REDUCTION OF PROPIONIC ACID IN ACRYLIC ACID MIXTURE GAS

摘要

PROBLEM TO BE SOLVED: To provide a method for selectively reducing propionic acid in an acrylic acid mixture gas obtained by the gaseous phase oxidation of propylene and/or propane. SOLUTION: This method for reducing propionic acid in an acrylic acid mixture gas obtained by oxidizing propylene and/or propane as raw material gases in a gaseous phase comprises thermally treating the acrylic acid mixture gas in the presence of a composite oxide containing molybdenum and at least one of iron, cobalt and nickel.