A method for preparing high-purity lead acetate and nanometer lead powder using waste lead paste

A technology of waste lead paste and lead acetate, which is applied in nanotechnology, carboxylate preparation, recycling technology, etc., and can solve the problem of low purity of lead powder

Active Publication Date: 2016-08-17
湖北金洋冶金股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process ignores the impurities such as Fe and Cu in the waste lead paste. During the complexation process of organic acids, impurities such as Fe and Cu will also complex with organic acids to form insoluble complexes, which will enter the lead and organic acids together. In the solid phase of the formed complex, it exists in the lead powder after roasting, resulting in low purity of the product lead powder

Method used

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  • A method for preparing high-purity lead acetate and nanometer lead powder using waste lead paste
  • A method for preparing high-purity lead acetate and nanometer lead powder using waste lead paste
  • A method for preparing high-purity lead acetate and nanometer lead powder using waste lead paste

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Experimental program
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Effect test

Embodiment 1

[0051] like figure 1Shown, according to the preparation method of high-purity lead acetate trihydrate of the present invention, may further comprise the steps:

[0052] (1) After the waste lead-acid battery was acid-poured, it was crushed, sorted, and screened to obtain lead paste; take 100 g of waste lead paste, add 20 g of sodium carbonate, 1 g of sodium bicarbonate and 300 g of water In the compound desulfurization agent solution (waste lead paste: sodium carbonate: sodium bicarbonate: solvent water = 1:0.2:0.01:3), stir and react at room temperature for 4 hours, filter and separate, the obtained filter residue is 92g of desulfurization lead paste, and return the filtrate to The compound desulfurizer solution is reused. The sulfur content in the desulfurized lead paste was measured, and the primary conversion rate was calculated to be 95.33%.

[0053] (2) Add 9.2 g of acetic acid solution with a mass concentration of 10% to the obtained 92 g of desulfurized lead paste (th...

Embodiment 2

[0056] Compared with Example 1, its difference is that the consumption of medicament wherein has been changed, comprises the following steps:

[0057] (1) After the waste lead-acid battery is poured acid, it is crushed and sorted, and the lead paste is obtained by screening. Get waste lead plaster 100 g, add the compound desulfurizer solution (waste lead plaster: sodium carbonate: sodium bicarbonate: solvent water=1:0.5: 5:20), stirred and reacted at room temperature for 6 hours, filtered and separated, the obtained filter residue was desulfurized lead paste, and the filtrate was returned to the composite desulfurized agent solution for reuse. The sulfur content in the desulfurized lead paste was measured, and the primary conversion rate was calculated to be 99.37%.

[0058] (2) Add 482.5 g of acetic acid solution with a mass concentration of 30% to the obtained 96.5 g of desulfurized lead paste (the mass ratio of desulfurized lead paste: acetic acid solution is 1:5) and 10 g...

Embodiment 3

[0061] Compared with Example 1, its difference is that the consumption of medicament wherein has been changed, comprises the following steps:

[0062] (1) After the waste lead-acid battery is poured acid, it is crushed and sorted, and the lead paste is obtained by screening. Get waste lead plaster 100 g, add the compound desulfurizer solution (waste lead plaster: sodium carbonate: sodium bicarbonate: solvent water=1:0.4: 2:10), stirred and reacted at room temperature for 6 hours, filtered and separated, the obtained filter residue was desulfurized lead paste, and the filtrate was returned to the composite desulfurized agent solution for reuse. The conversion rate of the obtained desulfurized lead paste was analyzed, and the primary conversion rate was 99.60% through calculation.

[0063] (2) Add 290.1 ​​g of acetic acid solution with a mass concentration of 30% to 96.7 g of the obtained desulfurized lead paste (the mass ratio of desulfurized lead paste: acetic acid solution i...

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Abstract

The invention relates to a preparation method of high-purity lead acetate and nanometer lead powder, in particular to a method for preparing high-purity lead acetate and nanometer lead powder by using waste lead paste of waste lead-acid batteries. The steps are as follows: adding waste lead plaster to a solution containing a desulfurizing agent for desulfurization and then performing solid-liquid separation to obtain desulfurized lead plaster; adding acetic acid solution and a solution as a reducing agent to the obtained desulfurized lead plaster to obtain soluble lead-containing acid Add the obtained soluble lead-containing acidic solution to glacial acetic acid for recrystallization and purification to obtain high-purity lead acetate trihydrate crystals and glacial acetic acid solution. The high-purity lead acetate crystals are roasted in a tube furnace or a muffle furnace to obtain nano lead powder. The preparation of lead acetate and nano-lead powder according to the method of the present invention has simple production process and low energy consumption, and its economic performance is better than that of traditional fire method or general wet method for preparing lead powder; the recovery rate of lead is high, no sulfur dioxide pollution is generated, and energy Realize the discharge of no pollutants, and the environmental pollution is extremely low.

Description

technical field [0001] The invention relates to a preparation method of high-purity lead acetate and nano-lead powder, in particular to a method for preparing high-purity lead acetate and nano-lead powder by using waste lead paste of waste lead-acid batteries, belonging to the technical field of recycled lead production. Background technique [0002] Lead-acid batteries are the most used secondary batteries in the world, and the amount of lead consumed in the production of lead-acid batteries accounts for more than 82% of the total lead consumption. With the continuous scrapping of lead-acid batteries, the output of waste lead-acid batteries is increasing. Waste lead-acid batteries are usually composed of four major parts: waste lead paste accounts for 30%~40%, lead and lead alloy grids account for 24%~30%, waste plastic packaging and diaphragm paper and other organic matter account for 22%~30%, waste Electrolyte accounts for 11%~30%. As the main component of waste lead-ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C53/10C07C51/41B22F9/22B82Y40/00H01M10/54
CPCY02W30/84
Inventor 杨家宽孙晓娟李富元李瑞霞周峰张伟朱新锋胡雨辰梁莎
Owner 湖北金洋冶金股份有限公司
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