Method for recovering ruthenium from ruthenium-containing waste liquid

The invention relates to a method for recovering ruthenium from ruthenium-containing waste liquid. The method comprises the following steps that the ruthenium-containing waste liquid is concentrated to prepare a concentrated solution, wherein the weight percentage of ruthenium in the concentrated so...

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Hauptverfasser: LAN RENFENG, LIU XIANGYU
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to a method for recovering ruthenium from ruthenium-containing waste liquid. The method comprises the following steps that the ruthenium-containing waste liquid is concentrated to prepare a concentrated solution, wherein the weight percentage of ruthenium in the concentrated solution is greater than or equal to 1%; nitrite is added into the concentrated solution for primary oxidation, and a first reaction solution is prepared; and perchloric acid is added into the first reaction solution for secondary oxidation, and ruthenium tetroxide is prepared. The method can recovermetal ruthenium from the ruthenium-containing waste liquid, and is high in recovery rate, simple to operate, low in cost and high in efficiency. 本发明涉及一种从含钌废液中回收钌的方法。所述方法包括如下步骤:浓缩含钌废液,制备浓缩液;所述浓缩液中钌的重量百分比不低于1%;于所述浓缩液中加入亚硝酸盐进行初氧化,制备第一反应液;于所述第一反应液中加入高氯酸进行二级氧化,制备四氧化钌。该方法能够从含钌废液回收金属钌,回收率高,且操作简单、成本低、效率高。