| 摘要 |
1312708 Dehydrogenation catalyst UNIVERSAL OIL PRODUCTS CO 20 Aug 1970 [21 Aug 1969] 40106/70 Heading B1E [Also in Division C5] A catalyst composition comprises a platinum group component, a germanium component, an alkali metal or alkaline earth metal component, and a porous refractory carrier material. The platinum group component is present as elemental metal in a quantity of 0.01-2 wt%, the germanium is in an oxidation state above that of the metal and in a quantity of 0.01-5 wt% and the alkali or alkaline earth metal is present in a quantity of 0.1 to 5wt%. Specified carriers are (a) refractory oxides, e.g. alumina, titania, zirconia, chromia, zinc oxide, magnesia, thoria, boria, silica-alumina, silica-magnesia, chromia-alumina, aluminaboria, and silica-zirconia, (b) activated carbon. Coke, or charcoal, (c) silica, silica gel, silicon carbide, or clays, e.g. attapulgite, kaolin, diatomaceous earth, fullers earth, (c) ceramics, porcelain, crushed firebrick, or bauxite, or (d) crystalline aluminosilicates, e.g. mordenite and/or faugasite. The germaium components may suitably be present as the oxide, sulphide, halide or oxychloride. The composition is suitably formed by impregnation followed by calcination and then reduction e.g. by hydrogen, and sulphiding. In the Examples gamma alumina containing less than 0.1wt% combined chloride is impregnated with a solution of metallic germanium in chlorine water and a solution containing chloroplatinic acid and nitric acid. This is then followed by impregnation with aqueous lithium or potassium nitrate. |
