US3903171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of 2-ethylhexan-1-al
Assignee: BASF SE
•
Filing: 1971-02-16
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Granted: 1975-09-02
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Expires: 1991-02-16
Abstract
Abstract Improved process for the manufacture of 2-ethylhexan-1-al by hydrogenating 2-ethylhex-2-en-1-al at temperatures of from 80* to 160*C and at pressures of from 10 to 250 atmospheres in an irrigation zone in the presence of fixed-bed catalysts comprising platinum, palladium or ruthenium supported on carriers, the improvement comprising feeding crude 2-ethylhexan-1-al to the irrigation zone in an amount which is from 2 to 10 times the amount of freshly introduced 2-ethylhex-2-en-1-al.
Inventors
- 👤 Herbert Toussaint
- 👤 Guenter Boettger
- 👤 Ludwig Schuster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:15
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/61; C07C45/62
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
103 words
IN A PROCESS FOR THE MANUFACTURER OF 2-ETHYLHEXAN-1-AL BY HYDROGENATING 2-ETHYLHEX-2-EN-1-AL AT TEMPERATURES OF FROM 80* TO 160*C AND AT PRESSURES OF FROM 20 TO 200 ATMOSPHERES IN THE PRESENCE OF FIXED-BED PALLADIUM, PLATINUM OR RUTHENIUM CATALYSTS ON ALUMINA, SILICA OR SILICA GEL SUPPORTS IN AN IRRIGATION ZONE WITH PART OF THE CRUDE 2-ETHYLHEXAN-1-AL BEING RECYCLED, THE IMPROVEMENT WHICH COMPRISES RECYCLING 2 TO 10 TIMES THE AMOUNT OF CRUDE 2-ETHYLHEXAN-1-AL WITH REFERENCE TO THE AMOUNT OF 2-ETHYLHEX-2-EN-1-AL INTRODUCED WITH THE PROVISO THAT THE TOTAL AMOUNT OF MATERIAL FED TO THE IRRIGATION ZONE PROVIDES A LINEAR VELOCITY OF 10 TO 50 METERS PER HOUR.
Claim 2
Dependent Claim
103 words
IN A PROCESS FOR THE MANUFACTURER OF 2-ETHYLHEXAN-1-AL BY HYDROGENATING 2-ETHYLHEX-2-EN-1-AL AT TEMPERATURES OF FROM 80* TO 160*C AND AT PRESSURES OF FROM 20 TO 200 ATMOSPHERES IN THE PRESENCE OF FIXED-BED PALLADIUM, PLATINUM OR RUTHENIUM CATALYSTS ON ALUMINA, SILICA OR SILICA GEL SUPPORTS IN AN IRRIGATION ZONE WITH PART OF THE CRUDE 2-ETHYLHEXAN-1-AL BEING RECYCLED, THE IMPROVEMENT WHICH COMPRISES RECYCLING 2 TO 10 TIMES THE AMOUNT OF CRUDE 2-ETHYLHEXAN-1-AL WITH REFERENCE TO THE AMOUNT OF 2-ETHYLHEX-2-EN-1-AL INTRODUCED WITH THE PROVISO THAT THE TOTAL AMOUNT OF MATERIAL FED TO THE IRRIGATION ZONE PROVIDES A LINEAR VELOCITY OF 10 TO 50 METERS PER HOUR.
Claim 3
Dependent Claim
14 words
A process as claimed in claim 1 wherein palladium is used as catalyst metal.
Claim 4
Dependent Claim
22 words
A process as claimed in claim 1 wherein the catalysts contain from 0.01 to 1% by weight of platinum, palladium or ruthenium.
Claim 5
Dependent Claim
16 words
A process as claimed in claim 1 wherein temperatures of from 110* to 150*C are used.
Claim 6
Dependent Claim
39 words
A process as claimed in claim 1 wherein the temperature at the inlet end of the irrigation zone is from 80* to 130*C and the temperature at the outlet end of the irrigation zone is from 110* to 150*C.
References Cited (Backward Citations)
US2485989A
Cited
US2825743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |