Process for the production of primary and/or secondary amines from oxo compounds
AssigneeDegussa AG
InventorsThomas Haas, Dietrich Arntz, Karl-Ludwig Weber, Willi Hofen, Stefan Wieland
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AssigneeDegussa AG
InventorsThomas Haas, Dietrich Arntz, Karl-Ludwig Weber, Willi Hofen, Stefan Wieland
Estimating the term…
This invention relates to a process for the production of primary and/or secondary amines from oxo compounds by catalytic imination of the oxo compound with ammonia or a primary amine and subsequent hydrogenation. Imination proceeds according to the invention in the presence of a novel imination catalyst, namely an organopolysiloxane containing sulphonate groups. This imination catalyst is distinguished by elevated activity. The process is in particular suitable for the production of isophorone diamine from isophorone nitrile, wherein it has proved possible to reduce the content of secondary products and to increase yield.
In a process for the production of a primary amine from an oxo compound selected from the group consisting of aliphatic, cycloaliphatic, aromatic and heteroaromatic aldehydes and ketones, which oxo compound may optionally contain further groups capable of reduction, which comprises iminating the oxo compound in the presence of a imine-forming catalyst and in the presence or absence of an organic solvent with excess ammonia to produce the primary amine and hydrogenating the resultant reaction product with hydrogen in the presence of a hydrogenation catalyst at a temperature in the range from 20.degree. to 250.degree. C. and a pressure in the range from 0.5 to 25 MPa,
Dependencies are inferred from the claim text.