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A kind of recovery method of waste lead-acid battery

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

Active Publication Date: 2020-12-08
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

Method used

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  • A kind of recovery method of waste lead-acid battery
  • A kind of recovery method of waste lead-acid battery
  • A kind of recovery method of waste lead-acid battery

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Embodiment 1

[0097] Take 100g of the lead paste obtained from the spent lead-acid battery, use 1L of NaOH solution with a concentration of 2mol / L to leach it, stir it thoroughly for 1h, and then filter it. The filter residue that obtains in the above-mentioned filtration process first takes the H that pH is 2 0.5mol / L 2 o 2 Solution 500mL is reacted (using methanesulfonic acid to adjust the pH value of the solution), then to the filtrate obtained by filtering after the reaction, add 150mL of sulfuric acid aqueous solution with a concentration of 2mol / L and stir, filter, wash and dry again to obtain high-purity lead sulfate . And the filtrate obtained after the above-mentioned NaOH solution leaching lead plaster and solid-liquid separation is added dropwise concentrated sulfuric acid and fully stirred to adjust the pH value of the solution to about 3, and then filtered, washed and dried to obtain high-purity sulfuric acid. lead. After the lead sulfate obtained in the above two different ...

Embodiment 2

[0100] Take 250g of the lead paste obtained from the spent lead-acid battery, use 3L of NaOH solution with a concentration of 2mol / L to leach it, stir it thoroughly for 1h and 20min, and then filter it. The filter residue that obtains in the above-mentioned filtering process first takes the H of 0.5mol / L that pH is 1.5 2 o 2 Solution 1.5L is reacted (using methanesulfonic acid to adjust the pH value of the solution), and then to the filtrate obtained by filtering after the reaction, add 500mL of sulfuric acid aqueous solution with a concentration of 2mol / L and stir, and then filter, wash and dry to obtain high-purity sulfuric acid lead. And the filtrate obtained after the above-mentioned NaOH solution leaching lead plaster and solid-liquid separation is added dropwise concentrated sulfuric acid and fully stirred to adjust the pH value of the solution to about 3, and then filtered, washed and dried to obtain high-purity sulfuric acid. lead. After the lead sulfate obtained in...

Embodiment 3

[0103]Take 100g of lead paste obtained from spent 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 to it, and dilute it to 1000ml of aqueous solution, and leaching it under stirring conditions. 1h. After solid-liquid separation, add 2L 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 1 hour under stirring conditions, filter and separate, and add 400mL of sodium hydroxide solution with a concentration of 0.5mol / L to the white precipitate. 2.1mol of methanesulfonic acid was stirred continuously under the condition of operating temperature of 60°C. After the white precipitate was completely dissolved, the concentration was adjusted to obtain 1mol / L lead methanesulfonate, and then 400mL of lead methanesulfonate with a concentration of 2.2mol / L was added. Potassium iodide solution was ...

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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 method for recycling waste lead-acid batteries. Background technique [0002] Lead iodide is a material with broad market prospects. Due to its high atomic number, large 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 perovskite solar cells gradually moving towards industrialization, the market demand for lead iodide will further increase. However, the existing lead iodide preparation process generally uses primary lead as a raw material, and the process of primary lead extraction and smelting from ore generally produces pollution and emits SO 2 and other harmful gases. At the same time, from the perspective of lead resource...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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