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US4018831A
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Production of 2-ethyl hexanal
Assignee: Mallinckrodt Chemical Inc
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Filing: 1975-09-11
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Granted: 1977-04-19
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Expires: 1995-09-11
Abstract
Abstract 2-Ethyl hexanal is produced by hydrogenation of 2-ethyl hexene-2-al-1 without substantial formation of by-product 2-ethyl hexanol by liquid phase upflow through a catalyst bed with controlled hydrogen concentration at 90°-180° C and a pressure of 5-40 Kgm/cm 2 .
Inventors
- 👤 Emmerson Bowes
- 👤 Robert E. Chute
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:53
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/62
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
151 words
A process for the production of 2-ethyl hexanal without substantial simultaneous production of 2-ethyl hexanol which consists essentially of: A. providing a bed of particulate hydrogenation catalyst consisting essentially of nickel coated on alumina, the D/A ratio of said bed being between about 1:1 and 6:1 wherein D is the depth of the bed in centimeters and A is the cross-sectional area in square centimeters, B. passing 2-ethyl-hexene-2-al-1 (TEH) in the liquid phase upwardly through said bed at a LHSV from about 0.5 to 3, C. injecting hydrogen into stream of TEH entering said bed at the base thereof, D. maintaining the temperature of said bed at about 90° - 180° C, E. maintaining the fluid in contact with said bed at a pressure between about 7 to 35 Kgm/cm 2 , F. removing a liquid stream overhead from said bed, and G. recovering 2-ethyl hexanal from said overhead effluent stream.
Claim 2
Dependent Claim
151 words
A process for the production of 2-ethyl hexanal without substantial simultaneous production of 2-ethyl hexanol which consists essentially of: A. providing a bed of particulate hydrogenation catalyst consisting essentially of nickel coated on alumina, the D/A ratio of said bed being between about 1:1 and 6:1 wherein D is the depth of the bed in centimeters and A is the cross-sectional area in square centimeters, B. passing 2-ethyl-hexene-2-al-1 (TEH) in the liquid phase upwardly through said bed at a LHSV from about 0.5 to 3, C. injecting hydrogen into stream of TEH entering said bed at the base thereof, D. maintaining the temperature of said bed at about 90° - 180° C, E. maintaining the fluid in contact with said bed at a pressure between about 7 to 35 Kgm/cm 2 , F. removing a liquid stream overhead from said bed, and G. recovering 2-ethyl hexanal from said overhead effluent stream.
Claim 3
Dependent Claim
19 words
The process of claim 1 wherein said catalyst has an average particle size between about 1 to 25 mm.
References Cited (Backward Citations)
US3449435A
Cited
US3903171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-04-18 | 1980-10-18 | 1981-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-18 | 1984-10-18 | 1985-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-18 | 1988-10-18 | 1989-04-19 | $7700.00 | Window Closed / Lapsed |