Ceramic catalyst carriers for the expoxidation of olefins

Details Ceramic catalyst carriers for the expoxidation of olefins Ceramic catalyst carriers for the expoxidation of olefins

B - Operations, Transporting

01

J

B01J 32/00 (2006.01) B01J 21/04 (2006.01) B01J 21/12 (2006.01) B01J 23/66 (2006.01) B01J 35/10 (2006.01) B01J 37/00 (2006.01)

Patent

CA 2477067

The selectivity and activity of a silver-based olefin epoxidation catalyst is found to be a function of the pore size distribution in the alumina carrier on which it is deposited. Specifically it is found advantageous to provide a carrier which has a minimum of very large pores, ( greater than 10 micrometers) and a water absorption of 35 to 55% and a surface area of at least 1.0 m2 /g. A method of making such carriers is also described.

On a découvert que la sélectivité et l'activité d'un catalyseur d'époxydation d'oléfine à base d'argent est une fonction de la distribution granulométrique des pores dans le support d'alumine sur lequel le catalyseur est déposé. Plus précisément, on a découvert qu'un support comprenant un minimum de très grands pores (supérieurs à 10 micromètres) et une absorption aqueuse comprise entre 35 et 55 %, ainsi qu'une surface active inférieure à 1,0 m?2 ¿/g présentait un caractère avantageux. L'invention concerne également un procédé de fabrication de tels supports.

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