C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 201/08 (2006.01)
Patent
CA 2268807
The invention concerns a method for treating lactams directly derived from the synthesis process, avoiding as far as possible the formation of oligomers. More precisely it concerns a method for treating a lactam from a reaction flux derived from aromatising hydrolysis of an aminonitrile, characterised in that the reaction flux coming out of a hydrolysis reactor is cooled in a time interval of not more than 1 hour at a temperature not more than 150 DEG C before its fractionation.
La présente invention a trait au traitement de lactames directement issus de leur procédé de synthèse, en évitant le plus possible la formation d'oligomères. Elle consiste plus précisément en un procédé de traitement d'un lactame à partir du flux réactionnel issu d'une hydrolyse cyclisante d'un aminonitrile, caractérisé en ce que le flux réactionnel sortant du réacteur d'hydrolyse est refroidi en un laps de temps inférieur ou égal à 1 heure à une température inférieure ou égale à 150 °C avant son fractionnement.
Chiarelli Henri
Leconte Philippe
Rhodia Fiber And Resin Intermediates
Robic
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