METHOD FOR PRODUCING UNSATURATED ALDEHYDES AND UNSATURATED ACIDS IN FIXED-BED CATALYTIC PARTIAL OXIDATION REACTOR WITH ENHANCED HEAT CONTROL SYSTEM

摘要

PURPOSE: A method for producing unsaturated aldehydes and unsaturated acids in a fixed-bed catalytic partial oxidation reactor is provided to secure the thermal stability of the catalyst and increase the yields of intermediate and final products by employing the enhanced heat control system. CONSTITUTION: The unsaturated aldehydes and unsaturated acids are produced from olefins by the method comprising fixed-bed catalytic partial oxidation in a shell-and-tube heat exchanger-type reactor. In the method, the reactor comprises a first step reaction zone(11,12) of mainly producing the unsaturated aldehydes and a second step reaction zone(21) of mainly producing the unsaturated acids, wherein the first-step reaction zone is divided into two or more zones by a partition(13), each of the divided shell spaces being filled with a heat transfer medium to maintain a temperature to isothermal state or within a difference of 0-5deg.C, in which the temperatures of the heat transfer media in each of the divided shell spaces are set to increase in the moving direction of reactants, and when the divided shell spaces are named along an axial direction, Th1-Tsalt1 <= 150deg.C and ThN-TsaltN <= 120deg.C.