US3718689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of trisubstituted-hydroxyalkyl alkanoates
Assignee: Union Carbide Corp
•
Filing: 1972-02-10
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Granted: 1973-02-27
•
Expires: 1992-02-10
Abstract
Abstract A continuous process for producing high ratios of trisubstituted-hydroxyalkyl alkanoate product with relation to undesirable trisubstituted alkanediol by-product which comprises continuously subjecting, in a longitudinal-flow zone, an intimate liquid mixture comprising aldehyde and small amounts of relatively concentrated aqueous basic solution.
Inventors
- 👤 Cain J Mc
- 👤 L Theiling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:50
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/44
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
14 words
The process of claim 1 wherein said strong base is an alkali metal hydroxide.
Claim 2
Dependent Claim
13 words
The process of claim 2 wherein said alkali metal hydroxide is sodium hydroxide.
Claim 3
Dependent Claim
21 words
The process of claim 3 wherein said temperature is in the range of from about 60* C. to about 100* C.
Claim 4
Dependent Claim
31 words
The process of claim 4 wherein a homogeneous mixture comprising up to approximately 3 weight percent of an aqueous sodium hydroxide solution, based on the weight of said aldehyde, is employed.
Claim 5
Dependent Claim
21 words
The process of claim 5 wherein said aqueous sodium hydroxide solution contains from about 40 to about 60 weight percent therein.
Claim 6
Dependent Claim
15 words
The process of claim 6 wherein the residence period does not exceed approximately ten minutes.
Claim 7
Dependent Claim
19 words
The process of claim 6 wherein said aldehyde is isobutyraldehyde and wherein said hydroxyalkyl alkanoate product is 3-hydroxy-2,2,4-trimethylpentyl isobutyrate.
References Cited (Backward Citations)
US3091632A
Cited
US3291821A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |