Method of vapor phase catalytic oxidation using multitubular reactor

摘要

An object of the present invention is to provide a method of vapor phase catalytic oxidation which is capable of: efficiently removing heat of reaction; preventing the formation of hot spots; and efficiently providing a desired product. Provided is a method of vapor phase catalytic oxidation of a substance to be oxidized with a gas containing molecular oxygen by means of a multitubular reactor, the multitubular reactor comprising: a cylindrical reactor shell fitted with a raw material supply port and a product outlet; multiple circular conduits disposed around the cylindrical reactor shell and used to introduce a heat medium into the cylindrical reactor shell or to lead the heat medium out therefrom; a circulation device for connecting the multiple circular conduits to each other; multiple reaction tubes restrained by means of multiple tube plates of the reactor and having a catalyst accommodated therein; and multiple baffles arranged in a longitudinal direction of the reaction tube and used to change a direction of the heat medium introduced into the reactor shell, wherein the method comprises: performing a reaction of vapor phase catalytic oxidation under such conditions that a heat transfer coefficient of the heat medium is 1,000 W/(m².K) or higher.