Lolu uhlobo lwe-distillation endaweni ye-vacuum ephezulu, ngenxa yomehluko wezinto ezibonakalayo zamangqamuzana ukunyakaza kwendlela yamahhala, wenziwa endaweni ezwela ukushisa noma iphuzu eliphezulu lokubilisa kanye nenqubo yokuhlanza. petrochemical, izinongo, ipulasitiki, uwoyela kanye neminye imikhakha.