Abstract: A method may load granules into reaction tubes of a vertical multitube reactor installed vertically by dropping the granules from above each of the reaction tubes whereby a linear member is inserted and suspended in the reaction tube. The reaction tube has an effective length of ?1000 mm. The linear member includes a small-diameter portion positioned on an upper side and large-diameter portion continuously extending from the small-diameter portion. The small-diameter portion has an outer diameter (Ra) of ?5.0 mm, and the large-diameter portion has an outer diameter (Rb) of 5.0 to 15.0 mm larger than Ra. A length of the small-diameter portion from reaction tube's upper end is 10.0 mm or more. A distance between an upper surface of a granule loaded layer formed inside the reaction tube and a lower end of the linear member inserted in the reaction tube is ?100 mm.

Abstract: A method of loading granules into reaction tubes of a vertical multitube reactor installed in a vertical direction by dropping the granules from above each of the reaction tubes in a state that a linear member is inserted and suspended in the reaction tube. The reaction tube has an effective length of 1000 mm or more. The linear member includes a small-diameter portion positioned on an upper side and a large-diameter portion continuously extending from the small-diameter portion. The small-diameter portion has an outer diameter (Ra) of 5.0 mm or less, and the large-diameter portion has an outer diameter (Rb) of 5.0 to 15.0 mm larger than the outer diameter (Ra). A length of the small-diameter portion from an upper end of the reaction tube is 10.0 mm or more. A distance between an upper surface of a granule loaded layer formed inside the reaction tube and a lower end of the linear member inserted in the reaction tube is 100 mm or more.