Distillation yevaporosi rudzi rwakakosha rwekudonha (nzira yekuparadzanisa) yezvinhu zvine tembiricha yakadai semakemikari echisikigo. Yakambove nzira yakakurumbira yemarabhoritari yekuchenesa makemikari emakemikari, asi yave isina kujairika nekuda kwekupararira kwe vacuum distillation. Steam distillation inoramba ichikosha mune mamwe maindasitiri zvikamu. Mazhinji makemikari emakemikari anowanzo kuora pamatembiricha akakwirira. Kuparadzaniswa nekudonha pane zvakajairika (1 mhepo) nzvimbo dzekuvira haisi sarudzo, saka mvura kana chiutsi chinounzwa mumushini wekudonha. Mhepo yemvura inotakura huwandu hushoma hwemakemikari anoputika kune iyo condensation bhodhoro, uko iyo condensed liquid phase inoparadzaniswa, ichibvumira nyore kushanda. Maitiro aya anoita kuti kudonha kunyatsoita, ichideredza kuora kwezvigadzirwa zvinodikanwa. Kana zvinhu zvinoda kudonhedzwa zviri pasi pekumanikidzwa, kudonha kwemhepo kunogona kushandiswa kudzikisa zvakanyanya tembiricha
(muitiro wokuparadzanisa) nokuda kwezvinhu zvinopisa zvakadai semakemikari anonhuwirira.