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A process for charging a longitudinal section of a catalyst tube with a homogeneous fixed catalyst bed section whose active composition is at least one multielement oxide or comprises elemental silver on an oxidic support body and whose geometric shaped catalyst bodies and shaped inert bodies have a

A process for charging a longitudinal section of a catalyst tube with a homogeneous fixed catalyst bed section whose active composition is at least one multielement oxide or comprises elemental silver on an oxidic support body and whose geometric shaped catalyst bodies and shaped inert bodies have a specific inhomogeneity of their longest dimensions.

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1. A tube bundle reactor comprising at least one catalyst tube which has been charged by a process for charging a longitudinal section of a catalyst tube with a uniform fixed catalyst bed section whose active composition is at least one multielement oxide which comprises a) the elements Mo, Fe and B

1. A tube bundle reactor comprising at least one catalyst tube which has been charged by a process for charging a longitudinal section of a catalyst tube with a uniform fixed catalyst bed section whose active composition is at least one multielement oxide which comprises a) the elements Mo, Fe and Bi, orb) the elements Mo and V, orc) the element V and additionally P and/or Sb,on an oxidic support body, andwherein the uniform fixed catalyst bed section consists of a single type Si or of a homogenized mixture of a plurality of mutually distinguishable types Si of geometric shaped catalyst bodies or of geometric shaped catalyst bodies and geometric shaped inert bodies,where the median of the longest dimensions LSi of the geometric shaped bodies of one type Si has a value DSi, wherein, at least within one type Si of geometric shaped bodies, the proviso M thatfrom 40 to 70% of the total number of geometric shaped bodies belonging to Si has a longest dimension LSi for which 0.98·DSi≦LSi≦1.02·DSi,at least 10% of the total number of the geometric shaped bodies belonging to Si has a longest dimension LSi for which 0.94·DSi≦LSiLSi, andless than 5% of the total number of the geometric shaped bodies belonging to Si has a longest dimension LSi for which 1.10·DSiLSi, andless than 5% of the total number of the geometric shaped bodies belonging to Si has a longest dimension LSi for which 1.10·DSiLSi, andless than 5% of the total number of the geometric shaped bodies belonging to Si has a longest dimension L for which 1.10·DSiLcat,inert, andless than 5% of the total number G has a longest dimension Lcat,inert for which 1.10·DinertcatLSi, andless than 5% of the total number of the geometric shaped bodies belonging to Si has a longest dimension LSi for which 1.10·DSiLSi, andless than 5% of the total number of the geometric shaped bodies belonging to Si has a longest dimension LSi for which 1.10·DSi