US2720547A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of ethers
Assignee: Standard Oil Co
•
Filing: 1951-06-20
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Granted: 1955-10-11
•
Expires: 1971-06-20
Abstract
No abstract record available.
Inventors
- 👤 William F Wolff
- 👤 Carl E Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:20
CPC Classifications
C; C07; C07C; C07C41/00; C07C41/01; C07C41/05; C07C41/06; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/582
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A PROCESS FOR THE PREPARATION OF AN ETHER, WHICH PROCESS COMPRISES CONTRACTING A TERTIARY OLEFINIC HYDROCARBON HAVING LESS THAN 8 CARBON ATOMS PER MOLECULE WITH A NON-TERTIARY ALIPHATIC ALCOHOL HAVING NOT MORE THAN 8 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF ABOUT 0.5 TO ABOUT 10 MOLS PER MOL OF SAID ALCOHOL OF AN ACID CATALYST HAVING AN ACID STRENGTH EQUIVALENT T THAT OF AN ALKANESULFONIC ACID HAVING LESS THAN 6 CARBON ATOMS PER MOLECULE AND A CONCENTRATION GREATER THAN 90 WEIGHT PERCENT AT AN ETHERIFICATION REACTION TEMPERATURE BETWEEN ABOUT -50* C. AND ABOUT + 50* C., THEREAFTER ADDING TO THE REACTION PRODUCT AN ALCOHOL OF THE CLASS HEREINABOVE SPECIFIED IN A PROPORTION OF AT LEAST ABOUT 0.5 MOL PER MOL OF PRODUCED ETHER IN EXCESS OF THE AMOUNT OF SAID ALCOHOL REQUIRED TO PRODUCE AN AZEOTROPE WITH SAID ETHER, AND DISTILLING AN ETHER-ALCOHOL AZEOTROPE FROM THE PRODUCT MIXTURE.
Claim 2
Dependent Claim
150 words
A PROCESS FOR THE PREPARATION OF AN ETHER, WHICH PROCESS COMPRISES CONTRACTING A TERTIARY OLEFINIC HYDROCARBON HAVING LESS THAN 8 CARBON ATOMS PER MOLECULE WITH A NON-TERTIARY ALIPHATIC ALCOHOL HAVING NOT MORE THAN 8 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF ABOUT 0.5 TO ABOUT 10 MOLS PER MOL OF SAID ALCOHOL OF AN ACID CATALYST HAVING AN ACID STRENGTH EQUIVALENT T THAT OF AN ALKANESULFONIC ACID HAVING LESS THAN 6 CARBON ATOMS PER MOLECULE AND A CONCENTRATION GREATER THAN 90 WEIGHT PERCENT AT AN ETHERIFICATION REACTION TEMPERATURE BETWEEN ABOUT -50* C. AND ABOUT + 50* C., THEREAFTER ADDING TO THE REACTION PRODUCT AN ALCOHOL OF THE CLASS HEREINABOVE SPECIFIED IN A PROPORTION OF AT LEAST ABOUT 0.5 MOL PER MOL OF PRODUCED ETHER IN EXCESS OF THE AMOUNT OF SAID ALCOHOL REQUIRED TO PRODUCE AN AZEOTROPE WITH SAID ETHER, AND DISTILLING AN ETHER-ALCOHOL AZEOTROPE FROM THE PRODUCT MIXTURE.
References Cited (Backward Citations)
US1968601A
Cited
US2489619A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |