platinum catalyst showed virtually unchanged activity in general the data show that the selectivity to ceda is inferior to that obtained with a platinum catalyst at period 22 the cyclohexanone was diluted 1 1 with isopropyl alcohol in an attempt to avoid bed plugging arising from solids formation but without a great deal of success it was also independently observed that there was significant leaching of palladium from the catalyst bed into the reaction product mixture table 2______________________________________effect of palladium as catalystperi mole ratio temp conversion sup b selectivityod eda ketone sup a u00b0 c mole ceda diceda______________________________________ 2 6 1 180 99 4 99 3 2 8 3 6 1 180 99 5 88 4 4 9 4 6 1 180 99 5 99 7 2 1 6 5 1 180 99 6 88 1 3 2 7 5 1 185 99 6 92 3 3 5 8 5 1 181 99 5 92 4 2 310 3 1 180 99 7 86 5 4 311 3 1 193 99 5 88 6 6 912 3 1 181 99 7 95 3 5 615 6 1 200 99 5 91 2 2 316 6 1 199 99 4 96 9 2 417 6 1 200 99 9 75 7 2 519 6 1 251 99 5 54 8 3 320 6 1 250 99 5 58 5 6 421 6 1 249 99 5 59 3 3 923 6 1 180 100 0 87 4 7 624 6 1 179 100 0 78 8 3 025 6 1 179 100 0 70 1 2 9______________________________________ sup a ketone was cyclohexanone sup b conversion of cyclohexanone this run was performed using as a catalyst 0 8 weight percent palladium supported on charcoal 4 u00d7 8.