Claims
- 1. A catalyst suitable for preparing aliphatic alpha, omega-aminonitriles by partial hydrogenation of aliphatic dinitriles, comprising
- (a) metallic cobalt, or a mixture of metallic cobalt and a cobalt compound, the proportion of metallic cobalt based on (a) being from 20 to 100% by weight,
- (b) from 10 to 70% by weight, based on (a), of metallic iron, iron oxide, a further iron compound or a mixture thereof, the proportion of iron oxide based on (b) being from 20 to 100% by weight,
- (c) from 0 to 1% by weight, based on the sum of (a) and (b), of a compound based on an alkali metal, an alkaline earth metal or zinc.
- 2. A catalyst as claimed in claim 1 in the form of an unsupported catalyst.
- 3. A catalyst as claimed in claim 1 in the form of a supported catalyst.
- 4. A process for preparing aliphatic alpha, omega-aminonitriles by partial hydrogenation of aliphatic dinitriles at elevated temperature and elevated pressure in the presence of a catalyst as claimed in claim 1.
- 5. A process as claimed in claim 4, wherein the hydrogenation is effected in a fixed bed reactor.
- 6. A process as claimed in claim 4, wherein adiponitrile is used as the alpha, omega-dinitrile to obtain 6-aminocapronitrile.
- 7. A process as claimed in claim 1, wherein the hydrogenation is carried out at a pressure within the range from 2 to 30 MPa.
- 8. A process as claimed in claim 1, wherein the hydrogenation is carried out at a temperature within the range from 20 to 150.degree. C.
Priority Claims (1)
Number |
Date |
Country |
Kind |
196 36 768 |
Sep 1996 |
DEX |
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Parent Case Info
This application is a 371 of PCT/EP97/04547 filed Aug. 21, 1997.
PCT Information
Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
PCT/EP97/04547 |
8/21/1997 |
|
|
1/7/1999 |
1/7/1999 |
Publishing Document |
Publishing Date |
Country |
Kind |
WO98/11058 |
3/19/1998 |
|
|
US Referenced Citations (5)
Foreign Referenced Citations (7)
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WOX |
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WOX |
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Jun 1993 |
WOX |
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Aug 1993 |
WOX |
9618603 |
Jun 1996 |
WOX |
Non-Patent Literature Citations (1)
Entry |
Jrl. Of Cat. 112, 145-156 (1988). |