| 摘要 |
PROBLEM TO BE SOLVED: To provide a simple method for producing acetic anhydride under a extremely mild condition by reacting acetic acid with oxygen in the presence of a solid catalyst. SOLUTION: Acetic acid is reacted with oxygen (molecular oxygen, such as the pure oxygen, air, a diluted product obtained by diluting them with a gas inert to the reaction) in the presence of a solid catalyst (preferably the solid catalyst containing palladium) preferably in a vapor phase at 80-300 deg.C, preferably 120-250 deg.C reaction temperature under a normal pressure to 1.0 MPa pressure, preferably the normal pressure to 0.5 MPa pressure, at 200-20,000 hr-1 gas space velocity when the reaction is carried out by a flow-through type vapor phase catalytic reaction.
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