Preparation of a catalyst containing copper and silica

US4780448A · kind A · utility

Assignee

• BASF SE

Inventors

• Franz J. Broecker
• Rolf Fischer · Heidelberg, DE
• Klaus-Dieter Malsch · Schifferstadt, DE
• Wolfgang Reiss · Ludwigshafen, DE
• Rolf Schnabel · Schifferstadt, DE
• Hans-Martin Weitz · Bad Dürkheim, DE

Key dates

• Filing date: Jan 30, 1987
• Grant date: Oct 25, 1988
• Expiry date: Jan 30, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C29/149
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A catalyst containing copper and silica is prepared by a process in which an aqueous alkali metal silicate solution containing from 1 to 26% by weight of SiO.sub.2 is brought to a pH of from 0.5 to 2.0 with nitric acid, an aqueous copper nitrate solution containing from 5 to 15% by weight of Cu is added, after the addition of the nitric acid, so that a clear solution containing from 0.18 to 3.0 moles of Cu per mole of SiO.sub.2 is formed, the resulting solution is mixed with an aqueous alkali metal carbonate solution at from 40.degree. to 80.degree. C., the pH of the mixture being kept at from 7.5 to 8.5, and the precipitated material is separated off, dried, calcined by heating at from 250.degree. to 400.degree. C. and pressed in a conventional manner to give catalyst moldings. The catalyst thus obtained is used for the hydrogenation of dialkyl dicarboxylates to diols.