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US 2021/0230755 A1Published application
Method for manufacturing sulfuric acid solution and electrolyzer used thereof
AssigneeSumitomo Metal Mining Co., Ltd.
InventorsHiroto WATANABE, Itsumi MATSUOKA, Yusuke SENBA, Hiroshi KOBAYASHI
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Abstract
A method for manufacturing a sulfuric acid solution includes supplying a chloride ion-containing sulfuric acid solution as an initial electrolyte in an electrolyzer inside of which is divided into an anode chamber and a cathode chamber by a diaphragm; and subsequently taking out a metal dissolved electrolyte in which a metal constituting the anode is dissolved from the anode chamber while supplying a current to an anode and a cathode disposed in the electrolyzer.
Claims8
1:
- A method for manufacturing a sulfuric acid solution, comprising:
- supplying a chloride ion-containing sulfuric acid solution as an initial electrolyte in an electrolyzer inside of which is divided into an anode chamber and a cathode chamber by a diaphragm;
- and
- supplying a current to an anode and a cathode disposed in the electrolyzer and subsequently taking out a metal dissolved electrolyte in which a metal constituting the anode is dissolved from the anode chamber.
1 more element
2:
- The method for manufacturing a sulfuric acid solution according to claim 1, wherein
- the metal constituting the anode contains at least any one of nickel and cobalt.
3:
- The method for manufacturing a sulfuric acid solution according to claim 1, wherein
- the chloride ion-containing sulfuric acid solution has a chloride ion concentration of 1 g/liter or more and 20 g/liter or less.
4:
- The method for manufacturing a sulfuric acid solution according to claim 1, wherein
- the cathode chamber has a liquid surface maintained to be higher than a liquid surface of the anode chamber.
5:
- The method for manufacturing a sulfuric acid solution according to claim 1, wherein
- the taking out includes supplying the anode and the cathode with a pulse current that repeats a periodic application and interruption of the current.
6:
- The method for manufacturing a sulfuric acid solution according to claim 5, wherein
- in the periodic application and interruption of the current, a proportion of a current application time in one cycle of the periodic application and interruption of the current is 0.8 or more and less than 1.0.
7:
- An electrolyzer for dissolving a metal constituting an anode by supplying a current, comprising:
- a diaphragm that divides an inside of the electrolyzer into an anode chamber and a cathode chamber, wherein
- the diaphragm includes a filter cloth having a water permeability of 0.01 liters/(m2·s) or more and 0.5 liters/(m2·s) or less.
8:
- The electrolyzer according to claim 7, further comprising:
- an outlet pipe with an opening for taking out an electrolyte inside the electrolyzer, the opening being disposed below the anode.