Patent US3190936A successfully refreshed from Google Patents.
US3190936A
Expired / Lapsed
US
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Process for regenerating an adsorbent and a catalyst support in a polymerization operation
Assignee: Texaco Inc
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Filing: 1961-02-16
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Granted: 1965-06-22
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Expires: 1981-02-16
Abstract
No abstract record available.
Inventors
- 👤 Edward T Child
- 👤 Jr William L Lafferty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:32
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
IN AN OPERATION WHEREIN NORMALLY GASEOUS OLEFINS ARE CONVERTED TO POLYMERS WHILE IN CONTACT WITH A BORON FLUORIDE CATALYST AND IN WHICH THERE IS EMPLOYED A COMPOSITION HAVING ABSORBENT PROPERTIES AND EFFECTIVE AS A SUPPORT FOR SAID CATALYST AND FOR REMOVING IMPURITIES FROM SAID POLYMERS, SAID COMPOSITION BEING SELECTED FROM THE CLASS CONSISTING OF ACTIVATED CARBON, SILICA, ALUMINA AND MIXTURES THEREOF, WHICH OPERATION RENDERS SAID COMPOSITION INEFFECTIVE BY THE OCCLUSION OF INACTIVE HALIDE COMPLEXES AND POLYMERS THEREON, THE METHOD OF REGENERATING SAID COMPOSITION WHICH COMPRISES CONTACTING SAID COMPOSITION WITH A SOLVENT MIXTURE UNTIL SUBSTANTIALLY ALL OF SAID OCCLUDED COMPLEXES AND POLYMERS ARE REMOVED THEREBY REGENERATING SAID COMPOSITION, SAID SOLVENT CONSISTING OF PENTANE AND ACETONE IN THE PROPORTIONS OF 1:4 TO 4:1 RESPECTIVELY ON A WEIGHT BASIS.
Claim 2
Dependent Claim
126 words
IN AN OPERATION WHEREIN NORMALLY GASEOUS OLEFINS ARE CONVERTED TO POLYMERS WHILE IN CONTACT WITH A BORON FLUORIDE CATALYST AND IN WHICH THERE IS EMPLOYED A COMPOSITION HAVING ABSORBENT PROPERTIES AND EFFECTIVE AS A SUPPORT FOR SAID CATALYST AND FOR REMOVING IMPURITIES FROM SAID POLYMERS, SAID COMPOSITION BEING SELECTED FROM THE CLASS CONSISTING OF ACTIVATED CARBON, SILICA, ALUMINA AND MIXTURES THEREOF, WHICH OPERATION RENDERS SAID COMPOSITION INEFFECTIVE BY THE OCCLUSION OF INACTIVE HALIDE COMPLEXES AND POLYMERS THEREON, THE METHOD OF REGENERATING SAID COMPOSITION WHICH COMPRISES CONTACTING SAID COMPOSITION WITH A SOLVENT MIXTURE UNTIL SUBSTANTIALLY ALL OF SAID OCCLUDED COMPLEXES AND POLYMERS ARE REMOVED THEREBY REGENERATING SAID COMPOSITION, SAID SOLVENT CONSISTING OF PENTANE AND ACETONE IN THE PROPORTIONS OF 1:4 TO 4:1 RESPECTIVELY ON A WEIGHT BASIS.
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |