| abstract |
1500020 Hydrogenation catalyst HOECHST AG 14 July 1975 [16 July 1974] 29409/75 Heading B1E [Also in Division C2] Catalysts comprise (a) silicon dioxide, (b) aluminium oxide and/or a rare earth oxide and (c) nickel, cobalt or copper or a mixture of any two or all three thereof. They may be prepared by impregnating a silica/alumina or silica/rare earth support with a Ni, Co or Cu salt, converting to hydroxide and reducing with hydrogen; alternatively the hydroxide or oxide hydrates of all components may be coprecipitated at a pH of 7-8 from an aqueous solution, the precipitate reduced with hydrogen and then calcined. |