US2979509A
Expired / Lapsed
US
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Treatment of polymers produced by alkali metal catalyzed polymerization
Assignee: Phillips Petroleum Co
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Filing: 1957-05-06
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Granted: 1961-04-11
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Expires: 1977-05-06
Abstract
No abstract record available.
Inventors
- 👤 Paul F Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:53
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; C08C2/02; C08C2/04; C08F; C08F4/00; C08F4/06; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S585/00; Y10S585/929; Y10S585/945
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
167 words
IN THE SEPARATION OF ALKALI METAL IMPURITIES FROM A POLYMER OF A CONJUGATED DIENE PREPARED BY ALKALI METAL CATALYZED POLYMERIZATION, A PROCESS COMPRISING WASHING A SOLUTION OF SAID POLYMER IN THE POLYMERIZATION SOLVENT WITH VIGOROUS AGITATION WITH WATER TO WHICH ACID HAS BEEN ADDED, THE AMOUNT OF WATER BEING SUFFICIENT TO PROVIDE A WATER TO ORGANIC RATIO OF AT LEAST 3, AT ATMOSPHERIC PRESSURE AND A TEMPERATURE IN THE RANGE OF 90* F. TO THE TEMPERATURE AT WHICH THE MIXTURE BOILS, REMOVING A PORTION OF THE MIXED AQUEOUS/ORGANIC PHASE, SEPARATING SAID PHASES, PASSING THE ORGANIC PHASE TO A SECOND AQUEOUS WASHING STEP WHEREIN THE AMOUNT OF WATER IS SUFFICIENT TO PROVIDE A WATER TO ORGANIC RATIO AT LEAST 3 AT ATMOSPHERIC PRESSURE AND A TEMPERATURE IN THE RANGE OF 90* F. TO THE BOILING POINT OF THE MIXTURE, REMOVING A PORTION OF THE MIXED AQUEOUS/ORGANIC PHASE FROM THE SECOND WASHING OPERATION, SEPARATING SAID PHASES, PASSING THE ORGANIC PHASE TO A SEPARATION ZONE, AND RECOVERING THE PURIFIED POLYMER.
Claim 2
Dependent Claim
167 words
IN THE SEPARATION OF ALKALI METAL IMPURITIES FROM A POLYMER OF A CONJUGATED DIENE PREPARED BY ALKALI METAL CATALYZED POLYMERIZATION, A PROCESS COMPRISING WASHING A SOLUTION OF SAID POLYMER IN THE POLYMERIZATION SOLVENT WITH VIGOROUS AGITATION WITH WATER TO WHICH ACID HAS BEEN ADDED, THE AMOUNT OF WATER BEING SUFFICIENT TO PROVIDE A WATER TO ORGANIC RATIO OF AT LEAST 3, AT ATMOSPHERIC PRESSURE AND A TEMPERATURE IN THE RANGE OF 90* F. TO THE TEMPERATURE AT WHICH THE MIXTURE BOILS, REMOVING A PORTION OF THE MIXED AQUEOUS/ORGANIC PHASE, SEPARATING SAID PHASES, PASSING THE ORGANIC PHASE TO A SECOND AQUEOUS WASHING STEP WHEREIN THE AMOUNT OF WATER IS SUFFICIENT TO PROVIDE A WATER TO ORGANIC RATIO AT LEAST 3 AT ATMOSPHERIC PRESSURE AND A TEMPERATURE IN THE RANGE OF 90* F. TO THE BOILING POINT OF THE MIXTURE, REMOVING A PORTION OF THE MIXED AQUEOUS/ORGANIC PHASE FROM THE SECOND WASHING OPERATION, SEPARATING SAID PHASES, PASSING THE ORGANIC PHASE TO A SEPARATION ZONE, AND RECOVERING THE PURIFIED POLYMER.
Claim 3
Dependent Claim
15 words
THE PROCESS OF CLAIM 1 WHEREIN THE POLYMER IS A COPOLYMER OF 1,3-BUTADIENE AND 2-METHYL-5-VINYLPYRIDINE.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |