| 摘要 |
<p>The present invention aims at separating and removing arsenic, which is an impurity, in a stable form from a raw material containing rhenium and arsenic, and reducing a circulation amount of arsenic in a rhenium purification process thereby to obtain rhenium with a low-content arsenic. The present invention provides a method for separating rhenium from arsenic in a rhenium purification process, the rhenium purification process being such that a raw material containing rhenium and arsenic is oxidized and leached, and separated into a leachate containing perrhenic acid, arsenic acid, and arsenous acid and a leaching residue containing arsenate, followed by purification of rhenium from said leachate, wherein an alkali is added to the leachate to obtain an arsenic-containing precipitate and a rhenium-containing solution, rhenium is separated from the obtained rhenium-containing solution, an alkali is added to either or both the obtained arsenic-containing precipitate and the leaching residue containing arsenate thereby to obtain an arsenic-containing solution and a hydroxide precipitate, and arsenic in the obtained arsenic-containing solution is fixed as a precipitate.</p> |
