Process for introducing a portion withdrawn from at least one production charge of annular coated catalysts K into a reaction tube of a tube bundle reactor
AssigneeBASF SE
InventorsUlrich Cremer, Hagen Wilmer, Andreas Raichle, Hermann Petersen, Holger Borchert, Horst Strahberger, Klaus Joachim Mueller-Engel
Life of this patent
Estimating the term…
Abstract
A process for introducing annular coated catalysts K into a reaction tube of a tube bundle reactor, in which adhering pairs of annular coated catalysts K formed in the preparation of the annular coated catalysts K, before the introduction thereof into the reaction tube, are removed at least partly from the annular coated catalysts K.
Claims32
A process for introducing a portion withdrawn from at least one production charge of annular coated catalysts K into a reaction tube of a tube bundle reactor for the purpose of charging this reaction tube with a fixed catalyst bed suitable for performing a heterogeneously catalyzed partial gas phase oxidation of an organic starting compound, which comprises, before the withdrawal of the portion from the at least one production charge and/or after the withdrawal but before the introduction of the portion withdrawn into the reaction tube, removing fused adhering pairs of annular coated catalysts K formed in the preparation of the at least one production charge of annular coated catalysts K at least partly from the at least one production charge and/or from the portion withdrawn.
A process for introducing a portion withdrawn from at least one production charge of annular coated catalysts K into a reaction tube of a tube bundle reactor for the purpose of charging this reaction tube with a fixed catalyst bed suitable for performing a heterogeneously catalyzed partial gas phase oxidation of an organic starting compound, which comprises, before the withdrawal of the portion from the at least one production charge and/or after the withdrawal but before the introduction of the portion withdrawn into the reaction tube, removing adhering pairs of annular coated catalysts K formed in the preparation of the at least one production charge of annular coated catalysts K at least partly from the at least one production charge and/or from the portion withdrawn,
- wherein the adhering pairs are removed by a process for screening with the aid of a screen, and
- wherein, between the external diameter E and the height H of the annular coated catalyst K, the relationship H≦0.5·E is satisfied and the screen has screen orifices O1 within whose continuous outline a rectangle R with the side lengths L and C can be inscribed with the proviso M1,
- L>E≧2H>C>H,
- but not with the proviso M1*,
- L>C≧2H.
A process for introducing a portion withdrawn from at least one production charge of annular coated catalysts K into a reaction tube of a tube bundle reactor for the purpose of charging this reaction tube with a fixed catalyst bed suitable for performing a heterogeneously catalyzed partial gas phase oxidation of an organic starting compound, which comprises, before the withdrawal of the portion from the at least one production charge and/or after the withdrawal but before the introduction of the portion withdrawn into the reaction tube, removing adhering pairs of annular coated catalysts K formed in the preparation of the at least one production charge of annular coated catalysts K at least partly from the at least one production charge and/or from the portion withdrawn, wherein the adhering pairs are removed by a process for screening with the aid of a screen, and
- wherein, between the external diameter E and the height H of the annular coated catalyst K, the relationship E≧H>0.5·E is satisfied and the screen has screen orifices O3 within whose continuous outline a rectangle R with the side lengths L and C can be inscribed with the proviso M3,
- L>E<2H>C>H,
- but not with the proviso M3*,
- L≧C≧2H.
A process for preparing annular coated catalysts by applying a catalytic active composition to annular shaped support bodies with the aid of a liquid binder, which comprises, after the preparation process has ended, at least partly removing fused adhering pairs of coated catalyst rings formed in the preparation.
A process for preparing annular coated catalysts by applying a catalytic active composition to annular shaped support bodies with the aid of a liquid binder, which comprises, after the preparation process has ended, at least partly removing adhering pairs of coated catalyst rings formed in the preparation, wherein the adhering pairs are removed by a process for screening with the aid of a screen, and wherein, between the external diameter E and the height H of the annular coated catalyst, the relationship H≦0.5·E is satisfied and the screen has screen orifices O1 within whose continuous outline a rectangle R with the side lengths L and C can be inscribed with the proviso M1,
- L>E≧2H>C>H,
- but not with the proviso M1*,
- L>C≧2H.
A process for preparing annular coated catalysts by applying a catalytic active composition to annular shaped support bodies with the aid of a liquid binder, which comprises, after the preparation process has ended, at least partly removing adhering pairs of coated catalyst rings formed in the preparation, wherein the adhering pairs are removed by a process for screening with the aid of a screen, and wherein, between the external diameter E and the height H of the annular coated catalyst K, the relationship E≧H>0.5·E is satisfied and the screen has screen orifices O3 within whose continuous outline a rectangle R with the side lengths L and C can be inscribed with the proviso M3,
- L>E<2H>C>H,
- but not with the proviso M3*,
- L≧C≧2H.
Dependencies are inferred from the claim text.