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Sulfuric acid solution production method, and electrolysis vessel which can be used in said production method

A technology of sulfuric acid solution and manufacturing method, which is applied in the field of electrolytic cells, can solve the problems of limited production capacity and difficult stable acquisition, and achieve the effects of inhibiting movement, increasing current density, and inhibiting the formation of passivation

Active Publication Date: 2020-08-04
SUMITOMO METAL MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, the nickel powder and nickel agglomerates used in Patent Document 1 are difficult to obtain stably due to the limited production volume.

Method used

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  • Sulfuric acid solution production method, and electrolysis vessel which can be used in said production method
  • Sulfuric acid solution production method, and electrolysis vessel which can be used in said production method
  • Sulfuric acid solution production method, and electrolysis vessel which can be used in said production method

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Experimental program
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Effect test

Embodiment 1

[0110] In embodiment 1, use water permeability to be 0.1 liter / (m 2 The filter cloth of s) is used as the diaphragm 12, the electrolytic cell 10 in which the anode chamber 21 and the cathode chamber 22 are separated. In addition, in the electrolytic cell 10 , metal nickel plates are set so that the distance between the electrodes is 45 mm as the anode 13 and the cathode 14 . Each effective area is 16cm 2.

[0111] The following sulfuric acid solution was supplied to the anode chamber 21 as an initial electrolytic solution so that the height of the liquid surface in the anode chamber 21 was 120 mm. This initial electrolyte is prepared by dissolving nickel sulfate crystals in water and adjusting the acid concentration and chloride concentration with sulfuric acid and hydrochloric acid. The nickel ion concentration is 100g / liter, the free sulfuric acid concentration is 29g / liter, and the chloride ion concentration is 3g. / liter of solution. In addition, the distance from the...

Embodiment 2

[0116] The following sulfuric acid solution was supplied to the anode chamber 21 and the cathode chamber 22 as the initial electrolytic solution, and the other parameters were the same as in Example 1. The initial stage electrolytic solution of the anode chamber 21 of embodiment 2 is that nickel ion concentration is 100g / liter, free sulfuric acid concentration is 25g / liter, and chloride ion concentration is 6g by dissolving nickel sulfate in water and using sulfuric acid and hydrochloric acid to adjust. / liter of solution. In addition, the initial electrolytic solution of the cathode chamber 22 is a solution having a chloride ion concentration of 6 g / liter, which is obtained by supplying hydrochloric acid to sulfuric acid having a concentration of 192 g / liter. Table 1 shows the conditions before metal dissolution in Example 2.

[0117] Table 2 shows the results of Example 2. The nickel ion concentration of the metal-dissolving electrolyte solution taken out was 100 g / liter,...

Embodiment 3

[0119] In embodiment 3, diaphragm 12 is that water permeability is 0.3 liter / (m 2 s) filter cloth. Other parameters are the same as in Example 1. Table 1 shows the conditions before metal dissolution in Example 3.

[0120] Table 2 shows the results of Example 3. The nickel ion concentration of the metal-dissolving electrolyte solution taken out was 100 g / liter, which was sufficient for the production of a battery positive electrode. In addition, the current density is high enough to efficiently obtain a sulfuric acid solution. In addition, it was confirmed that the current efficiency was 96% when energization was performed for 21 Ah, and it was found that electrolysis was effectively performed. In addition, the nickel ion concentration of the cathode chamber 22 was measured to be 11 g / liter, and it was found that the movement of nickel ions to the cathode chamber 22 was suppressed.

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Abstract

Provided are: a sulfuric acid solution production method, whereby it becomes possible to melt a metal at a high anode current density and with high efficiency while preventing the occurrence of passivation; and an electrolysis vessel which can be used in the production method. The sulfuric acid solution production method comprises: an initial electrolytic solution feeding step of feeding, as an initial electrolytic solution, a sulfuric acid solution containing chloride ions to an electrolysis vessel (10) of which the inside is partitioned into an anode chamber (21) and a cathode chamber (22) by a partitioning membrane; and an electrolytic solution taking out step of feeding a current to an anode (13) and a cathode (14) both arranged in the electrolysis vessel (10) and taking out a metal-melted electrolytic solution, in which a metal constituting the anode (13) is melted, from the anode chamber (21). According to this configuration, it becomes possible to prevent the migration of the metal melted on the anode (13) side to the cathode (14) side, and it also becomes possible to prevent the formation of a passive product on the anode (13) side. Therefore, a high-quality sulfuric acid solution having the metal dissolved therein can be produced with high efficiency.

Description

technical field [0001] The invention relates to a method for manufacturing sulfuric acid solution and an electrolytic cell used in the method. More specifically, it relates to a method for producing a metal ion-containing sulfuric acid solution in which metals such as nickel or cobalt are dissolved in sulfuric acid, and an electrolytic cell used in the production method. Background technique [0002] Metals such as nickel and cobalt are noble metals used as materials for plating or alloying, but in recent years, they have been increasingly used as positive electrode materials for secondary batteries such as nickel-metal hydride batteries and lithium-ion batteries for purposes other than plating or alloying. electrode material. At this time, metals such as nickel and cobalt are often used as a solution in which these metals are dissolved, for example, a sulfuric acid solution containing nickel ions in which nickel is dissolved. [0003] As an example, when nickel is used as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/00C01G51/10C01G53/10C25B9/00C25B13/02H01M4/525
CPCC01G51/10C01G53/10C25B1/01C25B9/19C25B1/22C25B15/08C25B15/02C25B13/02C25B1/50C01P2006/40C25B9/00H01M4/525H01M2004/028C25F3/02C25C1/08
Inventor 渡边宽人松冈逸见仙波祐辅小林宙
Owner SUMITOMO METAL MINING CO LTD
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