Polyamide production process

Details Polyamide production process Polyamide production process

C - Chemistry, Metallurgy

08

G

C08G 69/14 (2006.01) C08G 69/04 (2006.01) C08G 69/16 (2006.01) C08G 69/46 (2006.01)

Patent

CA 2310085

A process is disclosed for producing polyamides. The extracted water produced from polyamide extraction is concentrated up to an extract content of maximum 85 wt.% and is mixed with fresh lactam up to a 0.5-13 wt.% water content, at least one adiabatic stress relief being carried out during polymerisation.

L'invention concerne un procédé pour la production de polyamides. L'eau extraite produite à partir d'une extraction de polyamide est concentrée jusqu'à l'obtention d'une teneur en extrait d'au maximum 85 % en poids et est mélangée avec du lactame frais jusqu'à l'obtention d'une teneur en eau de 0,5 à 13 % en poids, au moins une relaxation adiabatique étant effectuée pendant la polymérisation.

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