US3340319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective polymerization of isobutene
Assignee: Phillips Petroleum Co
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Filing: 1964-05-18
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Granted: 1967-09-05
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Expires: 1984-05-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:30
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C7/00; C07C7/148; C07C7/177; C07C2521/00; C07C2521/06; C07C2521/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A PROCESS FOR SEPARATING ISOBUTENE FROM A FEED STREAM CONTAINING ISOBUTENE IN ADMIXTURE WITH A SUBSTANTIAL PROPORTION OF N-BUTENE WHICH COMPRISES THE STEPS OF; (1) CONTACTING SAID FEED STREAM WITH A FLUORIDE SILICA CATALYST CONTAINING AN AMOUNT OF A FLUORINE RESIDUE IN THE RANGE OF 0.1 TO 20 WEIGHT PERCENT OF THE SILICA IN A POLYMERIZING ZONE; (2) MAINTAINING ISOBUTENE POLYMERIZING CONDITIONS IN SAID ZONE SO AS TO SELECTIVELY POLYMERIZE ISOBUTENE, SAID CONDITIONS INCLUDING A TEMPERATURE IN THE RANGE OF 0 TO 350*F.; AND (3) SEPARATING RESULTING POLYMER FROM THE REACTION EFFLUENT TO PROVIDE AN N-BUTENE STREAM OF SUBSTANTIALLY LOWER ISOBUTENE CONTENT THAN SAID FEED.
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) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |