US3067260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycol separation process
Assignee: Millennium Petrochemicals Inc
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Filing: 1959-03-10
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Granted: 1962-12-04
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Expires: 1979-03-10
Abstract
No abstract record available.
Inventors
- 👤 John F Nobis
- 👤 Charles E Frank
- 👤 Edwin A Allgeier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:57
CPC Classifications
C; C07; C07C; C07C29/00; C07C29/74; C07C29/76; C07C29/86
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR THE SEPERATION AND RECOVERY OF A STRAIGHT CHAIN ALKANEDIOL FRACTION AND A BRANCHED CHAIN ALKANEDIOLS FRACTION FROM A MIXTURE OF CRUDE SATURATED ISOMERIC ALKANEDIOLS HAVING 8 TO 12 CARBON ATOMS BETWEEN THE HYDROXYL GROUPS WHICH COMPRISES INTIALLY ADMIXING SAID CURDE ISOMERIC MIXTURE WITH A LIQUID AROMATIC HYDROCARBON AT A TEMPERATURE BETWEEN ABOUT 0* AND 60*C. TO PRECIPITATE THE STRAIGHT CHAIN ALKANEDIOL FRACTION, RECOVERING THE STRAIGHT CHAIN ALKANEDIOL FROM THE RESULTING AROMATIC HYDROCARBON LAYER AND THE BRANCHED CHAIN ALKANEDIOL LAYER, SEPARATING THE AROMATIC HYDROCARBON LAYER FROM THE BRANCHED CHAIN ALKANEDIOL LAYER, SUBSEQUENTLY WASHING THE LAYER CONTAINING THE BRANCHED CHAIN ALKANEDIOLS WITH A LIQUID SATURATED ALIPHATIC HYDROCARBON HAVING UP TO ABOUT 12 CARBON ATOMS AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND THE BOILING POINT OF THE ALIPHATIC HYDROCARBON, AND RECOVERING THE BRANCHED CHAIN ALKANEDIOL FRACTION.
Claim 2
Dependent Claim
137 words
A PROCESS FOR THE SEPERATION AND RECOVERY OF A STRAIGHT CHAIN ALKANEDIOL FRACTION AND A BRANCHED CHAIN ALKANEDIOLS FRACTION FROM A MIXTURE OF CRUDE SATURATED ISOMERIC ALKANEDIOLS HAVING 8 TO 12 CARBON ATOMS BETWEEN THE HYDROXYL GROUPS WHICH COMPRISES INTIALLY ADMIXING SAID CURDE ISOMERIC MIXTURE WITH A LIQUID AROMATIC HYDROCARBON AT A TEMPERATURE BETWEEN ABOUT 0* AND 60*C. TO PRECIPITATE THE STRAIGHT CHAIN ALKANEDIOL FRACTION, RECOVERING THE STRAIGHT CHAIN ALKANEDIOL FROM THE RESULTING AROMATIC HYDROCARBON LAYER AND THE BRANCHED CHAIN ALKANEDIOL LAYER, SEPARATING THE AROMATIC HYDROCARBON LAYER FROM THE BRANCHED CHAIN ALKANEDIOL LAYER, SUBSEQUENTLY WASHING THE LAYER CONTAINING THE BRANCHED CHAIN ALKANEDIOLS WITH A LIQUID SATURATED ALIPHATIC HYDROCARBON HAVING UP TO ABOUT 12 CARBON ATOMS AT A TEMPERATURE BETWEEN ABOUT ROOM TEMPERATURE AND THE BOILING POINT OF THE ALIPHATIC HYDROCARBON, AND RECOVERING THE BRANCHED CHAIN ALKANEDIOL FRACTION.
References Cited (Backward Citations)
US2803672A
Cited
US2850540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-12-03 | 1966-06-04 | 1966-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-03 | 1970-06-04 | 1970-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-03 | 1974-06-04 | 1974-12-04 | $7700.00 | Window Closed / Lapsed |