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Recovery method of waste lead-acid battery

A recycling method, waste lead-acid technology, applied in battery recycling, lead-acid batteries, waste collector recycling, etc., can solve the problems of waste lead-acid battery recycling method is not clean enough, to achieve more atomic economy, simple operation steps, The effect of broad market prospects

Active Publication Date: 2020-04-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] For the above defects or improvement needs of the prior art, the invention provides a method for recycling waste lead-acid batteries, which converts the lead element in the lead paste of the waste lead-acid battery into lead sulfate through a wet process; and then The obtained lead sulfate is desulfurized and converted into an aqueous solution of divalent lead ions; finally, the obtained aqueous solution of divalent lead ions is mixed with potassium iodide solution or sodium iodide solution under acidic conditions to prepare lead iodide, thus solving the problem of Technical problems such as insufficient cleanliness of the prior art waste lead-acid battery recycling method

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  • Recovery method of waste lead-acid battery

Examples

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Embodiment 1

[0097] Take 100g of the lead paste obtained from the waste lead-acid battery, use 1L of NaOH solution with a concentration of 2mol / L to extract it, fully stir for 1h and then filter. The filter residue obtained in the above-mentioned filtration process first takes 0.5mol / L H with a pH of 2 2 O 2 500mL of the solution was reacted (using methanesulfonic acid to adjust the pH value of the solution), and then 150mL of a sulfuric acid aqueous solution with a concentration of 2mol / L was added to the filtrate obtained after the reaction and stirred, and then filtered, washed and dried to obtain high-purity lead sulfate . The filtrate obtained by leaching the lead paste with the above NaOH solution and separating the solid-liquid is then added dropwise concentrated sulfuric acid and fully stirred to adjust the pH of the solution to about 3, filtered, washed and dried to obtain high-purity sulfuric acid. lead. After mixing the lead sulfate obtained in the above two different processes,...

Embodiment 2

[0100] Take 250g of the lead paste obtained from the waste lead-acid battery, use 3L of NaOH solution with a concentration of 2mol / L to extract it, fully stir for 1h and 20min, and then filter. The filter residue obtained in the above filtration process first takes 0.5mol / L H with a pH of 1.5 2 O 2 The solution is 1.5L for reaction (using methanesulfonic acid to adjust the pH value of the solution), and then 500mL of a sulfuric acid aqueous solution with a concentration of 2mol / L is added to the filtrate obtained after the reaction and stirred, and then filtered, washed and dried to obtain high-purity sulfuric acid lead. The filtrate obtained by leaching the lead paste with the above NaOH solution and separating the solid-liquid is then added dropwise concentrated sulfuric acid and fully stirred to adjust the pH of the solution to about 3, filtered, washed and dried to obtain high-purity sulfuric acid. lead. After mixing the lead sulfate obtained in the above two different pro...

Embodiment 3

[0103] Take 100g of lead paste obtained from waste lead-acid batteries, add 250mL of sulfuric acid with a concentration of 2mol / L and 100mL of aqueous hydrogen peroxide solution with a concentration of 1mol / L into it to make 1000ml aqueous solution, and extract under stirring 1h. After solid-liquid separation, add 2L of sodium hydroxide solution with a concentration of 0.5mol / L to the filter residue, adjust the pH to about 8 with sulfuric acid, leaching for 1h under stirring, and after filtering and separating, add 400mL of sodium hydroxide to the white precipitate 2.1mol of methanesulfonic acid was continuously stirred under the condition of operating temperature of 60℃. After the white precipitate was completely dissolved, the concentration was adjusted to obtain 1mol / L of lead methanesulfonate, and then 400mL of 2.2mol / L was added. The potassium iodide solution was stirred and then separated by filtration. The separated solid phase was washed 5 times with deionized water, an...

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Abstract

The invention belongs to the technical field of waste recovery, and particularly relates to a recovery method of a waste lead-acid battery. The recovery method comprises the following steps of, firstly, converting lead elements in lead paste of a waste lead-acid battery into lead sulfate through a wet process; then desulfurizing the obtained lead sulfate and converting the desulfurized lead sulfate into an aqueous solution of divalent lead ions; and finally, mixing and reacting the obtained aqueous solution of divalent lead ions with a potassium iodide solution under an acidic condition to prepare the lead iodide. According to the recovery method, lead iodide is prepared from a main source of secondary lead of a waste lead-acid battery through a wet process which is almost pollution-free and mild in reaction conditions, so that the problems that pollution can occur in the traditional lead iodide preparation process and lead resources of the waste lead-acid battery are recycled are solved.

Description

Technical field [0001] The invention belongs to the technical field of waste recycling, and more specifically, relates to a recycling method of waste lead-acid batteries. Background technique [0002] Lead iodide is a material with broad market prospects. Due to its high atomic number, wide band gap, good process performance and stability at room temperature, it has important applications in the field of nuclear radiation detectors; at the same time, lead iodide is also a mainstream raw material for the preparation of perovskite solar cells One, in the process of gradual industrialization of perovskite solar cells, the market demand for lead iodide will further rise. However, the existing lead iodide preparation process generally uses primary lead as a raw material, and the primary lead extraction and smelting process generally produces pollution and emits SO. 2 And other harmful gases. At the same time, from the perspective of lead resources, as lead-acid batteries still have ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B13/00H01M10/54H01M10/06C01G21/16
CPCC01G21/16C22B7/006C22B7/008C22B13/045H01M10/06H01M10/54Y02E60/10Y02W30/84Y02P10/20
Inventor 吴旭袁笃薛雅文
Owner HUAZHONG UNIV OF SCI & TECH
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