Abstract
The effect of reduction on the cumene conversion activity of a series of fluoride-impregnated, alumina-supported cobalt-molybdenum catalysts has been investigated. Such catalysts exhibit two different types of Brønsted acid sites, one associated with the molybdenum and the other the with fluorided alumina surface. Reduction with H 2 eliminates the former type of site, but does not affect the latter. Reduction does not affect the activity of the alumina catalyst which is impregnated only with fluoride, but conversions for the other catalysts are reduced by 2–10%. In hydrocracking experiments, the dramatic influence of fluoride impregnation on cumene conversion and the synergistic nature of the fluoride and cobalt/molybdenum are demonstrated.
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