Calcium carbonate carrier for making silver based...

B - Operations – Transporting – 01 – J

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B01J 23/66 (2006.01) B01J 23/02 (2006.01) B01J 37/02 (2006.01) C07D 301/10 (2006.01)

Patent

CA 2500238

The invention relates to a process for preparing a catalyst which involves (a) preparing a paste having a uniform mixture of at least one alkaline earth metal carbonate; a liquid medium; a silver bonding additive; and, at least one extrusion aid and/or optionally a burnout additive; (b) forming one or more shaped particles from the paste; (c) drying and calcining the particles; and, (e) impregnating the dried and calcined particles with a solution containing a silver compound. The invention also relates to a process for preparing an olefin oxide comprising reacting a gas composition containing an olefin having at least two carbon atoms with oxygen in the presence of the catalyst composition obtained by the process of this invention.

L'invention concerne un processus de préparation d'un catalyseur qui consiste à (a) préparer une pâte possédant un mélange uniforme d'au moins un carbonate métallique alcalino-terreux, un milieu liquide, un additif d'adhésivité de l'argent, et au moins une aide à l'extrusion et/ou, facultativement, un additif épuisé, (b) former au moins une particule formée à partir de la pâte, (c) sécher et calciner les particules, et (e) imprégner les particules séchées et calcinées avec une solution renfermant un composé d'argent. Cette invention a aussi trait à un processus de préparation d'un oxyde d'oléfines qui consiste à faire réagir une composition de gaz renfermant une oléfine pourvue d'au moins deux atomes de carbone avec de l'oxygène en présence de la composition de catalyse obtenue par le processus de cette invention.

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