | 1976-09-14 | 1977-03-16 | $7700.00 | Window Closed / Lapsed |