Study oil distiIlation model trom peel of orange and grapetruit in the Thai Nguyen University of Agriculture and Forestry obtained the following results: to distillate 10kg peel were obtained essential oil volume averaged 249.7 ml and 220.0 ml in the peel of orange and grapetruit, respectively. The quality essential oil after distillation is good, does not contain toxic substances, a major component in the essential oils is limonene chemical. Initial study, limonene chemical is capable of treating the styrofoam.