Return to Russian/Soviet Patent Table of Contents

A Method To Produce Alumina-Based Extrudate And A Method To Produce A Catalyst For The Synthesis Of Hydrocarbons From Synthesis Gas

Abstract

A process for the preparation of an alumina-based extrudate suitable for use in the manufacture of a catalyst, comprises the steps of: i) preparing an extrudable mixture comprising an alumina precursor, a cobalt, iron or nickel source and a solvent; ii) extruding the mixture; and iii) drying the so-formed extrudate. The extrudable mixture may optionally comprise a promoter source. Alternatively, a promoter source may be deposited on the resulting extrudate. A catalyst is prepared by calcination of the resulting extrudate, which catalyst is useful in the preparation of hydrocarbons from methanol or a mixture of carbon monoxide and hydrogen.

Character of invention: an alumina-based extrudate and a catalyst based on the oxides of cobalt, zirconium and aluminum taken in mass ratio (25-70):(12-32):100. The extrudate is produced by mixing a precursor of alumina support (boehmite, pseudoboehmite, gibbsite, or their mixture) with cobalt precursor (cobalt carbonate or nitrate or their mixture) and a solvent, followed by extruding of the obtained mixture and drying. A peptizing agent (acetic acid to the amount of 10-20 mol.% with respect to dry alumina) can be added to the mixture. It is reasonable to add a promoter – IV group metal in a carbonate or hydroxide form. A catalyst can be produced from the said extrudate, which is dried and calcined.