US3420809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalyst for ethylene polymerization
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1966-08-12
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Granted: 1969-01-07
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Expires: 1986-08-12
Abstract
No abstract record available.
Inventors
- 👤 Erik Tornqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A PROCESS FOR PREPARING A CATALYST COMPRISING 0.1 TO 5 MOLES OF ALCL3 AND 0.5 TO 10 ATOMS OF ALUMINUM PER MOLE OF A TRANSISTION METAL HALIDE SELECTED FROM THE GROUP CONSISTING TICL4, TIBR4 AND VCL4, SAID CATALYST BEING SUITABLE FOR POLYMERIZING ETHYLENE, WHICH CONSISTS OF GRINDING IN A DRY INERT ENVIRONMENT A MIXTURE OF FINELY DIVIDED ALUMINUM POWDER WITH AT LEAST A PORTION OF THE ALCL3 UNTIL AT LEAST A DARKENING IN COLOR OF SAID ALUMINUM POWDER IN THE RESULTING MIXTURE OCCURS, THE ALUMINUM/ ALCL3 MOLAR RATIO BEING ABOUT A MINIMUM OF 3:1, AND A MAXIMUM INSUFFICIENT TO CAUSE CAKING BEFORE SAID DARKENING, AND THEN ADMIXING THE THUS GROUND MATERIAL WITH THE TRANSISTION METAL CHLORIDE AND RESIDUAL ALCL3.
Claim 2
Dependent Claim
119 words
A PROCESS FOR PREPARING A CATALYST COMPRISING 0.1 TO 5 MOLES OF ALCL3 AND 0.5 TO 10 ATOMS OF ALUMINUM PER MOLE OF A TRANSISTION METAL HALIDE SELECTED FROM THE GROUP CONSISTING TICL4, TIBR4 AND VCL4, SAID CATALYST BEING SUITABLE FOR POLYMERIZING ETHYLENE, WHICH CONSISTS OF GRINDING IN A DRY INERT ENVIRONMENT A MIXTURE OF FINELY DIVIDED ALUMINUM POWDER WITH AT LEAST A PORTION OF THE ALCL3 UNTIL AT LEAST A DARKENING IN COLOR OF SAID ALUMINUM POWDER IN THE RESULTING MIXTURE OCCURS, THE ALUMINUM/ ALCL3 MOLAR RATIO BEING ABOUT A MINIMUM OF 3:1, AND A MAXIMUM INSUFFICIENT TO CAUSE CAKING BEFORE SAID DARKENING, AND THEN ADMIXING THE THUS GROUND MATERIAL WITH THE TRANSISTION METAL CHLORIDE AND RESIDUAL ALCL3.
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |