Catalyst for selective oxidation of unsaturated hydrocarbons and

Details Catalyst for selective oxidation of unsaturated hydrocarbons and Catalyst for selective oxidation of unsaturated hydrocarbons and

1997-10-18

1999-09-07

Warden, Jill

Chemistry: analytical and immunological testing

Testing of catalyst

436142, 436159, 422177, 502208, 502304, G01N 3110

Patent

active

059486830

ABSTRACT:
A selective catalytic material is used to catalyze selective oxidation of unsaturated hydrocarbons, e.g., olefins, in the presence of carbon monoxide. The catalytic material comprises phosphated ceria containing from 0.1 to 20, preferably from 1 to 5, percent by weight phosphate component (calculated as elemental phosphorus). The phosphated ceria may be made by mixing particles of ceria and a solution containing phosphates to disperse the desired amount of phosphate component on the ceria and calcining the particles after separation of them from the solution. The resulting selective catalytic material is contacted under oxidizing conditions with a gas stream containing an oxidant, e.g., air, carbon monoxide and one or more unsaturated hydrocarbons. The selective catalytic material (24a) may be disposed on a sensor (24) disposed within a conduit (18) downstream of a conventional treatment catalyst (16) to evaluate the performance of the latter by measuring the extent of unsaturated hydrocarbon oxidation catalyzed by the selective catalytic material (24a) in the treated gas.

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