Vacuum distillation separates it from the other components in crude oil (such as naphtha, gasoline and diesel).
vˈækjuːm dɪstɪlˈeɪʃən sˈɛpɚɹˌeɪts ɪt fɹʌmðɪ ˈʌðɚ kəmpˈoʊnənts ɪn kɹˈuːd ˈɔɪl sˈʌtʃ ɐz nˈæfθə, ɡˈæsəlˌiːn ænd dˈiːzəl.