Patent US2974174A successfully refreshed from Google Patents.
US2974174A
Expired / Lapsed
US
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Solvent extraction process
Assignee: Phillips Petroleum Co
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Filing: 1958-11-03
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Granted: 1961-03-07
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Expires: 1978-11-03
Abstract
No abstract record available.
Inventors
- 👤 Gilbert L Edmiston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:31
CPC Classifications
C; C07; C07C; C07C35/00; C07C35/02; C07C35/06; C07C29/00; C07C29/74; C07C29/76; C07C29/86; C07C45/00; C07C45/78; C07C45/80; C07C2601/00; C07C2601/06; C07C2601/08; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A PROCESS FOR SEPARATING CYCLIC ALCOHOLS FROM ADMIXTURE WITH THE CORRESPONDING CYCLIC KETONES, WHEREIN SAID ALCOHOLS AND KETONES ARE SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXANONE, CYCLOHEXANOL, CYCLOPENTANON, CYCLOPENTANOL AND ALKYL DERIVATIVES OF SAME CONTAINING NOT MORE THAN 2 CARBON ATOMS IN THE ALKYL SUBSTITUENT, WHICH COMPRISES INTIMATELY CONTACTING SAID MIXTURE WITH A MIXTURE OF FROM ABOUT 50 TO ABOUT 70 WEIGHT PERCENT OF WATER AND FROM ABOUT 3/ TO ABOUT 50 WEIGHT PERCENT OF A POLYHYDROXYL ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GYLCOLS HAVING NOT MORE THAN 4 ETHYLENE GROUPS PER MOLECULE, MONOOMETHYL ETHERS OF SAID GLYCOLS, MONOACETIC-ESTERS, AND MONOFORMIC-ESTERS OF SAID GLYCOLS, AT A TEMPERATURE IN THE RANGE OF ABOUT 100 TO ABOUT 135*F., RECOVERING AN EXTRACT PHASE COMPRISING SOLVENT AND CYCLIC ALCOHOL, AND RECOVERING SAID CYCLIC ALCOHOL FROM SAID SOLVENT.
Claim 2
Dependent Claim
135 words
A PROCESS FOR SEPARATING CYCLIC ALCOHOLS FROM ADMIXTURE WITH THE CORRESPONDING CYCLIC KETONES, WHEREIN SAID ALCOHOLS AND KETONES ARE SELECTED FROM THE GROUP CONSISTING OF CYCLOHEXANONE, CYCLOHEXANOL, CYCLOPENTANON, CYCLOPENTANOL AND ALKYL DERIVATIVES OF SAME CONTAINING NOT MORE THAN 2 CARBON ATOMS IN THE ALKYL SUBSTITUENT, WHICH COMPRISES INTIMATELY CONTACTING SAID MIXTURE WITH A MIXTURE OF FROM ABOUT 50 TO ABOUT 70 WEIGHT PERCENT OF WATER AND FROM ABOUT 3/ TO ABOUT 50 WEIGHT PERCENT OF A POLYHYDROXYL ALCOHOL SELECTED FROM THE GROUP CONSISTING OF ETHYLENE GYLCOLS HAVING NOT MORE THAN 4 ETHYLENE GROUPS PER MOLECULE, MONOOMETHYL ETHERS OF SAID GLYCOLS, MONOACETIC-ESTERS, AND MONOFORMIC-ESTERS OF SAID GLYCOLS, AT A TEMPERATURE IN THE RANGE OF ABOUT 100 TO ABOUT 135*F., RECOVERING AN EXTRACT PHASE COMPRISING SOLVENT AND CYCLIC ALCOHOL, AND RECOVERING SAID CYCLIC ALCOHOL FROM SAID SOLVENT.
References Cited (Backward Citations)
US2410642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |