US2860125A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of separating olefin polymers
Assignee: Phillips Petroleum Co
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Filing: 1953-12-28
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Granted: 1958-11-11
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Expires: 1973-12-28
Abstract
No abstract record available.
Inventors
- 👤 William C Lanning
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:08
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A PROCESS FOR POLYMERIZING A FEED COMPRISING AT LEAST ONE 1-OLEFIN HAVING A MAXIMUM MONOMER CHAIN LENGTH OF 8 CARBON ATOMS AND NO BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION WHICH COMPRISES CONTACTING SAID FEED WITH A CATALYST COMPRISING CHROMIUM OXIDE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICA AND ALUMINA UNDER POLYMERIZING CONDITIONS SO AS TO FORM LIQUID AND TACKY SEMI-SOLIID TO SOLIID POLYMER, WHEREBY THE CATALYST BECOMES AT LEAST PARTIALLY COATED WITH SAID POLYMER; SEPARATING SOLID POLYMER FROM THE EFFLUENT FROM SAID CONTACTING AS A PRODUCT OF THE PROCESS SO AS TO LEAVE A FRACTION COMPRIISING LIQUID POLYMER; AND RECYCLING AT LEAST A PORTION OF SAID LIQUID POLYMER TO SAID CONTACTING SO AS TO MINIMIZE THE COATIING OF POLYMER ON SAID CATALYST.
Claim 2
Dependent Claim
128 words
A PROCESS FOR POLYMERIZING A FEED COMPRISING AT LEAST ONE 1-OLEFIN HAVING A MAXIMUM MONOMER CHAIN LENGTH OF 8 CARBON ATOMS AND NO BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION WHICH COMPRISES CONTACTING SAID FEED WITH A CATALYST COMPRISING CHROMIUM OXIDE AND AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF SILICA AND ALUMINA UNDER POLYMERIZING CONDITIONS SO AS TO FORM LIQUID AND TACKY SEMI-SOLIID TO SOLIID POLYMER, WHEREBY THE CATALYST BECOMES AT LEAST PARTIALLY COATED WITH SAID POLYMER; SEPARATING SOLID POLYMER FROM THE EFFLUENT FROM SAID CONTACTING AS A PRODUCT OF THE PROCESS SO AS TO LEAVE A FRACTION COMPRIISING LIQUID POLYMER; AND RECYCLING AT LEAST A PORTION OF SAID LIQUID POLYMER TO SAID CONTACTING SO AS TO MINIMIZE THE COATIING OF POLYMER ON SAID CATALYST.
References Cited (Backward Citations)
US2692257A
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 |