Some Technological Measures to Extract and Purify Rhenium from Heat-Resistant Materials
Two versions of hydrometallurgic extraction of rhenium from complicated solutions obtained from processing the wastes of the multicomponent heat-resistant alloy of ZhS-32 grade are presented. As a result of the application of both schemes, NH<sub>4</sub>ReO<sub>4</sub> of АР-0 grade is formed. The yield of the metal is 99.2 % of its initial content in the alloy. The used operations allow one to separate rhenium from admixture metals in one stage and exclude the channels of its irretrievable loss.