US2963520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diluent purification process
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1957-12-24
•
Granted: 1960-12-06
•
Expires: 1977-12-24
Abstract
No abstract record available.
Inventors
- 👤 Neal Arthur Homer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:33
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
THE PROCESS FOR PURIFYING SATURATED HYDROCARBON DILUENTS USED IN THE LOW PRESSURE POLYMERIZATION OF ALPHA OLEFINS SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE AND WHICH CONTAIN CONTAMINANTS WHICH CONTAMINATE CATALYSTS, FORMED BY ADMNIXING A TITANIUM HALIDE AND AN ALUMINUM ALKYL, USED THEREIN COMPRISING PASSING THE CONTAMINATED DILUENT THROUGH A SILICA GEL BED TO PURIFY THE DILUENT, CONTINUOUSLY MONITORING THE PURIFIED DILUENT TO DETERMINE THE CONCENTRATION OF AT LEAST ONE CONTAMINANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC COMPOUNDS, SULFUR COMPOUNDS, AND OLEFINIC COMPOUNDS PRESENT THEREIN TO DETERMINE WHEN THE GEL IS SPENT, TREATING THE SPENT SILICA GEL WITH THE ALPHA OLEFIN BEING POLYMERIZED AT A TEMPERATURE IN THE RANGE OF 25 TO 250*C. AND A PRESSURE IN THE RANGE OF 0 TO 200 P.S.I.G., AND REPEATING THE ABOVE PROCESS.
Claim 2
Dependent Claim
131 words
THE PROCESS FOR PURIFYING SATURATED HYDROCARBON DILUENTS USED IN THE LOW PRESSURE POLYMERIZATION OF ALPHA OLEFINS SELECTED FROM THE GROUP CONSISTING OF ETHYLENE AND PROPYLENE AND WHICH CONTAIN CONTAMINANTS WHICH CONTAMINATE CATALYSTS, FORMED BY ADMNIXING A TITANIUM HALIDE AND AN ALUMINUM ALKYL, USED THEREIN COMPRISING PASSING THE CONTAMINATED DILUENT THROUGH A SILICA GEL BED TO PURIFY THE DILUENT, CONTINUOUSLY MONITORING THE PURIFIED DILUENT TO DETERMINE THE CONCENTRATION OF AT LEAST ONE CONTAMINANT SELECTED FROM THE GROUP CONSISTING OF AROMATIC COMPOUNDS, SULFUR COMPOUNDS, AND OLEFINIC COMPOUNDS PRESENT THEREIN TO DETERMINE WHEN THE GEL IS SPENT, TREATING THE SPENT SILICA GEL WITH THE ALPHA OLEFIN BEING POLYMERIZED AT A TEMPERATURE IN THE RANGE OF 25 TO 250*C. AND A PRESSURE IN THE RANGE OF 0 TO 200 P.S.I.G., AND REPEATING THE ABOVE PROCESS.
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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 |