| abstract |
(Meth) acrolein in production of (meth) acrolein or (meth) acrylic acid is capable of avoiding stoppage of the whole plant due to a failure in the oxidation reaction process, enabling stable continuous operation, and being excellent in economic efficiency. Alternatively, a method of (meth) acrylic acid is provided. A method for producing (meth) acrolein or (meth) acrylic acid, comprising an oxidation reaction step of gas phase catalytic oxidation of a raw material gas, a reaction gas cooling step of cooling the obtained reaction gas, and a reaction product A light-boiling separation step for separating light-boiling components from the product, a purification step for separating and removing high-boiling components from the reaction product, and a high-boiling component decomposition step for decomposing high-boiling components in the bottoms in the purification step. In a method of producing (meth) acrolein or (meth) acrylic acid by a process of sequentially arranging, an oxidation reaction step is arranged in parallel and operated simultaneously. [Selection figure] None |