PROCESS FOR VAPOR-PHASE CATALYTIC OXIDATION

摘要

A process for vapor-phase catalytic oxidation by feeding a gaseous raw material into a fixed-bed multi-pipe reactor comprising reaction pipes filled with catalysts, wherein two or more catalyst layers different in activity are placed in each reaction pipe in a state stratified in the reaction direction and the catalyst layer nearest to the port of feeding the gaseous raw material has a higher catalytic activity than that of the next catalyst layer adjacent thereto.