Caprolactam production process

Details Caprolactam production process Caprolactam production process

C - Chemistry, Metallurgy

07

D

C07D 201/08 (2006.01) B01J 21/06 (2006.01) B01J 37/06 (2006.01) C07D 223/10 (2006.01)

Patent

CA 2302440

The invention relates to a process for producing cyclic lactams by reacting aminocarboxylic acid nitriles with water, in liquid phase, in a fixed bed reactor, in the presence of a catalyst containing a catalytically active oxide comprising no soluble constituent under the reaction conditions. This process is characterised in that the catalyst is composed of shaped bodies which can be obtained by shaping the oxide into shaped bodies and by treating the oxide with an acid which is hardly soluble, having 0.1 to 30 % by weight of the oxide, before or after the shaping process.

L'invention concerne un procédé de production de lactames cycliques par réaction de nitriles d'acide aminocarboxylique avec de l'eau en phase liquide, dans un réacteur à lit fixe, en présence d'un catalyseur contenant un oxyde catalytiquement actif qui ne présente aucun constituant soluble dans les conditions de réaction. Ce procédé se caractérise en ce que le catalyseur est constitué de corps moulés qui peuvent être obtenus par moulage de l'oxyde, qui donne des corps moulés et traitement de cet oxyde, avant ou après le moulage, avec 0,1 à 30 % en poids, par rapport à l'oxyde, d'un acide dans lequel celui-ci est difficilement soluble.

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