Thorium precipitation catalysts

This section of the review considers several recent developments in catalysts for low to medium pressure methanol synthesis that could be used in existing converters. These include the Raney copper-zinc catalysts, which have similar compositions and properties to co-precipitated catalysts, thorium-copper and cesium-copper intermetallics and supported noble metals... 

The first type was a nickel-thorium-kieselguhr precipitation catalyst and the second type a nickel-manganese-aluminum-kieselguhr precipitation catalyst. 

The best nickel-thorium oxide catalyst (100 Ni 18Th02 100 kieselguhr) was also precipitated with potassium carbonate and showed... 

Fischer and Pichler resumed such experiments at varied pressures during the winter of 1935-1936. They used cobalt-thorium-kieselguhr precipitation catalysts for the synthesis at increased pressures and found a very interesting behavior of the catalysts at pressures of 5-20 atm. (medium pressure) ... 

The details of preparation and reduction of the Co-ThOj-MgO-kieselguhr catalyst are described in CIOS reports (41-49) and other publications (34, 35, 36). A solution of cobalt and thorium nitrates is mixed with sodium carbonate solution so as to completely precipitate the cobalt and thorium carbonates. A slurry of magnesium oxide and kieselguhr is... 

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