US4161492A
Expired / Lapsed
US
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Cycloaliphatic amines and process for preparing same
Assignee: Bayer AG
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Filing: 1977-07-27
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Granted: 1979-07-17
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Expires: 1997-07-27
Abstract
Abstract Cycloaliphatic amines are prepared by catalytically hydrogenating an aromatic amine under elevated pressures and temperatures in the presence of a supported ruthenium catalyst wherein the support is a hydroxide and/or hydrated oxide of chromium and manganese and/or their dehydration products. The catalyst preferably contains from 0.1 to 10% by weight ruthenium based on the total weight of the supported catalyst. Novel cycloaliphatic amines produced according to the process have the formulas ##STR1## wherein THE R substituents are hydrogen or alkyl.
Inventors
- 👤 Oskar Weissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:36
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6562
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
42 words
Process for preparing a cycloaliphatic amine which comprises catalytically hydrogenating an aromatic amine under elevated pressures and temperatures in the presence of a supported ruthenium catalyst wherein the support comprises hydroxides and/or hydrated oxides of chromium and manganese and/or their dehydration products.
Claim 2
Dependent Claim
42 words
Process for preparing a cycloaliphatic amine which comprises catalytically hydrogenating an aromatic amine under elevated pressures and temperatures in the presence of a supported ruthenium catalyst wherein the support comprises hydroxides and/or hydrated oxides of chromium and manganese and/or their dehydration products.
Claim 3
Dependent Claim
21 words
Process of claim 1 wherein the catalyst contains from 0.1 to 10% by weight of ruthenium, relative to the supported catalyst.
Claim 4
Dependent Claim
22 words
Process of claim 1 wherein the weight ratio of the elements manganese and chromium, to one another, is from 0.2:1 to 5:1.
Claim 5
Dependent Claim
12 words
Process of claim 1 wherein the catalyst contains a further support material.
Claim 6
Dependent Claim
14 words
Process of claim 1 wherein the aromatic amine is aniline or a substituted aniline.
Claim 7
Dependent Claim
62 words
Process of claim 1 wherein the aromatic amine has the formula ##STR12## wherein R 1 , R 2 and R 3 are the same or different and each is hydrogen or alkyl, R 4 and R 5 are the same or different and each is optionally substituted alkyl, cycloalkyl, aralkyl or aryl and m, n and p each is 0 or 1.
Claim 8
Dependent Claim
53 words
Process of claim 1 wherein the aromatic amine has the formula ##STR13## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl, R 6 and R 7 are the same or different and each is alkyl and m, n and p each is 0 or 1.
Claim 9
Dependent Claim
47 words
Process of claim 1 wherein the aromatic amine has the formula ##STR14## wherein R 1 , R 2 , R 3 , R 8 , R 9 and R 10 are the same or different and each is hydrogen or alkyl and A is optionally substituted alkylene.
Claim 10
Dependent Claim
16 words
Process of claim 8 wherein A is optionally substituted alkylene having 1 to 6 carbon atoms.
Claim 11
Dependent Claim
41 words
Process of claim 1 wherein the aromatic amine has the formula ##STR15## wherein R 1 , R 2 , R 3 , R 8 , R 9 and R 10 are the same or different and each is hydrogen or alkyl.
Claim 12
Dependent Claim
19 words
Process of claim 1 wherein the hydrogenation is carried out at a temperature of from 150° to 350° C.
Claim 13
Dependent Claim
16 words
Process of claim 1 wherein the hydrogenation is carried out at a pressure above 100 bars.
Claim 14
Dependent Claim
64 words
A process for preparing a cycloaliphatic amine which comprises catalytically hydrogenating an aromatic amine of the formula ##STR16## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl under elevated pressures and temperatures in the presence of a supported ruthenium catalyst wherein the support comprises hydroxides and/or hydrated oxides of chromium and manganese and/or their dehydration products.
Claim 15
Dependent Claim
64 words
A process for preparing a cycloaliphatic amine which comprises catalytically hydrogenating an aromatic amine of the formula ##STR16## wherein R 1 and R 2 are the same or different and each is hydrogen or alkyl under elevated pressures and temperatures in the presence of a supported ruthenium catalyst wherein the support comprises hydroxides and/or hydrated oxides of chromium and manganese and/or their dehydration products.
Claim 16
Dependent Claim
21 words
Process of claim 13 wherein the catalyst contains from 0.1 to 10% by weight of ruthenium, relative to the supported catalyst.
Claim 17
Dependent Claim
22 words
Process of claim 13 wherein the weight ratio of the elements manganese and chromium, to one another, is from 0.2:1 to 5:1.
Claim 18
Dependent Claim
12 words
Process of claim 13 wherein the catalyst contains a further support material.
Claim 19
Dependent Claim
19 words
Process of claim 13 wherein the hydrogenation is carried out at a temperature of from 150° to 350° C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |