Process to continuously prepare an aqueous mixture of...

Details Process to continuously prepare an aqueous mixture of... Process to continuously prepare an aqueous mixture of...

C - Chemistry, Metallurgy

07

D

C07D 201/08 (2006.01) C07C 227/08 (2006.01) C07C 231/14 (2006.01)

Patent

CA 2342364

Process for preparing an aqueous mixture of .epsilon.-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 .epsilon.-caprolactam.

La présente invention concerne un procédé de préparation d'un mélange aqueux de .epsilon.-caprolactame et de 6-aminocaproique acide et/ou 6-aminocaproamide impliquant comme étape d'amination réductrice la mise en contact dans l'eau de 5-formylvalétique acide et/ou de 5-formalvalérate alkyle comme solvant avec de l'hydrogène et un excédant d'ammoniac en présence de ruthénium sur un support, tel qu'un catalyseur; ce support présentant oxyde de titane, oxyde de zirconium, graphite ou carbone, le catalyseur contenant également au moins un des métaux du groupe 8-11, ou un composé de ces métaux. Par ailleurs, ce mélange peut être utilisé dans la préparation de .epsilon.-caprolactame.

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