US3112299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of catalysts from alkylene resins
Assignee: Shell USA Inc
•
Filing: 1956-06-04
•
Granted: 1963-11-26
•
Expires: 1976-06-04
Abstract
No abstract record available.
Inventors
- 👤 Edward T Borrows
- 👤 Dhafir Y Waddan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
IN A PROCESS FOR POLYMERIZING OLEFINS WHEREIN A POLYMERIZABLE MONO-OLEFINIC HYDROCARBON IS SUBJECTED TO POLYMERIZING CONDITIONS IN THE PRESENCE OF AN INERT LIQUID HYDROCARBON REACTION MEDIUM AND A POLYMERIZATION CATALYST OBTAINED BY REACTING TITANIUM TETRACHLORIDE WITH AN ORGANO-ALUMINUM COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALUMINUM TRI-ALKYLS, ALUMINUM TRI-ARYLS, DIALKYL ALUMINUM HALIDES, AND DIARYL ALUMINUM HALIDES, WHEREBY THERE IS OBTAINED A HYDROCARBON SLURRY COMPRISING SOLID POLYOLEFIN, ACTIVE CATALYST, AND SAID REACTION MEDIUM, THE STEPS OF CONTACTING SAID SLURRY WITH ESSENTIALLY DRY OXYGEN, SEPARATING SOLID POLYOLEFIN FROM THE SLURRY, AND WASHING THE POLYOLEFIN WITH AN ALCOHOL OF FROM 1 TO 4 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
104 words
IN A PROCESS FOR POLYMERIZING OLEFINS WHEREIN A POLYMERIZABLE MONO-OLEFINIC HYDROCARBON IS SUBJECTED TO POLYMERIZING CONDITIONS IN THE PRESENCE OF AN INERT LIQUID HYDROCARBON REACTION MEDIUM AND A POLYMERIZATION CATALYST OBTAINED BY REACTING TITANIUM TETRACHLORIDE WITH AN ORGANO-ALUMINUM COMPOUND SELECTED FROM THE CLASS CONSISTING OF ALUMINUM TRI-ALKYLS, ALUMINUM TRI-ARYLS, DIALKYL ALUMINUM HALIDES, AND DIARYL ALUMINUM HALIDES, WHEREBY THERE IS OBTAINED A HYDROCARBON SLURRY COMPRISING SOLID POLYOLEFIN, ACTIVE CATALYST, AND SAID REACTION MEDIUM, THE STEPS OF CONTACTING SAID SLURRY WITH ESSENTIALLY DRY OXYGEN, SEPARATING SOLID POLYOLEFIN FROM THE SLURRY, AND WASHING THE POLYOLEFIN WITH AN ALCOHOL OF FROM 1 TO 4 CARBON ATOMS PER MOLECULE.
References Cited (Backward Citations)
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Cited
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Cited
US2827445A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-11-25 | 1967-05-27 | 1967-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-25 | 1971-05-27 | 1971-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-25 | 1975-05-27 | 1975-11-26 | $7700.00 | Window Closed / Lapsed |