| abstract |
Supported silver catalysts which contain one or more alkali metals are prepared in a two-stage process by doping a basic catalyst which contains silver in metallic form and may also contain lithium with the heavy alkali metal sodium, potassium, rubidium and/or cesium using an impregnating solution which contains the heavy alkali metal and one or more nitrates of the general formula R+NO3- wherein R+ is an ammonium, hydrazinium, C1-C12-monoalkylammonium, C2-C12-dialkylammonium, C3-C12-trialkylammonium or C4-C12-tetraalkylammonium cation. |