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US2626290A
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Process for polymerizing olefins with a phosphoric acid slurry catalyst
Assignee: Standard Oil Development Co
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Filing: 1950-03-30
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Granted: 1953-01-20
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Expires: 1970-03-30
Abstract
No abstract record available.
Inventors
- 👤 William K Fell
- 👤 Leslie John Duncan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:25
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/14; C07C2/18; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A NON-REGENERATIVE CATALYTIC PROCESS FOR POLYMERIZING OLEFINS WHICH COMPRISES THE STEPS OF FORMING IN A REACTION ZONE AN AGITATED COSUSPENSION OF FINELY DIVIDED CATALYST COMPRISING PHOSPHORIC ACID DEPOSITED ON A SOLID CARRIER AND FINELY DIVIDED SOLID DILUENT IN FLUID HYDROCARBON, CONTINUOUSLY CONTACTING SAID SUSPENSION WITH OLEFIN FEED AT POLYMERIZATION TEMPERATURE AND PRESSURE, AND CONTINUOUSLY WITHDRAWING EFFLUENT INCLUDING POLYMERIZED OLEFINS FROM SAID ZONE WHILE MAINTAINING SAID CATALYST AND DILUENT IN SAID SUSPENSION WITHIN SAID ZONE, SAID SOLID DILUENT BEING SELECTED FROM THE CLASS CONSISTING OF SILICA GEL, BAUXITE AND ALUMINA AND BEING USED IN AN AMOUNT IN THE RANGE OF 10 TO 50% BY WEIGHT, BASED ON SAID CATALYST, WHEREBY SUBSTANTIAL AGGLOMERATION OF SAID CATALYST IS PREVENTED.
Claim 2
Dependent Claim
116 words
A NON-REGENERATIVE CATALYTIC PROCESS FOR POLYMERIZING OLEFINS WHICH COMPRISES THE STEPS OF FORMING IN A REACTION ZONE AN AGITATED COSUSPENSION OF FINELY DIVIDED CATALYST COMPRISING PHOSPHORIC ACID DEPOSITED ON A SOLID CARRIER AND FINELY DIVIDED SOLID DILUENT IN FLUID HYDROCARBON, CONTINUOUSLY CONTACTING SAID SUSPENSION WITH OLEFIN FEED AT POLYMERIZATION TEMPERATURE AND PRESSURE, AND CONTINUOUSLY WITHDRAWING EFFLUENT INCLUDING POLYMERIZED OLEFINS FROM SAID ZONE WHILE MAINTAINING SAID CATALYST AND DILUENT IN SAID SUSPENSION WITHIN SAID ZONE, SAID SOLID DILUENT BEING SELECTED FROM THE CLASS CONSISTING OF SILICA GEL, BAUXITE AND ALUMINA AND BEING USED IN AN AMOUNT IN THE RANGE OF 10 TO 50% BY WEIGHT, BASED ON SAID CATALYST, WHEREBY SUBSTANTIAL AGGLOMERATION OF SAID CATALYST IS PREVENTED.
References Cited (Backward Citations)
US2293353A
Cited
US2354261A
Cited
US2397945A
Cited
US2459836A
Cited
US2393909A
Cited
US2446619A
Cited
US2453874A
Cited
US2459444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-01-20 | 1956-07-21 | 1957-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-20 | 1960-07-21 | 1961-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-20 | 1964-07-21 | 1965-01-20 | $7700.00 | Window Closed / Lapsed |