Patent US4344434A successfully refreshed from Google Patents.
US4355180A
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Preparation of primary aromatic amines from cyclic alcohols and/or ketones
Assignee: BASF SE
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Filing: 1981-09-25
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Granted: 1982-10-19
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Expires: 2001-09-25
Abstract
Abstract Aromatic amines, in particular substituted amines, are obtained from corresponding alicyclic alcohols or ketones, in one step, by amination and dehydrogenation with ammonia in the presence of hydrogen and of a palladium catalyst which also contains zinc or cadmium.
Inventors
- 👤 Norbert Goetz
- 👤 Leopold Hupfer
- 👤 Werner Hoffmann
- 👤 Manfred Baumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:45
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/24; C07C209/26; C07C213/00; C07C213/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
106 words
A process for the production of an aromatic amine having the general formula ##STR3## wherein at least one of R 1 , R 2 , R 3 , R 4 and R 5 is different from hydrogen and may be a C 1 to C 20 alkyl, cycloalkyl or alkoxy group, a substituted or unsubstituted aryl or alkylaryl group, by reacting a saturated or olefinically unsaturated cyclic alcohol or ketone of the general formula ##STR4## R 1 to R 5 having the aforementioned meanings, with ammonia in the presence of a (de)hydrogenating catalyst and preferably hydrogen, wherein the (de)hydrogenating catalyst is palladium and zinc and/or cadmium.
Claim 2
Dependent Claim
106 words
A process for the production of an aromatic amine having the general formula ##STR3## wherein at least one of R 1 , R 2 , R 3 , R 4 and R 5 is different from hydrogen and may be a C 1 to C 20 alkyl, cycloalkyl or alkoxy group, a substituted or unsubstituted aryl or alkylaryl group, by reacting a saturated or olefinically unsaturated cyclic alcohol or ketone of the general formula ##STR4## R 1 to R 5 having the aforementioned meanings, with ammonia in the presence of a (de)hydrogenating catalyst and preferably hydrogen, wherein the (de)hydrogenating catalyst is palladium and zinc and/or cadmium.
Claim 3
Dependent Claim
17 words
A process as claimed in claim 1, wherein the reaction temperature is from 100° to 350° C.
Claim 4
Dependent Claim
21 words
A process as claimed in claim 1 or 2, wherein the reaction pressure is from atmospheric pressure up to 300 bars.
Claim 5
Dependent Claim
19 words
A process as claimed in claim 3, wherein the reaction pressure is atmospheric and the reaction mixture is gaseous.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 3, wherein the reaction mixture is essentially liquid.
Claim 7
Dependent Claim
23 words
A process as claimed in claim 1, wherein the ketone is olefinically unsaturated and the saturated ketone is isolated as an intermediate product.
Claim 8
Dependent Claim
33 words
A process as claimed in claim 1, wherein the palladium catalyst is deposited on a carrier selected from the group consisting of aluminum oxide, silica, a silicate of aluminum or magnesium, and carbon.
Claim 9
Dependent Claim
35 words
A process as claimed in claim 7, wherein the catalyst contains, based on the weight of the carrier, from 0.05 to 15% palladium and 0.01 to 5% zinc and/or cadmium, the carrier being aluminum oxide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |