US3177191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of alkali metals from hydrocarbon polymers containing same
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1961-10-26
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Granted: 1965-04-06
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Expires: 1981-10-26
Abstract
No abstract record available.
Inventors
- 👤 Vries Arthur Douwe De
- 👤 Dunlop Donald Dunwody
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:21
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/02; C08C2/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A PROCESS FOR PRODUCING POLYMERS OF CONJUGATED DIOLEFINS OF 4 TO 6 CARBON ATOMS WHEREIN THE DIOLEFINS ARE POLYMERIZED IN A POLYMERIZATION ZONE IN THE PRESENCE OF A FINELY DIVIDED ALKALI METAL CATALYST AND AN INERT SOLVENT FOR THE POLYMER AND WHEREIN THERE IS WITHDRAWN FROM SAID POLYMERIZATION ZONE A MIXTURE OF SAID SOLVENT CONTAINING POLYMER DISSOLVED THEREIN AND ALKALI METAL AND WHEREIN 1 TO 25 WT. PERCENT OF ACID CLAY, BASED ON SAID POLYMER, IS ADDED TO SAID MIXTURE AND THE RESULTING MIXTURE IS FILTERED TO REMOVE THE ALKALI METAL, THE IMPROVEMENT WHICH COMPRISES ADDING 0.1% TO 10% OF NPHTHA-INSOLUBLE GEL FORMED BY THE POLYMERIZATION OF CONJUGATED DIOLEFINS OF 4 TO 6 CARBON ATOMS TO SAID MIXTURE WITHDRAWN FROM SAID POLYMERIZATION ZONE.
Claim 2
Dependent Claim
124 words
IN A PROCESS FOR PRODUCING POLYMERS OF CONJUGATED DIOLEFINS OF 4 TO 6 CARBON ATOMS WHEREIN THE DIOLEFINS ARE POLYMERIZED IN A POLYMERIZATION ZONE IN THE PRESENCE OF A FINELY DIVIDED ALKALI METAL CATALYST AND AN INERT SOLVENT FOR THE POLYMER AND WHEREIN THERE IS WITHDRAWN FROM SAID POLYMERIZATION ZONE A MIXTURE OF SAID SOLVENT CONTAINING POLYMER DISSOLVED THEREIN AND ALKALI METAL AND WHEREIN 1 TO 25 WT. PERCENT OF ACID CLAY, BASED ON SAID POLYMER, IS ADDED TO SAID MIXTURE AND THE RESULTING MIXTURE IS FILTERED TO REMOVE THE ALKALI METAL, THE IMPROVEMENT WHICH COMPRISES ADDING 0.1% TO 10% OF NPHTHA-INSOLUBLE GEL FORMED BY THE POLYMERIZATION OF CONJUGATED DIOLEFINS OF 4 TO 6 CARBON ATOMS TO SAID MIXTURE WITHDRAWN FROM SAID POLYMERIZATION ZONE.
References Cited (Backward Citations)
US2522378A
Cited
US2862982A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |