A method of charging a vertical tube having an internal diameter of 50 mm or less with catalyst particles, which comprises introducing a filling aid into the vertical tube, where the filling aid comprises a flexible elongated body and the ratio of the cross section of the flexible elongated body to
A method of charging a vertical tube having an internal diameter of 50 mm or less with catalyst particles, which comprises introducing a filling aid into the vertical tube, where the filling aid comprises a flexible elongated body and the ratio of the cross section of the flexible elongated body to the cross section of the tube is from 0.003 to 0.08, and introducing the catalyst particles into the tube.
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We claim: 1. A method of charging a vertical tube having an internal diameter of 50 mm or less with catalyst particles, the method comprising: introducing a filling aid into the vertical tube, where the filling aid comprises a flexible elongated body and a ratio of the cross section of the flexible
We claim: 1. A method of charging a vertical tube having an internal diameter of 50 mm or less with catalyst particles, the method comprising: introducing a filling aid into the vertical tube, where the filling aid comprises a flexible elongated body and a ratio of the cross section of the flexible elongated body to the cross section of the tube is from 0.003 to 0.08, and (1) the filling aid has no elements which extend radially outward from the flexible body, or (2) the filling aid comprises spacers which are arranged at a distance from one another and extend perpendicular to the longitudinal direction of the filling aid, wherein the projection of the spacers onto a plane perpendicular to the longitudinal direction of the filling aid has no larger area than a cross section of the flexible body, and the filling aid has no other elements than said spacers, which extend radially outward from the flexible body; introducing the catalyst particles into the tube, and withdrawing the filling aid during introduction of the catalyst particles so that the lower end of the filling aid is always above the fill height of the catalyst particles in the tube, thereby obtaining a charged vertical tube having a bulk density of the packed catalyst particles and a pressure drop lower than the bulk density and the pressure drop of the vertical tube in which the catalyst particles are introduced without the filling aid for charging the vertical tube having the internal diameter of 50 mm or less with the catalyst particles. 2. The method according to claim 1, wherein the flexible elongated body has an essentially circular cross section. 3. The method according to claim 2, wherein the ratio of the cross section of the flexible elongated body to the cross section of the tube is from 0.005 to 0.07. 4. The method of claim 3, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 5. The method of claim 3, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 6. The method of claim 2, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 7. The method of claim 2, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 8. The method of claim 1, wherein the flexible elongated body comprises a textile string or a textile tape. 9. The method of claim 8, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 10. The method of claim 8, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 11. The method of claim 1, wherein the filling aid comprises spacers which are arranged at the distance from one another and extend perpendicular to the longitudinal direction of the filling aid, wherein the projection of the spacers onto the plane perpendicular to the longitudinal direction of the filling aid has no larger area than the cross section of the flexible body, and the filling aid has no other elements than said spacers, which extend radially outward from the flexible body. 12. The method of claim 11, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 13. The method of claim 11, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 14. The method of claim 1, which comprises successively: introducing the filling aid into the tube in such a way that the lower end of the filling aid is located at a first height, introducing catalyst particles into the tube to below the first height, optionally, partly withdrawing the filling aid from the tube so that the lower end of the filling aid is located at a second or further height and introducing catalyst particles into the tube to below the second or further height, and withdrawing the filling aid completely from the tube and filling the tube with catalyst particles up to the final fill height. 15. The method of claim 14, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 16. The method of claim 1, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 17. The method of claim 1, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 18. The method of claim 1, wherein the filling aid has no elements which extend radially outward from the flexible body. 19. The method of claim 1, wherein the maximum diameter of the catalyst particles is from 3 to 8 mm. 20. A method of charging a vertical tube having an internal diameter of 50 mm or less with catalyst particles, the method comprising: introducing a filling aid into the vertical tube, where the filling aid comprises a flexible elongated body and a ratio of the cross section of the flexible elongated body to the cross section of the tube is from 0.003 to 0.08, introducing the catalyst particles into the tube, and withdrawing the filling aid during introduction of the catalyst particles so that the lower end of the filling aid is always above the fill height of the catalyst particles in the tube, wherein the filling aid comprises a rigid terminating element whose density is greater than that of the flexible body, and (1) the filling aid does not comprise other elements which extend radially outward from the flexible body, or (2) the filling aid comprises spacers which are arranged at a distance from one another and extend perpendicular to the longitudinal direction of the filling aid, wherein the projection of the spacers onto a plane perpendicular to the longitudinal direction of the filling aid has no larger area than a cross section of the flexible body, and the filling aid has no other elements than said spacers and the rigid terminating element, which extend radially outward from the flexible body, thereby obtaining a charged vertical tube having a bulk density of the packed catalyst particles and a pressure drop lower than the bulk density and the pressure drop of the vertical tube in which the catalyst particles are introduced without the filling aid for charging the vertical tube having the internal diameter of 50 mm or less with the catalyst particles. 21. The method of claim 20, wherein the catalyst particles comprise shaped bodies which comprise a catalytically active composition. 22. The method of claim 20, wherein the catalyst particles comprise a catalytic composition applied in the form of a shell to an inert support. 23. The method of claim 20, wherein the filling aid does not comprise other elements which extend radially outward from the flexible body. 24. The method of claim 20, wherein the filling aid comprises spacers which are arranged at the distance from one another and extend perpendicular to the longitudinal direction of the filling aid, wherein the projection of the spacers onto the plane perpendicular to the longitudinal direction of the filling aid has no larger area than the cross section of the flexible body, and the filling aid has no other elements than said spacers and the rigid terminating element, which extend radially outward from the flexible body. 25. The method of claim 20, wherein the maximum diameter of the catalyst particles is from 3 to 8 mm.
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이 특허에 인용된 특허 (3)
Boe, Michael; Erikstrup, Niels, Catalyst loading method and apparatus.
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