Process for charging a reactor with a fixed catalyst bed which comprises at least annular shaped catalyst bodies K
AssigneeBASF SE
InventorsAndreas Raichle, Holger Borchert, Klaus Joachim Mueller-Engel, Hagen Wilmer, Cornelia Dobner, Ulrich Cremer
Life of this patent
Estimating the term…
Abstract
A process for charging a reactor with a fixed catalyst bed which comprises at least one annular shaped support catalyst body K, in which, before the charging, fragments formed in the preparation of the shaped catalyst bodies K are removed by screening.
Claims21
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.
A process for at least partly removing fragments which have formed in the preparation of shaped catalyst bodies K whose geometric form is that of a ring with the external diameter E, the internal diameter I and the height H with the proviso that E≧H from a mixture of annular shaped catalyst bodies K 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,
- 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.
Dependencies are inferred from the claim text.