US2963469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of catalyst and filter aid in olefin polymerization
Assignee: Phillips Petroleum Co
•
Filing: 1956-10-16
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Granted: 1960-12-06
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Expires: 1976-10-16
Abstract
No abstract record available.
Inventors
- 👤 Martin R Cines
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:05
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR POLYMERIZING A 1-OLEFIN HAVING A MAXIMUM CHAIN LENGTH OF 8 CARBON ATOMS AND HAVING NO BRANCHING CLOSER THAN THE 4-POSITION TO THE DOUBLE BOND, SAID PROCESS COMPRISING DISSOLVING SAID OLEFIN IN A SATURATED HYDROCARBON SOLVENT, ADDING AN ACTIVATED CHROMIUM OXIDE ON SILICA-ALUMINA CATALYST TO SAID SOLUTION, STIRRING THE RESULTING SOLUTION UNDER A PRESSURE IN THE RANGE OF 100700 POUNDS PER SQUARE INCH GAGE AND AT A TEMPERATURE IN THE RANGE OF 100-450*F. UNTIL THE DESIRED DEGREE OF CONVERSION IS OBTAINED, FLASHING UNREACTED OLEFIN FROM THE RESULTING SLURRY, ADDING DIATOMACEOUS EARTH FILTER AID AT THE RATE OF 0.5 TO 6 WEIGHT PART FILTER AID PER PART CATALYST
Claim 2
Dependent Claim
109 words
A PROCESS FOR POLYMERIZING A 1-OLEFIN HAVING A MAXIMUM CHAIN LENGTH OF 8 CARBON ATOMS AND HAVING NO BRANCHING CLOSER THAN THE 4-POSITION TO THE DOUBLE BOND, SAID PROCESS COMPRISING DISSOLVING SAID OLEFIN IN A SATURATED HYDROCARBON SOLVENT, ADDING AN ACTIVATED CHROMIUM OXIDE ON SILICA-ALUMINA CATALYST TO SAID SOLUTION, STIRRING THE RESULTING SOLUTION UNDER A PRESSURE IN THE RANGE OF 100700 POUNDS PER SQUARE INCH GAGE AND AT A TEMPERATURE IN THE RANGE OF 100-450*F. UNTIL THE DESIRED DEGREE OF CONVERSION IS OBTAINED, FLASHING UNREACTED OLEFIN FROM THE RESULTING SLURRY, ADDING DIATOMACEOUS EARTH FILTER AID AT THE RATE OF 0.5 TO 6 WEIGHT PART FILTER AID PER PART CATALYST
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-06 | 1964-06-06 | 1964-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-06 | 1968-06-06 | 1968-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-06 | 1972-06-06 | 1972-12-06 | $7700.00 | Window Closed / Lapsed |