Epoxidation process with zeolite catalysts

Details Epoxidation process with zeolite catalysts Epoxidation process with zeolite catalysts

C - Chemistry, Metallurgy

07

D

C07D 301/12 (2006.01)

Patent

CA 2342819

The selectivity of an olefin epoxidation process catalyzed by a titanium- containing zeolite is improved by performing the epoxidation in the presence of a non-ionic tertiary amine or tertiary amine oxide additive. For example, when hydrogen peroxide is reacted with propylene in the presence of TS-1 titanium silicalite to form propylene oxide, non-selective ring-opening reactions of the propylene oxide are suppressed when low concentrations of 2,6-lutidine or other substituted pyridines are added to the hydrogen peroxide feed.

On peut améliorer la sélectivité d'une époxydation oléfinique catalysée par une zéolite renfermant du titane en réalisant cette époxydation en présence d'une amine tertiaire non ionique ou d'un additif d'oxyde d'amine tertiaire. Par exemple, lorsqu'on fait réagir du peroxyde d'hydrogène avec du propylène en présence de solicalite de titane TS-1 pour former de l'oxyde de propylène, on supprime les réactions d'ouverture de cycle non sélectives de l'oxyde de propylène par l'addition de faibles concentrations de 2,6-lutidine ou autres pyridines substituées à la charge de peroxyde d'hydrogène.

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