US2967176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for polymerization of ethylene
Assignee: Standard Oil Co
•
Filing: 1957-10-31
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Granted: 1961-01-03
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Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 Frank L Pilar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:20
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE TO A NORMALLY SOLID POLYETHYLENE WHICH COMPRISES REACTING ETHYLENE UNDER POLYMERIZATION CONDITIONS INCLUDING A TEMPERATURE BETWEEN ABOUT 25*C. AND ABOUT 100*C. AND SUPERATMOSPHERIC PRESSURE IN AN INERT HYDROCARBON SOLVENT WITH A CATALYST PREPARED BY (1) REACTING A METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TICL4 AND VCL4 WITH A 1-ARYL ETHYLENE HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF STYRENE AND INDENE AT AMBIENT TEMPERATURE IN A MOLAR RATIO OF SAID HYDROCARBON TO SAID METAL CHLORIDE BETWEEN ABOUT 1 AND ABOUT 10 TO FORM A REACTION PRODUCT, (2) REACTING SAID REACTION PRODUCT WITH AN ALKALI METAL, THE MOLAR RATIO OF SAID ALKALI METAL TO SAID METAL CHLORIDE BEING BETWEEN ABOUT 0.1 AND 10 AND SEPARATING A NORMALLY SOLID POLYETHYLENE SO PRODUCED.
Claim 2
Dependent Claim
128 words
A PROCESS FOR THE POLYMERIZATION OF ETHYLENE TO A NORMALLY SOLID POLYETHYLENE WHICH COMPRISES REACTING ETHYLENE UNDER POLYMERIZATION CONDITIONS INCLUDING A TEMPERATURE BETWEEN ABOUT 25*C. AND ABOUT 100*C. AND SUPERATMOSPHERIC PRESSURE IN AN INERT HYDROCARBON SOLVENT WITH A CATALYST PREPARED BY (1) REACTING A METAL CHLORIDE SELECTED FROM THE GROUP CONSISTING OF TICL4 AND VCL4 WITH A 1-ARYL ETHYLENE HYDROCARBON SELECTED FROM THE GROUP CONSISTING OF STYRENE AND INDENE AT AMBIENT TEMPERATURE IN A MOLAR RATIO OF SAID HYDROCARBON TO SAID METAL CHLORIDE BETWEEN ABOUT 1 AND ABOUT 10 TO FORM A REACTION PRODUCT, (2) REACTING SAID REACTION PRODUCT WITH AN ALKALI METAL, THE MOLAR RATIO OF SAID ALKALI METAL TO SAID METAL CHLORIDE BEING BETWEEN ABOUT 0.1 AND 10 AND SEPARATING A NORMALLY SOLID POLYETHYLENE SO PRODUCED.
References Cited (Backward Citations)
FR1132506A
Cited
FR1137459A
Cited
FR1144316A
Cited
US2879263A
Cited
US2850488A
Cited
US2827446A
Cited
US2843577A
Cited
US2827447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-01-03 | 1964-07-04 | 1965-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-03 | 1968-07-04 | 1969-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-03 | 1972-07-04 | 1973-01-03 | $7700.00 | Window Closed / Lapsed |