Oxidation of petroleum-based byproduct dicyclopentadiene derived diformyltricyclodecanes(DFTD)to dicarboxyltriclodecanesacids(DCTDA)was conducted under catalyst-free and ultra-low temperature conditions with O2 as oxidant.In the perspective of industry process,oxygen pressure and contents,solvent and raw mate-rial initial concentrations were screened to evaluate their influence on DCTDA generation.Results indicate that DFTD oxidation can occur rather easily under no-catalyst and ultra-low temperature conditions with O2 as oxi-dant.Oxygen content and pressure had positive effect on DCTDA production,γ-valerolactone(GVL)behaved best on DFTD generation in dynamics,while methanol could be used as a protective solvent to preserve DFTD.Besides,the existence of water in solvent was not beneficial to DCTDA production because of poor DFTD compat-ibility with water.The mechanisms of O2 and solvent influence on DCTDA generation were discussed.Meanwhile,the oxidation route of DFTD-Intermediate-DCTDA was proposed.The present work exhibits the valued potential of DFTD,which will have a positive effect on high added value of petroleum based by-products.