US2801227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for manufacture of glycidyl ethers of polyhydric phenols
Assignee: Shell Development Co
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Filing: 1953-10-19
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Granted: 1957-07-30
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Expires: 1973-10-19
Abstract
No abstract record available.
Inventors
- 👤 Johan M Goppel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:59
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/02; C08G59/04; C08G59/06; C08G59/063; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/18; C07D303/20; C07D303/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A PROCESS FOR PRODUCTION OF GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES ADDING AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE CONTAINING AT LEAST 15% BY WEIGHT OF THE HYDROXIDE TO AN AGITATED SOLUTION OF A POLYHYDRIC PHENOL IN AT LEAST ABOUT 3 MOLS OF EPICHLORHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT OF THEE PHENOL WHILE SIMULTANEOUSLY DISTILLING WATER AND EPICHLORHYDRIN FROM THE REACTION MIXTURE WITH CONDENSATION OF THE DISTILLED VAPORS AS DISTILLATE WHICH IS SEPARATED INTO TWO LIQUIDS PHASES, AND RETURNING ONLY THE EPICHLORHYDRIN RICH LOWER LAYER TO THE REACTION MIXTURE, THE RATE OF ADDITION OF THE HYDROXIDE SOLUTION AND THE RATE OF DISTILLING BEING REGULATED SO THAT THE CONCENTRATION OF WATER IN THE REACTION MIXTURE IS MAINTAINED AT ABOUT 0.3 TO 2% BY WEIGHT DURING THE COURSE OF THE REACTION, AND THE TOTAL AMOUNT OF HYDROXIDE ADDED BEING FROM ABOUT 1 TO 1.05 MOLS PER PHENOLIC HYDROXYL EQUIVALENT OF THE PHENOL.
Claim 2
Dependent Claim
151 words
A PROCESS FOR PRODUCTION OF GLYCIDYL ETHER OF A POLYHYDRIC PHENOL WHICH COMPRISES ADDING AN AQUEOUS SOLUTION OF ALKALI METAL HYDROXIDE CONTAINING AT LEAST 15% BY WEIGHT OF THE HYDROXIDE TO AN AGITATED SOLUTION OF A POLYHYDRIC PHENOL IN AT LEAST ABOUT 3 MOLS OF EPICHLORHYDRIN PER PHENOLIC HYDROXYL EQUIVALENT OF THEE PHENOL WHILE SIMULTANEOUSLY DISTILLING WATER AND EPICHLORHYDRIN FROM THE REACTION MIXTURE WITH CONDENSATION OF THE DISTILLED VAPORS AS DISTILLATE WHICH IS SEPARATED INTO TWO LIQUIDS PHASES, AND RETURNING ONLY THE EPICHLORHYDRIN RICH LOWER LAYER TO THE REACTION MIXTURE, THE RATE OF ADDITION OF THE HYDROXIDE SOLUTION AND THE RATE OF DISTILLING BEING REGULATED SO THAT THE CONCENTRATION OF WATER IN THE REACTION MIXTURE IS MAINTAINED AT ABOUT 0.3 TO 2% BY WEIGHT DURING THE COURSE OF THE REACTION, AND THE TOTAL AMOUNT OF HYDROXIDE ADDED BEING FROM ABOUT 1 TO 1.05 MOLS PER PHENOLIC HYDROXYL EQUIVALENT OF THE PHENOL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |