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AssigneeBASF SE
InventorsHermann Luyken, Frank Ohlbach, Andreas Ansmann, Peter Bassler, Rolf Fischer, Johann-Peter Melder, Martin Merger, Alwin Rehfinger, Guido Voit, Günther Achhammer
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A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile by a) hydrogenating adiponitrile in the presence of a catalyst comprising an element of the eighth transition group as catalytically active component, to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, b) distillatively removing hexamethylenediamine from the mixture comprising 6-aminocapronitrile, hexamethylenediamine, adiponitrile and high boilers, and either cl) distillatively removing 6-aminocapronitrile, and then d1) distillatively removing adiponitrile, or c2) simultaneously distillatively removing 6-aminocapronitrile and adiponitrile into separate fractions is characterized by base of column temperatures below 185° C. in steps d1) or c2).
A process for the coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile, which comprises the steps of
Dependencies are inferred from the claim text.