Patent ID: 8517180

Claim:
A process for charging a reactor with a fixed catalyst bed which comprises at least one shaped catalyst body K whose geometric shape is that of a ring with the external diameter E, the internal diameter I and the height H where E≧H, which process comprises: contacting a screen with shaped catalyst bodies K and fragments thereof, wherein at least part of said fragments pass through the screen, thereby leaving a screen residue on the screen comprising the shaped catalyst bodies K, and charging the fixed catalyst bed with the screen residue, wherein the screen has screen orifices whose continuous outline has in each case at least two straight-line sections which are opposite one another at a distance C over at least one length L like two parallel sides of a rectangle with the side lengths L and C, with the proviso that each line which runs through an outline point P lying on the outline of a screen orifice and parallel to the theoretical rectangle side with the side length C does not have any further point lying on the outline whose distance from the outline point P is larger than the side length C, wherein, in the process for screening, the relations I, L>E≧H>C ≧( E−I )/2 (I), are satisfied.