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Method for extracting lead through electrolyzing recycled waste lead storage battery lead plaster by ionic liquid

A waste lead storage battery and ionic liquid technology, applied in the field of non-ferrous metal metallurgy, can solve the problems of difficult-to-scale industrial promotion and application, complex lead paste pretreatment, strong electrolyte corrosion, etc., to reduce equipment corrosion, strong activity, and green recycling. Effect

Inactive Publication Date: 2017-03-29
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have prominent problems such as complex pretreatment of lead paste, many side reactions, low current efficiency, high energy consumption, strong electrolyte corrosion and high equipment requirements, making it difficult to achieve large-scale industrial application.

Method used

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  • Method for extracting lead through electrolyzing recycled waste lead storage battery lead plaster by ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The method for extracting lead from waste lead storage battery lead plaster by electrolysis of the ionic liquid, its specific steps are as follows:

[0020] (1) Firstly, the waste lead battery lead paste powder (the lead content of the waste lead battery lead paste powder is 78.54% and the following mass percentage of impurities S: O=1.59%: 8.74% is mixed at a temperature of 30°C. The particle size of waste lead battery lead paste powder is 150 μm, and the amount of waste lead battery lead paste powder is 0.01mol / L) is dissolved in ionic liquid to obtain ionic liquid electrolyte, wherein the ionic liquid is a deep eutectic solvent (under an inert atmosphere, Mix the quaternary ammonium salt and the polyol according to the molar ratio of 1:2, and mix them evenly at a temperature of 90°C (constant temperature oil bath) to prepare a deep eutectic solvent; the quaternary ammonium salt is choline chloride, and the polyol is ethyl diol);

[0021] (2) In an inert atmosphere, ...

Embodiment 2

[0023] The method for extracting lead from waste lead storage battery lead plaster by electrolysis of the ionic liquid, its specific steps are as follows:

[0024] (1) Firstly, the lead paste powder of waste lead storage battery (the lead content of the lead paste powder of waste lead storage battery is 70.08% and the impurity S in the following mass percentages: O=1.59%: 8.74% is firstly mixed at a temperature of 85°C, The particle size of waste lead battery lead paste powder is 40 μm, and the amount of waste lead battery lead paste powder is 0.1mol / L) is dissolved in ionic liquid to obtain ionic liquid electrolyte, wherein the ionic liquid is a deep eutectic solvent (under an inert atmosphere, Mix the quaternary ammonium salt and polyol according to the molar ratio of 3:5, and mix evenly at a temperature of 70°C (constant temperature oil bath) to prepare a deep eutectic solvent; the quaternary ammonium salt is tetrabutylammonium chloride, polyol for glycerol);

[0025] (2) ...

Embodiment 3

[0027] The method for extracting lead from waste lead storage battery lead plaster by electrolysis of the ionic liquid, its specific steps are as follows:

[0028] (1) Firstly, the lead paste powder of waste lead storage battery (the lead content of the waste lead storage battery lead paste powder is 70.08% and also contains the following mass percentage of impurities S: O=1.59%: 8.74% at a temperature of 70°C, The particle size of waste lead battery lead paste powder is 75 μm, and the amount of waste lead battery lead paste powder is 0.05mol / L) is dissolved in ionic liquid to obtain ionic liquid electrolyte, wherein the ionic liquid is a deep eutectic solvent (under an inert atmosphere, Mix the quaternary ammonium salt and polyol according to the molar ratio of 1:2, and mix evenly at a temperature of 60°C (constant temperature oil bath) to prepare a deep eutectic solvent; the quaternary ammonium salt is tetramethylammonium chloride, polyol for xylitol);

[0029] (2) Under an...

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Abstract

The invention relates to a method for extracting lead through electrolyzing recycled waste lead storage battery lead plaster by ionic liquid, and belongs to the technical field of nonferrous metallurgy. The method comprises the following steps: firstly, dissolving waste lead storage battery lead plaster powder into the ionic liquid under the condition of the temperature being 30 to 85 DEG C to obtain ionic liquid electrolyte, wherein the ionic liquid is a deep eutectic solvent, [BMIM]AlCl3, [BMIM]BF4 or [BMIM]PF6; under an inert atmosphere, carrying out electrodeposition in the obtained ionic liquid electrolyte by taking a graphite electrode as an anode, and carbon steel, stainless steel, nickel or cooper as a cathode, thus obtaining lead powder on the cathode. According to the method, the ionic liquid is applied to the electrolytic reduction of the waste lead storage battery lead plaster by serving as an electrolyte; the prepared lead powder is high in purity, fine in granularity and high in activity.

Description

technical field [0001] The invention relates to a method for extracting lead from waste lead storage battery lead plaster by ionic liquid electrolysis and belongs to the technical field of nonferrous metal metallurgy. Background technique [0002] Lead-acid batteries are the batteries with the largest output and widest uses among all kinds of batteries in the world. At present, about 70% of the lead in the world's refined lead consumption is used in the production of lead-acid batteries, accompanied by a large amount of waste lead-acid batteries. In order to save the increasingly depleted mineral resources and avoid the environmental pollution caused by waste lead materials, the recycling of waste lead-acid batteries is very important both at home and abroad. Discarded lead-acid batteries are generally collected and processed in a centralized manner, and are usually composed of waste electrolyte, lead or lead alloy grids, lead paste and organic matter. Among them, the grid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C5/02
CPCC25C5/02
Inventor 汝娟坚王丁华一新
Owner KUNMING UNIV OF SCI & TECH
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