US3442820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Olefin polymerization catalyst pretreatment
Assignee: Hercules LLC
•
Filing: 1966-03-30
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Granted: 1969-05-06
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Expires: 1986-03-30
Abstract
No abstract record available.
Inventors
- 👤 Steffen F Dieckmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:28
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/904
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
A PROCESS FOR PRETREATING TITANIUM TRICHLORIDE TO ENHANCE ITS USEFULNESS AS A CATALYST FOR THE POLYMERIZATION OF OLEFINS BY REDUCING ITS SOLUBILITY IN THE POLYMERIZATION MEDIUM WHICH COMPRISES SLURRYING TITANMIUM TRICHLORIDE IN A SOLUTION OF AN ORGANOLAUMINUM COMPOUND IN AN INERT LIQUID HYDROCARBON REACTING THEREWITH AT A TEMPERATURE OF ABOUT 20-80*C. AN AMOUNT OF ETHYLENE SUFFICIENT TO RENDER THE DISPERSED TITANIUM COMPOUND SUBSTANTIALLY INSOLUBLE IN SAID SOLUTION, AND THEREAFTER SEPARATING THE TREATED TITANIUM TRICHLORIDE, WASHING THE SAME AT LEAST ONCE WITH AN INERT LIQUID HYDROCARBON AND RECOVERING THE TREATED TITANIUM TRICHLORIDE PARTICLES.
Claim 2
Dependent Claim
92 words
A PROCESS FOR PRETREATING TITANIUM TRICHLORIDE TO ENHANCE ITS USEFULNESS AS A CATALYST FOR THE POLYMERIZATION OF OLEFINS BY REDUCING ITS SOLUBILITY IN THE POLYMERIZATION MEDIUM WHICH COMPRISES SLURRYING TITANMIUM TRICHLORIDE IN A SOLUTION OF AN ORGANOLAUMINUM COMPOUND IN AN INERT LIQUID HYDROCARBON REACTING THEREWITH AT A TEMPERATURE OF ABOUT 20-80*C. AN AMOUNT OF ETHYLENE SUFFICIENT TO RENDER THE DISPERSED TITANIUM COMPOUND SUBSTANTIALLY INSOLUBLE IN SAID SOLUTION, AND THEREAFTER SEPARATING THE TREATED TITANIUM TRICHLORIDE, WASHING THE SAME AT LEAST ONCE WITH AN INERT LIQUID HYDROCARBON AND RECOVERING THE TREATED TITANIUM TRICHLORIDE PARTICLES.
Claim 3
Dependent Claim
22 words
A PROCESS ACCORDING TO CLAIM 1 WHERE THE TITANIUM TRICHLORIDE IS PREPARED BY THE REACTION OF TITANIUM TETRACHLORIDE WITH AN ALKYLALUMINUM SESQUIHALIDE.
References Cited (Backward Citations)
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US2977350A
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US3030350A
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US2936302A
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US2967176A
Cited
US2996459A
Cited
US3215682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-05 | 1972-11-04 | 1973-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-05 | 1976-11-04 | 1977-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-05 | 1980-11-04 | 1981-05-06 | $7700.00 | Window Closed / Lapsed |