US4186145A
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Process for the hydrogenation of an aromatic amine and the supported ruthenium catalyst used in the process
Assignee: Bayer AG
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Filing: 1978-10-03
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Granted: 1980-01-29
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Expires: 1998-10-03
Abstract
Abstract A supported ruthenium catalyst comprising a hydroxide, hydrated oxide or oxide of chromium and manganese as the catalyst support, said catalyst containing an inorganic and/or organic alkali metal compound, a process for its preparation and use of such supported ruthenium catalyst as a catalyst especially for nuclear hydrogenation of aromatic amines.
Inventors
- 👤 Oskar Weissel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:53
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/38; B01J23/54; B01J23/56; B01J23/64; B01J23/656; B01J23/6562
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
33 words
A supported ruthenium catalyst comprising ruthenium disposed on a catalyst support comprising a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst additionally containing an inorganic and/or organic alkali metal compound.
Claim 2
Dependent Claim
33 words
A supported ruthenium catalyst comprising ruthenium disposed on a catalyst support comprising a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst additionally containing an inorganic and/or organic alkali metal compound.
Claim 3
Dependent Claim
50 words
A catalyst according to claim 1 wherein said inorganic and/or organic alkali metal compound is an oxide, hydroxide, alcoholate, carbonate, bicarbonate or carboxylic acid salt with up to 7 carbon atoms of an alkali metal and/or the reaction product thereof with a chromium and/or manganese compound contained in the catalyst.
Claim 4
Dependent Claim
57 words
A catalyst according to claim 1 wherein the inorganic and/or organic alkali metal compound is lithium hydroxide, sodium oxide, sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium methylate, sodium ethylate, sodium acetate, potassium oxide, potassium hydroxide, potassium carbonate, potassium methylate, rubidium hydroxide and/or a reaction product thereof with a chromium compound or manganese compound contained in the catalyst.
Claim 5
Dependent Claim
28 words
A catalyst according to claim 1 wherein the alkali metal compound is present in an amount, calculated as the oxide, of from 0.05 to 15 percent by weight.
Claim 6
Dependent Claim
24 words
A catalyst according to claim 1 wherein the content of alkali metal compound, calculated as the oxide, is 0.1 to 10 percent by weight.
Claim 7
Dependent Claim
76 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium disposed on a support of a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst containing an organic and/or inorganic alkli metal compound which comprises contacting a catalyst comprising ruthenium disposed on a support of an oxide, hydroxide or hydrated oxide of chromium and manganese with a solution of an organic and/or inorganic alkali metal compound and thereafter drying the so-treated support.
Claim 8
Dependent Claim
76 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium disposed on a support of a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst containing an organic and/or inorganic alkli metal compound which comprises contacting a catalyst comprising ruthenium disposed on a support of an oxide, hydroxide or hydrated oxide of chromium and manganese with a solution of an organic and/or inorganic alkali metal compound and thereafter drying the so-treated support.
Claim 9
Dependent Claim
41 words
A process according to claim 6 wherein the organic and/or inorganic alkali metal compound is an oxide, hydroxide, alcoholate, carbonate, bicarbonate of an alkali metal or an alkali metal salt of a lower carboxylic acid having up to 7 carbon atoms.
Claim 10
Dependent Claim
39 words
A process according to claim 6 wherein the alkali metal compound is lithium hydroxide, sodium oxide, sodium hydroxide, sodium carbonate, sodium bicarbonate, sodium methylate, sodium ethylate, sodium acetate, potassium oxide, potassium hydroxide, potassium carbonate, potassium methylate or rubidium hydroxide.
Claim 11
Dependent Claim
21 words
A process according to claim 6 wherein the concentration of alkali metal compound in the solution is 0.02 to 5 normal.
Claim 12
Dependent Claim
30 words
A process according to claim 6 wherein the catalyst support is one obtained by heating an ammonium manganese chromate at a temperature in the range of 200 to 450° C.
Claim 13
Dependent Claim
60 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium supported on a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst also containing an alkali metal compound which comprises disposing ruthenium on a catalyst support which has been obtained by heating a mixed alkali metal manganese chromate to a temperature of 200° to 450° C.
Claim 14
Dependent Claim
60 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium supported on a hydroxide, hydrated oxide or oxide of chromium and manganese, said catalyst also containing an alkali metal compound which comprises disposing ruthenium on a catalyst support which has been obtained by heating a mixed alkali metal manganese chromate to a temperature of 200° to 450° C.
Claim 15
Dependent Claim
49 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium supported on a support of a hydroxide, hydrated oxide or oxide of chromium and manganese which comprises heating a mixed alkali metal ammonium manganese chromate to a temperature of 200° to 450° C. and disposing ruthenium thereon.
Claim 16
Dependent Claim
49 words
A process for the preparation of a supported ruthenium catalyst comprising ruthenium supported on a support of a hydroxide, hydrated oxide or oxide of chromium and manganese which comprises heating a mixed alkali metal ammonium manganese chromate to a temperature of 200° to 450° C. and disposing ruthenium thereon.
Claim 17
Dependent Claim
29 words
A process according to claim 11 wherein the catalyst is thereafter treated with a solution of organic and/or inorganic alkali metal compound and the so-treated support is thereafter dried.
Claim 18
Dependent Claim
30 words
A process according to claim 12 wherein the catalyst is thereafter treated with a solution of an organic or inorganic alkali metal compound and the so-treated support is thereafter dried.
Claim 19
Dependent Claim
30 words
A process for the catalytic hydrogenation of an aromatic amine which comprises contacting an aromatic amine with a source of hydrogen in the presence of the catalyst of claim 1.
Claim 20
Dependent Claim
73 words
A process according to claim 15 wherein the aromatic amine is one of the formula ##STR12## wherein R 1 , R 2 , R 3 and R 4 are identical or different and represent hydrogen or an alkyl radical, n represents the numbers 0 or 1. m represents the numbers 1, 2 or 3, and R 5 represents hydrogen or an optionally substituted monovalent, divalent or trivalent aliphatic, cycloaliphatic, araliphatic or aromatic radical.
Claim 21
Dependent Claim
55 words
A process according to claim 15 wherein the aromatic compound undergoing hydrogenation is a mixture of condensation products of aniline and formaldehyde of the general formula ##STR13## wherein P represents the numbers 0 and 1 to 5 and the hydrogenation is performed without prior separation of the components of the mixture into the individual constituents.
Claim 22
Dependent Claim
44 words
A process according to claim 17 wherein the reactant has a dinuclear component where p=0 of more than 50 percent by weight and a content of compounds which are tetranuclear and greater than tetranuclear (p=2 to 5) of less than 30 percent by weight.
Claim 23
Dependent Claim
46 words
A process according to claim 17 wherein the starting product has a dinuclear content where p=0 of more than 60 percent by weight and a content of compounds which are tetranuclear and more than tetranuclear where p=2 to 5 of less than 15 percent by weight.
References Cited (Backward Citations)
US3636108A
Cited
US3894965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-01-28 | 1983-07-30 | 1984-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-28 | 1987-07-30 | 1988-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-28 | 1991-07-30 | 1992-01-29 | $7700.00 | Window Closed / Lapsed |