EP 2646493 A1 20131009 - METHOD OF MAKING POLYAMIDE 66
Title (en)
METHOD OF MAKING POLYAMIDE 66
Title (de)
VERFAHREN ZUR HERSTELLUNG VON POLYAMID 66
Title (fr)
PROCÉDÉ DE FABRICATION DE POLYAMIDE 66
Publication
Application
Priority
- EP 10193471 A 20101202
- NL 2011050824 W 20111201
- EP 11794254 A 20111201
Abstract (en)
[origin: EP2460839A1] Disclosed is a process for the preparation of polyamide 66 from an aqueous solution of hexamethylene diamine adipic acid salt (AH salt), wherein a solution of AH salt is first concentrated. The concentration is done in at least two steps, by at least two concentrators in series. The staged concentration is combined with subsequent polymerization in a plurality of reactors placed in parallel and operated in a batch mode. The process allows considerable energy-saving, by applying the steam from one concentrator as a heating medium in another concentrator.
IPC 8 full level
C08G 69/26 (2006.01); B01D 1/26 (2006.01); C08G 69/28 (2006.01)
CPC (source: EP)
B01D 1/26 (2013.01); C08G 69/26 (2013.01); C08G 69/28 (2013.01)
Citation (search report)
See references of WO 2012074399A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2460839 A1 20120606; CN 103328539 A 20130925; EP 2646493 A1 20131009; WO 2012074399 A1 20120607
DOCDB simple family (application)
EP 10193471 A 20101202; CN 201180056131 A 20111201; EP 11794254 A 20111201; NL 2011050824 W 20111201