公开(公告)号：EP1539680A1

公开(公告)日：2005-06-15

申请号：EP03764699.9

申请日：2003-07-15

Applicant: INVISTA Technologies S.à.r.l.

Inventor： OSTERMAIER, John, J. ,  SCOTT, Leon, S. ,  HASTINGS, James, D.

IPC: C07C253/34 ,  C07C255/04

CPC classification number: B01D3/143 ,  B01D3/146 ,  C07C253/34 ,  Y10S203/09 ,  Y10S203/20 ,  C07C255/09

Abstract: Process for the recovery of substantially pure adiponitrile (ADN) from a mixture of adiponitrile, aminocapronitrile and hexamthylenediamine, comprising two sequential distillations, the first of which involves distilling the mixture in a distillation column at a head pressure that causes at least 70 % of the ADN to go into the distillate, along with bishexamethylenetriamine (BHMT) and 2-cyanocyclopentylideneimine (CPI), and the second of which involves distilling the distillate in a second distillation column at a head pressure that causes the formation of a distillate comprising a minimum temperature azeotrope between ADN and BHMT and a bottoms product that is ADN substantially free of both BHMT and CPI.

公开(公告)号：EP1539680B1

公开(公告)日：2007-10-17

申请号：EP03764699.9

申请日：2003-07-15

Applicant: INVISTA Technologies S.à.r.l.

Inventor： OSTERMAIER, John, J. ,  SCOTT, Leon, S. ,  HASTINGS, James, D.

IPC: C07C253/34 ,  C07C255/04

CPC classification number: B01D3/143 ,  B01D3/146 ,  C07C253/34 ,  Y10S203/09 ,  Y10S203/20 ,  C07C255/09

Abstract: Process for the recovery of substantially pure adiponitrile (ADN) from a mixture of adiponitrile, aminocapronitrile and hexamthylenediamine, comprising two sequential distillations, the first of which involves distilling the mixture in a distillation column at a head pressure that causes at least 70 % of the ADN to go into the distillate, along with bishexamethylenetriamine (BHMT) and 2-cyanocyclopentylideneimine (CPI), and the second of which involves distilling the distillate in a second distillation column at a head pressure that causes the formation of a distillate comprising a minimum temperature azeotrope between ADN and BHMT and a bottoms product that is ADN substantially free of both BHMT and CPI.

公开(公告)号：EP1328503B1

公开(公告)日：2009-03-04

申请号：EP01962276.0

申请日：2001-08-21

Applicant: INVISTA Technologies S.à.r.l.

Inventor： OSTERMAIER, John, Joseph ,  SCOTT, Leon, S.

IPC: C07C209/86

CPC classification number: C07C209/86 ,  C07C211/12

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.