Patent ID: 11975318

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.