Olu luhlobo lwe-distillation kwindawo ephezulu ye-vacuum, yomahluko wezinto eziphathekayo zemolekyuli yokuhamba kwindlela ekhululekile, yenziwa kwizinto ezithintekayo zobushushu okanye indawo ephezulu yokubilisa izinto kunye nenkqubo yokucoca. petrochemical, iziqholo, iplastiki, ioyile kunye namanye amasimi.