Process for producing pyrrolidone and n-alkyl pyrrolidones

Details Process for producing pyrrolidone and n-alkyl pyrrolidones Process for producing pyrrolidone and n-alkyl pyrrolidones

C - Chemistry, Metallurgy

07

D

C07D 207/267 (2006.01) C07D 201/08 (2006.01) C07D 315/00 (2006.01)

Patent

CA 2129649

The invention relates to a process for producing pyrrolidone and N-alkyl pyrrolidones from saturated or unsaturated 1,4-dicarboxylic acids or their anhydrides; hydrogen; and a primary amine or ammonia, characterized in that the dicarboxylic acid or its anhydride is allowed to react in an appropriate reactor with hydrogen via a first catalyst bed and the unisolated intermediate product is subsequently reacted with the primary amine or ammonia directly via a second, downstream catalyst bed.

'invention concerne un procédé de production de pyrrolidone et de N-alkyl-pyrrolidones à partir d'acides 1,4-dicarboxyliques saturés ou insaturés ou de leurs anhydrides, d'hydrogène et d'une amine primaire ou d'ammoniac, caractérisé par le fait qu'on permet à l'acide dicarboxylique ou à son anhydride de réagir dans un réacteur approprié avec l'hydrogène par l'intermédiaire d'un premier lit catalytique et que le produit intermédiaire non isolé réagit ensuite avec l'amine primaire ou l'ammoniac directement par l'intermédiaire d'un second lit catalytique situé en aval.

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