Patent US3192192A successfully refreshed from Google Patents.
US3192192A
Expired / Lapsed
US
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Recovery of polyolefins using a mixture of alcohol and stannic chloride
Assignee: Monsanto Co
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Filing: 1962-07-20
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Granted: 1965-06-29
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Expires: 1982-07-20
Abstract
No abstract record available.
Inventors
- 👤 Robert L Hartnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:56
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
IN A PROCESS FOR HE PRODUCION OF POLYOLEFINS BY POLYMERIZATION OF AN OLEFIN IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST COMPRISING A TITANIUM HALIDE AND AN ORGANOALUMINUM COMPOUND, SAID CATALYST BEING SUSPENDED IN AN INERT HYDROCARBON DILUENT, THE IMPROVEMENT PROVIDING FOR RECOVERY OF A POLYOLEFIN HAVING REDUCED CATALYST RESIDUES WHICH COMPRISES QUENCHING THE CATALYST AFTER POLYMERIZATION HAS TAKEN PLACE AND BEFORE ANY SUBSEQUENT REMOVAL OF THE POLYOLEFIN FROM THE REACTION MIXTURE BY ADDING TO SAID REACTION MIXTURE AN ALKYL ALCOHOL CONTAINING FROM 1 TO 8 CARBON ATOMS AND A MINOR AOUNT OF STANNIC CHLORIDE AND RECOVERING THE POLYOLEFIN FROM THE RESULTING MIXTURE.
Claim 2
Dependent Claim
105 words
IN A PROCESS FOR HE PRODUCION OF POLYOLEFINS BY POLYMERIZATION OF AN OLEFIN IN THE PRESENCE OF A CATALYTIC AMOUNT OF A CATALYST COMPRISING A TITANIUM HALIDE AND AN ORGANOALUMINUM COMPOUND, SAID CATALYST BEING SUSPENDED IN AN INERT HYDROCARBON DILUENT, THE IMPROVEMENT PROVIDING FOR RECOVERY OF A POLYOLEFIN HAVING REDUCED CATALYST RESIDUES WHICH COMPRISES QUENCHING THE CATALYST AFTER POLYMERIZATION HAS TAKEN PLACE AND BEFORE ANY SUBSEQUENT REMOVAL OF THE POLYOLEFIN FROM THE REACTION MIXTURE BY ADDING TO SAID REACTION MIXTURE AN ALKYL ALCOHOL CONTAINING FROM 1 TO 8 CARBON ATOMS AND A MINOR AOUNT OF STANNIC CHLORIDE AND RECOVERING THE POLYOLEFIN FROM THE RESULTING MIXTURE.
References Cited (Backward Citations)
CA546133A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-28 | 1968-12-28 | 1969-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-28 | 1972-12-28 | 1973-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-28 | 1976-12-28 | 1977-06-29 | $7700.00 | Window Closed / Lapsed |