Process for simultaneously preparing 6-aminocapronitrile and hexamethylene diamine
AssigneeBASF SE
InventorsHermann Luyken, Guido Voit, Peter Bassler, Alwin Rehfinger, Rolf Fischer
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Abstract
A process for coproduction of 6-aminocapronitrile and hexamethylenediamine starting from adiponitrile comprises (1) partially hydrogenating adiponitrile in the presence of a catalyst to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine and adiponitrile, (2) removing 6-aminocapronitrile and hexamethylenediamine from the mixture, (3) adding to the portion comprising essentially adiponitrile from 0.01 to 10% by weight of an acid, based on adiponitrile, or an acidic ion exchanger and removing the adiponitrile from the mixture, and (4) recycling the adiponitrile into step (1).
Claims12
A process for coproduction of 6-aminocapronitrile and hexa-methylonediamine starting from adiponitrile, which comprises
- (1) partially hydrogenating adiponitrile in the presence of a catalyst to obtain a mixture comprising 6-aminocapronitrile, hexamethylenediamine and adiponitrile,
- (2) removing 6-aminocapronitrile and hexamethylenediamine from the mixture,
- (3) adding to the mixture comprising adiponitrile from 0.01 to 10% by weight of an acid, based on adiponitrile, or an acidic ion exchanger and removing the adiponitrile from the mixture, and
- (4) recycling the adiponitrile into step (1).
Dependencies are inferred from the claim text.