Process for preparing amines by conditioning the catalyst with ammonia
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DEGUSSA AG
- Publication Date
- 2007-08-22
- Estimated Expiration
- Not applicable · inactive patent
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Abstract
Description
technical field
[0001] The present invention relates to a process for the preparation of amines by conditioning a catalyst with ammonia. Background technique
[0002] The preparation of amines and diamines by means of catalytic hydrogenation of the corresponding nitriles or by catalytic reductive amination of aldehydes or ketones is known. Suitable are, for example, nickel, copper, iron, palladium, rhodium, ruthenium and cobalt catalysts.
[0003] For many applications, cobalt and ruthenium catalysts are preferred because of their high selectivity for the formation of primary amines (see, e.g., Jiri Volf and Josef Pasek, "Hydrogenation of Nitriles", Studies in Surface Science and Catalysis, 27( 1986) pp. 105-144; Silvia Gomez et al., "The Reductive Amination of Aldehydes and Ketones and the Hydrogenation of Nitriles: Mechanistic Aspects and Selectivity Control, Adv. Synth. Catal. 344 (2002) pp. 1037-1057).
[0004] Numerous methods have been described in order to increase ...