US4332738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esterification of neo acids by the use of cation exchange resins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1980-11-24
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Granted: 1982-06-01
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Expires: 2000-11-24
Abstract
Abstract The esterification of neo acids catalyzed by the presence of a macro-reticular structured sulfonic acid cation exchange resin proceeds under mild conditions with a wide variety of alcohols to give readily recoverable esters in high yields and high purity and an easily recoverable and reusable catalyst.
Inventors
- 👤 Francisco M. Benitez
- 👤 Michael F. English
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:08
CPC Classifications
C; C09; C09F; C09F5/00; C09F5/08; C07; C07C; C07C67/00; C07C67/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A method for the direct esterification of a neo acid having from 5 to 28 carbon atoms in its molecule which comprises contacting said acid with an alcohol in a non-aqueous system in the presence of a sulfonic acid cation exchange resin used in its acid form and having a macro-reticular structure.
Claim 2
Independent Claim
52 words
A method for the direct esterification of a neo acid having from 5 to 28 carbon atoms in its molecule which comprises contacting said acid with an alcohol in a non-aqueous system in the presence of a sulfonic acid cation exchange resin used in its acid form and having a macro-reticular structure.
Claim 3
Dependent Claim
23 words
The method according to claim 1 wherein the esterification reaction is carried out at a temperature of about 50° C. to 170° C.
Claim 4
Dependent Claim
20 words
The method according to claim 1 wherein the mole ratio of said neo acid to said alcohol is substantially stoichiometric.
Claim 5
Dependent Claim
13 words
The method according to claim 3 wherein said acid is neo pentanoic acid.
Claim 6
Dependent Claim
13 words
The method according to claim 3 wherein said acid is neo decanoic acid.
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Cited
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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) | 1985-05-31 | 1985-11-30 | 1986-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-31 | 1989-11-30 | 1990-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-31 | 1993-11-30 | 1994-06-01 | $7700.00 | Window Closed / Lapsed |