Fixed bed multi tubular reactor and method for producing unsaturated aldehyde and / or unsaturated carboxylic acid using fixed bed multi tubular reactor

摘要

PROBLEM TO BE SOLVED: To provide a fixed bed multitubular reactor that is designed so that the reaction tube equipped with a temperature measurement apparatus for measuring the temperature of catalyst layer, especially the temperature of hot spot, represents the temperature of the catalyst layer of the whole reaction tubes in a fixed bed multitubular reactor packed with a catalyst.;SOLUTION: In the fixed bed multitubular reactor in which each reaction tube has the same tube diameter and at least one reaction tube is equipped with a temperature measurement apparatus, the fixed bed multitubular reactor includes at least one reaction zone packed with a plurality of kinds of catalysts to form layers in each reaction tube, in each catalyst layer except a catalyst layer arranged closest to a reaction gas outlet side relative to at least a gas flow direction of the reaction zone, the reaction tube equipped with the temperature measurement apparatus and the reaction tube not equipped with a temperature measurement apparatus are equipped with substantially the same mass of the catalyst of the same kind and pressure loss of each reaction tube is designed to be substantially the same.;COPYRIGHT: (C)2012,JPO&INPIT