There are two main routes for the industrial synthesis of iso-octanoic acid. One is the oxidation method of iso-octanoic acid, which has high selectivity, reliable raw material source and simple operation. However, the process is long and not easy to scale production. Second, butyral as raw material, after condensation dehydration to produce 2-ethyl hexenal, then hydrogenation to obtain 2-ethyl hexenal, and then oxidation to isoctanoic acid, this route of raw material source is reliable, and aldehyde oxidation method for continuous, fully closed process, easy to scale production, some large companies in Europe and America use this route production, Research institute of our country, the successful development of butyral synthesis of isoctanoic acid technology, and has established the industrial equipment.