Title:
ヘキサメチレンジアミン(HMD)、アミノカプロニトリルおよびポーラログラフ的還元性不純物(PRI)の混合物から、低PRIのHMDを回収する方法
Document Type and Number:
Japanese Patent JP2004513105
Kind Code:
A
Abstract:
A method for separating a mixture of hexamethylenediamine, aminocapronitile and polarographically reducible impurities using fractional distillation in which the temperature in the rectifying zone of a distillation column varies sigmoidally along its length to force a major portion of the PRI to co-distill with the aminocapronitrile.
Inventors:
John Joseph Ostermeier
Leon S. Scott
Leon S. Scott
Application Number:
JP2002539302A
Publication Date:
April 30, 2004
Filing Date:
August 21, 2001
Export Citation:
Assignee:
E.I.DU PONT DE NEMOURS AND COMPANY
International Classes:
C07C209/86; C07C211/12; (IPC1-7): C07C209/86; C07C211/12
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe