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Method for producing perrhenic acid aqueous solution and method for producing potassium perrhenate, ammonium perrhenate and rhenium metal using the same
Method for producing perrhenic acid aqueous solution and method for producing potassium perrhenate, ammonium perrhenate and rhenium metal using the same
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机译:高per酸水溶液的制造方法以及使用它们的高per酸钾,高r酸铵和metal金属的制造方法
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摘要
PROBLEM TO BE SOLVED: To provide a method capable of producing high-purity perrhenic acid from rhenium sulfide obtained by treating an acidic solution containing rhenium using a dry process.SOLUTION: There is provided a method for producing a perrhenic acid aqueous solution which comprises: a step of passing an acidic solution containing rhenium through an anion exchange resin to adsorb rhenium on the anion exchange resin; a step of passing an eluent through the anion exchange resin on which rhenium is adsorbed to elute rhenium from the anion exchange resin; a step of sulfurizing the rhenium contained in a solution after elution to obtain rhenium sulfide; a step of subjecting rhenium sulfide to first burning in the presence of an oxygen-containing gas to collect the gasified rhenium oxide; a step of cooling and solidifying rhenium oxide while maintaining a sulfur oxide accompanying the gasified rhenium oxide in a gas state and followed by solid-gas separation to improve the purity of the rhenium oxide; and a step of obtaining the perrhenic acid aqueous solution by dissolving the solidified rhenium oxide in water, or heating and gasifying the solidified rhenium oxide and followed by dissolving in water.
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