B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
252/1
B01J 37/12 (2006.01) B01J 29/06 (2006.01) B01J 37/02 (2006.01) B01J 37/16 (2006.01)
Patent
CA 1309079
A B S T R A C T Process for the preparation of a metal-containing supported catalyst wherein the concentration of at least one metal or metal compound is considerably lower in the outer layer of the catalyst than in the inner portion of the catalyst, comprising contacting an aqueous solution of an appropriate metal compound with a reducing agent or an oxidizing agent resulting in a redox reaction either (a) generating hydrogen ions during contact with a basic reacting preshaped support, or (b) generating hydroxyl ions during contact with an acidic reacting preshaped support. The resulting catalyst, which may have an egg-shell or an egg-yolk type distribution for the catalytically active component, may conveniently be employed in processes wherein it is preferred that the catalytically active component is present in a selected part of the shaped support. They may be used, for example, in diffusion limited processes as well as in processes wherein the feedstock may contain catalyst poisons, e.g. in residue conversion.
544090
de Jong Krijn Pieter
Shell Canada Limited
Smart & Biggar
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