US3562239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ticl titl3 component of olefin polymerization catalyst
Assignee: Shell USA Inc
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Filing: 1967-06-21
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Granted: 1971-02-09
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Expires: 1987-06-21
Abstract
Abstract TITANIUM TRICHLORIDE FOR USE AS CATALYST COMPONENT IN STEREOREGULAR OLEFIN POLYMERIZATION IS PREPARED BY GRADUAL ADDITION OF A SOLUTION OF TITANIUM TETRACHLORIDE IN INERT DILUENT TO A SOLUTION OF TRIALKYL ALUMINUM IN INERT DILUENT. THE MIXTURE IS PREPARED AND HELD AT A TEMPERATURE BELOW -30*C. AND MOST ADVANTAGEOUSLY BELOW -50*C. UNTIL ADDITION IS COMPLETE, IS THEREAFTER GRADUALLY WARMED UP TO NOT ABOVE 80*C. UNTIL CONVERSION TO TICL3 IS COMPLETE, AND IS THEN HEATED TO AN ELEVATED TEMPERATURE AT WHICH THE TICL3 IS CONVERTED TO THE VIOLET FORM.
Inventors
- 👤 Martijn H De Jong
- 👤 Pieter Van Prooijen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:39
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/907
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |