Preparation of caprolactam
AssigneeRhodia Fiber & Resin Intermediates
InventorsCarl Patois, Michel Spagnol
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Abstract
The present invention concerns the aminomethylation of pentenoic acid derivatives, by reaction with carbon monoxide, hydrogen and ammonia, for preparing caprolactam. More precisely, it is directed to a method for preparing caprolactam wherein the aminomethylation of pentenoic acid derivatives is carried out by reaction with carbon monoxide, hydrogen, and ammonia, at a temperature higher than 30° C. and in the presence of a catalyst with a base of at least one metal of Group VIII of the Periodic Table.
Claims19
Process for the preparation of caprolactam, which comprises reacting pentenoic acids or compounds thereof where the OH group of the pentenoic acids has been replaced by O—R or S—R where R represents an alkyl, cycloalkyl, aralkyl, aryl, or silyl with carbon monoxide, hydrogen and ammonia, in a single stage at a temperature greater than 30° C. and in the presence of a catalyst based on at least one metal from group VIII of the Periodic Classification of the Elements.
Dependencies are inferred from the claim text.