| 摘要 |
Maleic anhydride can be hydrogenated to succinic anhydride with particularly high conversion rates by a catalytic liquid-phase hydrogenation with hydrogen, by carrying out the hydrogenation continuously at a pressure of 10 to 400 bar and a reaction temperature of 60 to 180 DEG C. on oxygen-free and support-free shaped bodies, which are arranged in the fixed bed, of compressed powders of the elements of the iron sub-group of group VIII of the Periodic Table, mixed or alloyed with elements of transition group IV and/or V; in addition, hydrogenation-inert elements can be present. The shaped bodies have a compressive strength of 20 to 220 N and an internal surface area of 10 to 100 m2/g.
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