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Method for separating an azepine derivative out of a mixture containing an amine an azepine derivative

  • US 7,147,757 B2
  • Filed: 03/06/2001
  • Issued: 12/12/2006
  • Est. Priority Date: 03/08/2000
  • Status: Expired due to Fees
First Claim
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1. A process for distillative removal of part or all of an azepine derivative (III) selected from the group consisting of tetrahydroazepine, 2-aminoazepan, N-(2-azepano)-1,6-diaminohexane and N-(2-azepano)-6-aminocapronitrile from a mixture (II) comprising an azepine derivative (III) and an amine (I), which comprises conducting the distillation at a pot temperature of not more than 120°

  • C., and wherein the distillation provides said azepine derivative (III) predominantly as bottom product (VI) and said bottom product (VI) is subjected to a hydrogenation.

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