US3207740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propylene polymerization by titanium trichloride, aluminum dialkyl halide and water
Assignee: Shell USA Inc
•
Filing: 1963-05-27
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Granted: 1965-09-21
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Expires: 1983-05-27
Abstract
No abstract record available.
Inventors
- 👤 Harry A Cheney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:14
CPC Classifications
C; C08; C08F; C08F10/00; C08F10/04; C08F10/06; Y; Y10; Y10S; Y10S526/00; Y10S526/905; Y10S526/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A CONTINUOUS PROCESS FOR PRODUCING HIGHLY CRYSTALLINE POLYPROPYLENE WHICH COMPRISES (1) PREPARING A REACTION MIXTURE COMPRISING (A) LIQUID NON-REACTIVE HYDROCARBON DILUENT, (B) PROPYLENE AND POLYMER RESULTING FROM ITS POLYMERIZATION, AND, (C) A CATALYST FORMED FROM BETWEEN 25P.P.M. AND 1% BY WEIGHT OF TITANIUM TRICHLORIDE AND THE PRODUCT FORMED DURING NO MORE THAN 1 MINUTE OF CONTACT OF AN ALUMINUM DIALKYL HALIDE WITH FROM 0.09 TO 1 MOLE OF WATER PER MOLE OF ALUMINUM DIALKYL HALIDE, THE MOLAR RATIO OF AL:TI BEING BETWEEN ABOUT 1:1 AND ABOUT 5:1; (2) MAINTAINING SAID REACTION MIXTURE AT A TEMPERATURE IN THE RANGE FROM 0*C. TO 120C.; (3) CONTINUOUSLY ADDING TO SAID REACTION MIXTURE ADDITIONAL DILUENT, PROPYLENE, AND CATALYST INGREDIENTS; AND (4) CONTINUOUSLY WITHDRAWING A PORTION OF SAID REACTION MIXTURE DEACTIVATING CATALYST THEREIN, AND RECOVERING POLYMER THEREFROM.
Claim 2
Dependent Claim
132 words
A CONTINUOUS PROCESS FOR PRODUCING HIGHLY CRYSTALLINE POLYPROPYLENE WHICH COMPRISES (1) PREPARING A REACTION MIXTURE COMPRISING (A) LIQUID NON-REACTIVE HYDROCARBON DILUENT, (B) PROPYLENE AND POLYMER RESULTING FROM ITS POLYMERIZATION, AND, (C) A CATALYST FORMED FROM BETWEEN 25P.P.M. AND 1% BY WEIGHT OF TITANIUM TRICHLORIDE AND THE PRODUCT FORMED DURING NO MORE THAN 1 MINUTE OF CONTACT OF AN ALUMINUM DIALKYL HALIDE WITH FROM 0.09 TO 1 MOLE OF WATER PER MOLE OF ALUMINUM DIALKYL HALIDE, THE MOLAR RATIO OF AL:TI BEING BETWEEN ABOUT 1:1 AND ABOUT 5:1; (2) MAINTAINING SAID REACTION MIXTURE AT A TEMPERATURE IN THE RANGE FROM 0*C. TO 120C.; (3) CONTINUOUSLY ADDING TO SAID REACTION MIXTURE ADDITIONAL DILUENT, PROPYLENE, AND CATALYST INGREDIENTS; AND (4) CONTINUOUSLY WITHDRAWING A PORTION OF SAID REACTION MIXTURE DEACTIVATING CATALYST THEREIN, AND RECOVERING POLYMER THEREFROM.
References Cited (Backward Citations)
US2984658A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |