Epoxidation catalyst and a process for its preparation

Details Epoxidation catalyst and a process for its preparation Epoxidation catalyst and a process for its preparation

B - Operations, Transporting

01

J

B01J 23/89 (2006.01) B01J 23/68 (2006.01)

Patent

CA 2171549

This invention relates to an epoxidation catalyst having improved selectivity stability, comprising silver, a promoting amount of alkali metal, a promoting amount of rhenium, a promoting amount of nickel and, optionally, a promoting amount of rhenium co-promoter selected from sulphur, molybdenum, tungsten, chromium and mixtures thereof, on a porous refractory support. Preferably, the nickel has been deposited on the catalyst by post-impregnating the catalyst by a non-aqueous solution of the nickel.

L'invention se rapporte à un catalyseur d'époxydation ayant une meilleure stabilité de sélectivité, comprenant de l'argent, une quantité activante de métal alcalin, de rhénium, de nickel, ainsi que, le cas échéant, une quantité activante d'un co-promoteur de rhénium choisi parmi le soufre, le molybdène, le tungstène, le chrome et des mélanges de ceux-ci, ces métaux étant déposés sur un support réfractaire poreux. De préférence, le nickel a été déposé sur le catalyseur par imprégnation ultérieure de celui-ci dans une solution non aqueuse dudit nickel.

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