US2860126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization process
Assignee: Phillips Petroleum Co
•
Filing: 1954-07-09
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Granted: 1958-11-11
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Expires: 1974-07-09
Abstract
No abstract record available.
Inventors
- 👤 Martin R Cines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:21
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/912
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS IN WHICH ETHYLENE, IN SOLUTION IN A HYDROCARBON SOLVENT, IS CONTACTED, AT POLYMERIZATION CONDITIONS OF PRESSURE AND TEMPERATURE, WITH A CHROMIUM OXIDE CATALYST WHICH CATALYZES THE CONVERSION OF OLEFINS TO SOLID POLYMERS AND THE ACTIVITY OF WHIICH IIIS ADVERSELY AFFECTED BY THE PRESENCE OF IMPURITIES IN SAID SOLVENT, WHICH IMPURITIIIES HAVE LOWER BOILIING POIIINTYS THAN SAID SOLVENT EFFLUENT IS TREATED TO REMOVE A NORMALLY GASEOUS FRACTION THEREFROM, THE THUS TREATED EFFLUENT IS FRACTIONALLY DISTILLED IN A DISTILLATION ZONE TO OBTAIN A FRACTION LOWERBOILING THAN SAID SOLVENT, A SOLVENT FRACTION WHICH IS RECYCLED TO THE CONTACTING STEP, AND A FRACTION HIGHER BOILING THAN SAID SOLVENT, AND FRESH SOLVENT IS ADDED TO THE SYSTEM, THE IMPROVEMENT WHICH COMPRISES ADDING SAID FRESH SOLVENT TO THE MIXTURE PASSING TO SAID DISTILLATION ZONE.
Claim 2
Dependent Claim
131 words
IN A PROCESS IN WHICH ETHYLENE, IN SOLUTION IN A HYDROCARBON SOLVENT, IS CONTACTED, AT POLYMERIZATION CONDITIONS OF PRESSURE AND TEMPERATURE, WITH A CHROMIUM OXIDE CATALYST WHICH CATALYZES THE CONVERSION OF OLEFINS TO SOLID POLYMERS AND THE ACTIVITY OF WHIICH IIIS ADVERSELY AFFECTED BY THE PRESENCE OF IMPURITIES IN SAID SOLVENT, WHICH IMPURITIIIES HAVE LOWER BOILIING POIIINTYS THAN SAID SOLVENT EFFLUENT IS TREATED TO REMOVE A NORMALLY GASEOUS FRACTION THEREFROM, THE THUS TREATED EFFLUENT IS FRACTIONALLY DISTILLED IN A DISTILLATION ZONE TO OBTAIN A FRACTION LOWERBOILING THAN SAID SOLVENT, A SOLVENT FRACTION WHICH IS RECYCLED TO THE CONTACTING STEP, AND A FRACTION HIGHER BOILING THAN SAID SOLVENT, AND FRESH SOLVENT IS ADDED TO THE SYSTEM, THE IMPROVEMENT WHICH COMPRISES ADDING SAID FRESH SOLVENT TO THE MIXTURE PASSING TO SAID DISTILLATION ZONE.
References Cited (Backward Citations)
US2692259A
Cited
US2691647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-10 | 1962-05-12 | 1962-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-10 | 1966-05-12 | 1966-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-10 | 1970-05-12 | 1970-11-11 | $7700.00 | Window Closed / Lapsed |