US4017537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Noncatalyzed aldol reaction
Assignee: Eastman Kodak Co
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Filing: 1975-08-25
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Granted: 1977-04-12
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Expires: 1995-08-25
Abstract
Abstract The process of carrying out aldol condensations either batch-wise or continuously without catalyst with formaldehyde and another aldehyde in the presence of esterifying acid at a temperature of from about 150 DEG C to about 280 DEG C., with from about 170 DEG C. to about 190 DEG C. being preferred.
Inventors
- 👤 Anthony W. McCollum
- 👤 Hugh J. Hagemeyer, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:23
CPC Classifications
C; C07; C07C; C07C67/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
64 words
The process for preparing beta-acyloxyaldehydes comprising reacting at a temperature from about 150° C. to about 280° C., formaldehyde, an aldehyde having the formula ##STR8##wherein R 1 and R 2 are each selected from hydrogen, alkyl of 1-12 carbons, and phenyl, and, in the absence of any other acid, an acid having the formula RCOOH wherein R is alkyl of 1-12 carbons or phenyl.
Claim 2
Dependent Claim
64 words
The process for preparing beta-acyloxyaldehydes comprising reacting at a temperature from about 150° C. to about 280° C., formaldehyde, an aldehyde having the formula ##STR8##wherein R 1 and R 2 are each selected from hydrogen, alkyl of 1-12 carbons, and phenyl, and, in the absence of any other acid, an acid having the formula RCOOH wherein R is alkyl of 1-12 carbons or phenyl.
Claim 3
Dependent Claim
30 words
The process of claim 1 wherein said aldehyde is in sufficient quantity to react all of the formaldehyde, and said acid is in sufficient quantity to esterify all hydroxy radicals.
Claim 4
Dependent Claim
19 words
The process of claim 1 carried out in an autoclave at a pressure between about 300 and 1000 psi.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the reactants are isobutyraldehyde, paraformaldehyde, and acetic acid, and the principal product is beta-acetoxypivaldehyde.
Claim 6
Dependent Claim
39 words
The process of claim 3 wherein the reactants are isobutyraldehyde, formaldehyde and acetic acid wherein said aldehyde is in sufficient quantity to react all of the formaldehyde, and said acid is in sufficient quantity to esterify all hydroxy radicals.
References Cited (Backward Citations)
JPS4221687Y1
Cited
US3374267A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |