US2996459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing a ziegler polymerization catalyst
Assignee: Monsanto Chemicals Ltd
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Filing: 1958-02-03
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Granted: 1961-08-15
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Expires: 1978-02-03
Abstract
No abstract record available.
Inventors
- 👤 Harry M Andersen
- 👤 Jr William R Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:37
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD FOR PREPARING A POLYMERIZATION CATALYST BY THE INTERACTION OF (A) AN ALUMINUM COMPOUND OF THE GENERAL FORMULA R2ALX WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL AND ARYL RADICALS AND X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN, ALKYL, CYCLOALKYL AND ARYL RADICALS, WITH (B) A METAL HALIDE SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES, BROMIDES, AND IODIDES OF TITANIUM AND ZIRCONIUM, IN WHICH AN ALKYL MERCAPTAN OF UP TO 20 CARBON ATOMS IS ADDED SUBSEQUENT TO THE SAID METAL HALIDE IN AN AMOUNT WHICH IS SUBSTANTIAL BUT INSUFFICIENT TO DESTROY ACTIVITY OF THE CATALYST, THE SAID ALKYL MERCAPTAN BEING USED IN AN AMOUNT FROM 0.1 TO 1.5 MOLES PER MOLE OF METAL HALIDE USED.
Claim 2
Independent Claim
123 words
A METHOD FOR PREPARING A POLYMERIZATION CATALYST BY THE INTERACTION OF (A) AN ALUMINUM COMPOUND OF THE GENERAL FORMULA R2ALX WHEREIN R IS SELECTED FROM THE GROUP CONSISTING OF ALKYL, CYCLOALKYL AND ARYL RADICALS AND X IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, HALOGEN, ALKYL, CYCLOALKYL AND ARYL RADICALS, WITH (B) A METAL HALIDE SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES, BROMIDES, AND IODIDES OF TITANIUM AND ZIRCONIUM, IN WHICH AN ALKYL MERCAPTAN OF UP TO 20 CARBON ATOMS IS ADDED SUBSEQUENT TO THE SAID METAL HALIDE IN AN AMOUNT WHICH IS SUBSTANTIAL BUT INSUFFICIENT TO DESTROY ACTIVITY OF THE CATALYST, THE SAID ALKYL MERCAPTAN BEING USED IN AN AMOUNT FROM 0.1 TO 1.5 MOLES PER MOLE OF METAL HALIDE USED.
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) | 1964-08-14 | 1965-02-13 | 1965-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-14 | 1969-02-13 | 1969-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-14 | 1973-02-13 | 1973-08-15 | $7700.00 | Window Closed / Lapsed |