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US 6,207,824 B1Granted
Purification of N-substituted lactams
AssigneeBASF SE
InventorsErhard Henkes, Gabriele Iffland, Jürgen Ciprian
Life of this patent
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Abstract
A process for reducing the amine content of amine-contaminated N-substituted lactams comprises treating the contaminated N-substituted lactams with an acid macroporous cation exchanger.
Claims11
A process for reducing the amine content of amine-contaminated N-substituted lactams, which comprises treating the contaminated N-substituted lactams with an acid macroporous cation exchanger.
Dependencies are inferred from the claim text.