| 摘要 |
Allyl acetate is prepared by contacting propylene with molecular oxygen in the presence of a palladium salt, acetic acid, the acetate of an alkali metal, alkaline earth metal or copper, and a copper salt, either under anhydrous conditions or in the presence of a quantity of water not exceeding 20% by wt., based on total weight of acetic acid and water, and maintaining the halide ion concentration at or less than 0.20 molar, the concentration of the acetate being at least 0.20 molar, both molarities being based on total volume of acetic acid and water,if present. Preferred palladium salts are the acetate, chloride and bromide, and preferred acetates those of lithium, sodium and potassium. The copper salt provides a redox system and may be cupric chloride or acetate. It is preferred to operate in the absence of added solvents, at 50-150 DEG C. and under superatmospheric pressure. In examples, isopropenyl and n-propenyl acetates are obtained as by-products. |
