Supported catalyst with a defined pore distribution in the mesopore range
AssigneeBASF SE
InventorsMarkus Schubert, Jurgen Stephan, Volker Bohm, Andreas Brodhagen, Frank Poplow, Christian Weichert, Holger Borchert
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Abstract
Supported catalyst comprising a support (S) in which Al2O3 is present in a proportion of at least 75% by weight and rhenium compounds as active component (A), wherein the maximum of the distribution function of the pore diameters in the mesopore range is at from 0.008 to 0.050 μm.
Claims16
A supported catalyst comprising a support (S) in which Al2O3 is present in a proportion of at least 75% by weight and rhenium compounds as active component (A), wherein the maximum of the distribution function of the pore diameters in the mesopore range is from 0.008 to 0.050 μm.
The process according to claim 10, wherein the support (S) having a maximum of the distribution function of the pore diameters in the mesopore range at from 0.008 to 0.050 μm is produced by aging an aluminum alkoxide at a water vapor pressure of from 1 to 30 bar and a temperature of from 100 to 235° C., for from 0.5 to 20 hours while stirring at a circumferential velocity of from 1.0 to 6.0 m/s and drying and if appropriate shaping the resulting synthetic aluminum hydroxide.
The process according to claim 11, wherein supports (S) having a maximum of the distribution function of the pore diameters in the mesopore range at from 0.008 to 0.050 μm are produced by
- preparing an alumina sol from a synthetic aluminum hydroxide prepared according to claim 11 by suspending the alumina hydrate in dilute mineral acid having a concentration of from 1 to 5% and subsequently adding from 1 to 10% by weight, based on the total weight of the sol, of urea,
- introducing the alumina sol dropwise into a shaping column whose lower part is filled with aqueous ammonia solution, and
- drying the spherical particles formed in the shaping column.
Dependencies are inferred from the claim text.