Determination of the number of active sites of palladium-containing hydrogenation catalysts by batched introduction of carbon monoxide as inhibitor

1. Using a method of batched introduction of carbon monoxide as inhibitor, determination was made of the upper limit of the relative number of active sites of palladium-containing catalysts for hydrogenation of unsaturated compounds. 2. For a homogeneous catalyst which was a complex of palladium chloride for trinonylamine and for one deposited on mineral supports, the number of active sites (for the unsaturated compounds investigated) constituted 5–12%, of the total quantity of palladium in the system.