| 摘要 |
PROBLEM TO BE SOLVED: To provide a process for heterogeneously catalyzed partial gas phase oxidation of propylene to form acrylic acid in the presence of propane as an inert diluent gas.SOLUTION: A starting reaction gas mixture comprising propylene, molecular oxygen, and inert diluent gas propane with a molar O2:C3H6 ratio of 1 or greater is conducted through at least one first catalyst bed whose catalysts have at least one multimetal oxide comprising Mo, Fe and Bi, and a product gas mixture is made with the byproduct cyclopropane content of 3 mol% or less based on the molar amount of propane contained in the starting reaction gas mixture 1, to proceed to a further reaction. |
