Preparation of a silver catalyst

US5011809A · kind A · utility

Assignee

• BASF SE

Inventors

• Klaus Herzog · Oberkochen, DE
• Karl-Heinz Boehning · Darmstadt, DE
• Heinrich Aichinger · Mannheim, DE
• Juergen Plueckhan · Bischofswerda, DE
• Wolf D. Mross · Bischofswerda, DE
• Matthias Schwarzmann · Schifferstadt, DE

Key dates

• Filing date: Jan 29, 1990
• Grant date: Apr 30, 1991
• Expiry date: Jan 29, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D301/10
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

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 EQU R.sup.+ NO.sub.3.sup.- wherein R.sup.+ is an ammonium, hydrazinium, C.sub.1 -C.sub.12 -monoalkylammonium, C.sub.2 -C.sub.12 -dialkylammonium, C.sub.3 -C.sub.12 -trialkylammonium or C.sub.4 -C.sub.12 -tetraalkylammonium cation.