US2846354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of reducing corrosion and plugging of solvent extraction process equipment
Assignee: Pure Oil Co
•
Filing: 1955-09-07
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Granted: 1958-08-05
•
Expires: 1975-09-07
Abstract
No abstract record available.
Inventors
- 👤 Le Roy W Holm
- 👤 Jr George M Longland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:38
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN A SOLVENT REFINING PROCESS FOR IMPROVING THE QUALITIES OF MINERAL LUBRICATING OIL WHEREIN AN OIL IS CONTACTED WITH A PHENOL SOLVENT TO PRODUCE AN OIL-RICH PHASE AND A SOLVENT-RICH PHASE WHICH ARE SUBJECTED TO HEATING CONDITIONS WHEREBY THE PHENOL SOLVENT IS REMOVED FOR RECYCLE INTO THE SYSTEM, THE IMPROVEMENT COMPRISING MAINTAINING A CONTACT MATERIAL SELECTED FROM THE GROUP CONSISTING A CALCIUM OXIDE, CALCIUM HYDROXIDE, CALCIUM CARBONATE, BARIUM OXIDE AND BARIUM HYDROXIDE AND MIXTURES THEREOF IN CONTACT WITH THE PHENOL PRIOR TO SUBJECTION TO SAID HEATIONG CONDITONS, SAID MATERIAL BEING PRESENT IN AMOUNTS UP TO THE EQUIVALENCE OF ABOUT 0.05 PERCENT BY WEIGHT BASED ON THE AMOUNT OF PHENOL AND SUFFICIENT TO PREVENT CORROSION AND PLUGGING IN THE PROCESS EQUIPMENT.
Claim 2
Dependent Claim
120 words
IN A SOLVENT REFINING PROCESS FOR IMPROVING THE QUALITIES OF MINERAL LUBRICATING OIL WHEREIN AN OIL IS CONTACTED WITH A PHENOL SOLVENT TO PRODUCE AN OIL-RICH PHASE AND A SOLVENT-RICH PHASE WHICH ARE SUBJECTED TO HEATING CONDITIONS WHEREBY THE PHENOL SOLVENT IS REMOVED FOR RECYCLE INTO THE SYSTEM, THE IMPROVEMENT COMPRISING MAINTAINING A CONTACT MATERIAL SELECTED FROM THE GROUP CONSISTING A CALCIUM OXIDE, CALCIUM HYDROXIDE, CALCIUM CARBONATE, BARIUM OXIDE AND BARIUM HYDROXIDE AND MIXTURES THEREOF IN CONTACT WITH THE PHENOL PRIOR TO SUBJECTION TO SAID HEATIONG CONDITONS, SAID MATERIAL BEING PRESENT IN AMOUNTS UP TO THE EQUIVALENCE OF ABOUT 0.05 PERCENT BY WEIGHT BASED ON THE AMOUNT OF PHENOL AND SUFFICIENT TO PREVENT CORROSION AND PLUGGING IN THE PROCESS EQUIPMENT.
References Cited (Backward Citations)
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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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |