Production of azelaic acid by the compound solvent-ozonization-catalytic oxidation process from oleic acid

The mixture of oleic acid,water,pelargonic acid and acetic acid was treated with ozone at 0～15℃ before the reaction was fully carried out.The resulting mixture was heated to 85～100℃ and passed with oxygen gas for more 2～3 hours,with using Mn(Ac)2 and CoCl2 as catalysts.Then azelaic acid and pelargonic acid were separated from the end products.The yield of azelaic acid was more than 70%,with purity over 98.4%.Microwave was also discovered to be a good catalytic method for the process.