US4273934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of 3-hydroxy-2,2,4-trimethylpentyl isobutyrate
Assignee: BASF SE
•
Filing: 1979-04-17
•
Granted: 1981-06-16
•
Expires: 1999-04-17
Abstract
Abstract 3-Hydroxy-2,2,4-trimethylpentyl isobutyrate is prepared by reaction of isobutyraldehyde in the presence of an alkaline earth metal hydroxide and of carboxylic acids or the corresponding salts, under specific conditions in respect of reaction time and proportion and concentration of the hydroxide suspension. The product is a starting material for the preparation of dyes, pesticides, adhesives and surface coatings.
Inventors
- 👤 Franz Merger
- 👤 Hans-Juergen Foerster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:17
CPC Classifications
C; C07; C07C; C07C67/00; C07C67/44
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
130 words
A process for the preparation of 3-hydroxy-2,2,4-trimethylpentyl isobutyrate by reacting isobutyraldehyde in the presence of a basic compound and water, wherein isobutyraldehyde is reacted in the presence of from 1.5 to 5 percent by weight, based on isobutyraldehyde, of a carboxylic acid selected from the group consisting of isobutyric acid, 2,2,4-trimethyl-3-hydroxy-pentanoic acid, 2-ethylhexanecarboxylic acid, benzoic acid, phenylpropionic acid and α-methylpentanecarboxylic acid in the form of the free acid, or an alkali metal salt and/or alkaline earth metal salt thereof, and in the presence of from 0.01 to 0.1 mole of an alkaline earth metal hydroxide selected from the group consisting of barium hydroxide, strontium hydroxide and calcium hydroxide and from 0.04 to 1 mole of water per mole of isobutyraldehyde, for a reaction time of from 10 to 300 minutes.
Claim 2
Dependent Claim
130 words
A process for the preparation of 3-hydroxy-2,2,4-trimethylpentyl isobutyrate by reacting isobutyraldehyde in the presence of a basic compound and water, wherein isobutyraldehyde is reacted in the presence of from 1.5 to 5 percent by weight, based on isobutyraldehyde, of a carboxylic acid selected from the group consisting of isobutyric acid, 2,2,4-trimethyl-3-hydroxy-pentanoic acid, 2-ethylhexanecarboxylic acid, benzoic acid, phenylpropionic acid and α-methylpentanecarboxylic acid in the form of the free acid, or an alkali metal salt and/or alkaline earth metal salt thereof, and in the presence of from 0.01 to 0.1 mole of an alkaline earth metal hydroxide selected from the group consisting of barium hydroxide, strontium hydroxide and calcium hydroxide and from 0.04 to 1 mole of water per mole of isobutyraldehyde, for a reaction time of from 10 to 300 minutes.
Claim 3
Dependent Claim
19 words
A process as claimed in claim 1, wherein the reaction is carried out at from 0.98 to 10 bar.
Claim 4
Dependent Claim
19 words
A process as claimed in claim 1, wherein the reaction is carried out at from 20° to 150° C.
Claim 5
Dependent Claim
19 words
A process as claimed in claim 1, wherein the reaction is carried out at from 40° to 90° C.
Claim 6
Dependent Claim
28 words
A process as claimed in claim 1, wherein the reaction is carried out with from 0.015 to 0.07 mole of alkaline earth metal hydroxide per mole of isobutyraldehyde.
Claim 7
Dependent Claim
25 words
A process as claimed in claim 1, wherein the reaction is carried out with from 0.08 to 0.5 mole of water per mole of isobutyraldehyde.
Claim 8
Dependent Claim
23 words
A process as claimed in claim 1, wherein the reaction is carried out for a reaction time of from 20 to 200 minutes.
Claim 9
Dependent Claim
27 words
A process as claimed in claim 1, wherein the reaction is carried out with from 1.5 to 3 percent by weight of carboxylic acid, based on isobutyraldehyde.
References Cited (Backward Citations)
DE646482C
Cited
DE1291041B
Cited
US3291821A
Cited
US3703541A
Cited
US3718689A
Cited
US4017537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-06-15 | 1984-12-15 | 1985-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-06-15 | 1988-12-15 | 1989-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-06-15 | 1992-12-15 | 1993-06-16 | $7700.00 | Window Closed / Lapsed |