Process for preparing epoxidation catalysts with improved...

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B01J 37/02 (2006.01) B01J 23/66 (2006.01) B01J 37/06 (2006.01)

Patent

CA 2343784

This invention relates to a process for depositing one or more catalytically reactive metals on a carrier, said process comprising selecting a carrier and depositing a catalytically effective amount of one or more catalytically reactive metals on the carrier, the deposition effected by submersing the carrier in an impregnation solution wherein the hydrogen ion activity of the impregnation solution has been lowered. The invention further relates to catalysts made by the process. In the examples silver and a promotor are deposited on an alumina carrier in the presence of tetraethylammonium hydroxide; the catalysts are used for the preparation of ethylene oxide.

L'invention concerne un procédé qui permet de déposer sur un support un ou plusieurs métaux possédant une activité catalytique. Le procédé consiste à choisir un support, puis à y déposer une quantité catalytiquement active d'un ou de plusieurs métaux possédant une activité catalytique. Pour ce faire, on plonge ledit support dans une solution d'imprégnation dans laquelle l'activité des ions hydrogène est diminuée. L'invention concerne également les catalyseurs produits par ledit procédé. Dans les exemples, on dépose de l'argent et un promoteur sur un support à base d'alumine, en présence d'hydroxyde de tétraéthylammonium. Ces catalyseurs sont utiles pour préparer de l'oxyde d'éthylène.

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