The paper deals with the new technological processes of obtaining vital microelements, so-called biometals, based on the possibility of relevant oxide conversion in gaseous atmosphere with ultra-low oxidation potential. Specic ways are shown for achieving ultra-deep rarefaction of atmosphere of oxygen (Po2≈10-26 atm). Temperature range of the current processes and the ratio of initial reagents are dened, which determine the qualitative and quantitative sides of the condensates extracted in the reactor.