Catalysts based on metallic oxides, with high dispersion, comprising in particular zirconia, their manufacture and their applications.

摘要

Catalyst including at least one zirconium oxide, characterised in that at least 85 % of its weight consists of a thermally stable support with a specific surface greater than or equal to 150 m2/g containing from 60 to 99 % by weight of at least one zirconium oxide and from 40 to 1 % by weight of at least one metal oxide of at least one metal chosen from the group consisting of the metals of groups V, VI and VII, noble metals such as ruthenium, osmium, rhodium, iridium and uranium, and the elements phosphorus, arsenic and sulphur, the support being obtained by the molten salts technique by introducing this mixture of oxides into a eutectic mixture of alkali metal nitrates or sulphates which, after dehydration, is maintained between 250 and 550 DEG C, for 30 minutes to 5 hours.