Other

E.i. Dupont De Nemours and Company

Dsm N.v.

Robert Pestman

Frank Edward Herkes

Lambertus H W M Van Lieshout

Jeroen Af Boogers

Process for preparing an aqueous mixture of &egr;-caprolactam and 6-aminocaproic acid and/or 6-aminocaproamide which involves, as the reductive amination step, contacting 5-formylvaleric acid and/or an alkyl 5-formylvalerate in water as solvent with hydrogen and an excess of ammonia in the presence of a ruthenium on carrier, as a catalyst, wherein the carrier is titanium oxide, zirconium oxide, graphite or carbon and the catalyst also contains at least one of the metals of group 8-11, or a compound of these metals. The aqueous mixture can be used to prepare &egr;-caprolactam.

Process to continuously prepare an aqueous mixture of &egr;-caprolactam and &egr;-caprolactam precursors

This continuous process for preparing an aqueous mixture of .di-elect cons.-caprolactam and 6-aminocaproic acid and/or 6-aminocaproamide by involves, as the reductive amination step, continuously contacting 5-formylvaleric acid or an alkyl 5-formylvalerate in water as solvent with hydrogen and an excess of ammonia in the presence of a ruthenium on carrier, as a catalyst, wherein the carrier is at least one of titanium oxide or zirconium oxide. The aqueous mixture can be used to prepare .di-elect cons.-caprolactam.

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Eindhoven, Netherlands

Robert Pestman