| 摘要 |
PURPOSE: An ammonum rhenate manufacturing method is provided to collect rhenium in an ammonium rhenate form which is used as a rhenium source from gas generated from the concentrate calcination of a rhenium containing aqueous solution and/or waste molydenite. CONSTITUTION: An ammonium rhenate production system(10) comprises a wet scrubbing unit(400), a sulfate ion removing unit(500), a solvent extraction unit(100), a precipitation unit(200), and a residual liquid treatment unit(300). The solvent extraction unit collects rhenium ions in a rhenium containing aqueous solution with an organic solvent, and reverse-extracts the rhenium ions into ammonia by treating the organic solvent with the ammonia. The precipitation unit precipitates the rhenium ions in an ammonium rhenate form from the rhenium ion containing ammonia. The residual liquid treatment unit evaporate-crystallizes the residual solution after separating the precipitated ammonium rhenate into solid and liquid, and precipitates the rhenium ions in the ammonium rhenate form by re-dissolving the obtained crystal in ammonia. [Reference numerals] (100) Solvent extraction unit; (200) Precipitation unit; (300) Residual liquid treatment unit; (400) Wet scrubbing unit; (500) Sulfate ion removing unit; (AA) Gas; (BB) Rhenium containing aqueous solution; (CC) Organic solvent; (DD) Ammonia water |
