abstract |
The invention relates to a process for thencontinuous purification of crude ε-caprolactam, whereinncrude ε-caprolactam prepared by cyclization of alkyl 6-aminocaproate,n6-aminocapronitrile, 6-amino caproicnacid, 6-aminocaproic amide and/or oligomers thereof, isnpurified by a crystallization process. |