PROCESS FOR PRODUCING METHACRYLIC ACID

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing methacrylic acid in a favorable productivity over an extended period.SOLUTION: The provided method for manufacturing methacrylic acid is a method for manufacturing methacrylic acid by feeding methacrolein, isobutylene, and oxygen into a methacrylic acid manufacturing reactor furnished with a catalyst layer including a catalyst for manufacturing methacrylic acid and by oxidizing the methacrolein continuously wherein the maximal temperature of the catalyst layer is 330°C or below. It is desirable for the maximal temperature of the catalyst layer to be controlled at 330°C or below by adjusting the feeding quantity of the isobutylene.