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Method for preparing superfine lead oxide by using electrode active materials of wasted lead acid batteries

An electrode active material, lead-acid battery technology, applied in the direction of lead monoxide, lead oxide, battery recycling, etc., can solve the problems of technical economy, expensive citric acid and sodium citrate, etc., to reduce pollution risks and production costs. Low and economical effect

Active Publication Date: 2012-10-24
JIANGSU HUAFU STORAGE NEW TECH DEV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

One of the main problems of the above citric acid process is that hydrogen peroxide needs to be added as a reducing agent when dealing with lead dioxide, and the citric acid and sodium citrate used are relatively expensive.
So there is a problem with techno-economics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Desulfurization with sodium hydroxide, then burning in air

[0035]Treat the negative electrode powder obtained from waste lead-acid batteries in a sodium hydroxide solution containing a small amount of sodium chloride with a concentration of 0.5~3.0mol / L at ~100°C to make the PbSO in the negative electrode powder 4 All converted into fine Pb(OH) 2 .

[0036] Take the desulfurized negative electrode powder and place it in a crucible, and then heat it in an electric furnace at 200°C~500°C for 1~4h to obtain the required PbO micropowder.

Embodiment 2

[0037] Example 2: Desulfurization with ammonium carbonate, then burning in air

[0038] Treat the negative electrode powder obtained from waste lead-acid batteries in an ammonium carbonate solution containing polyvinylpyrrolidone with a concentration of 0.5~3.0mol / L at ~50°C to make the PbSO in the negative electrode powder 4 All converted into fine PbCO 3 .

[0039] Take the desulfurized negative electrode powder and place it in a crucible, and then heat it in an electric furnace at 200°C~500°C for 1~4h to obtain the required PbO micropowder.

Embodiment 3

[0040] Example 3: Desulfurization with ammonium carbonate, then dissolved in hydrochloric acid, and then precipitated with sodium hydroxide

[0041] Treat the negative electrode powder obtained from waste lead-acid batteries in an ammonium carbonate solution with a concentration of 0.5~3.0mol / L at ~50°C to make the PbSO in the negative electrode powder 4 All converted PbCO 3 . Wash to remove all sulfates.

[0042] In a hydrothermal reactor the obtained PbCO 3 Dissolve in hydrochloric acid at around 80°C, then add ammonia to the solution. Raise the temperature of the solution in the reactor to 180°C and keep it warm for 0.5 to 4 hours to obtain the required PbO micropowder.

[0043] 2. Processing method of positive electrode powder

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PUM

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Abstract

The invention discloses a method for preparing superfine lead oxide by using electrode active materials of wasted lead acid batteries. According to the invention, the superfine powder disclosed herein can be directly used for producing new lead acid batteries by the prior art, lead acid batteries can be recycled, and the method is a production technology which accords with circular economy principles. The method can eliminate the pollution generated by the waste lead acid batteries at the source, has the characteristics of low production cost and high economic benefit, and is suitable for existing lead acid battery production enterprises to let practical and affordable lead acid batteries be used with persistence and reassurance.

Description

technical field [0001] The invention relates to the technical field of cycle production of lead-acid batteries, in particular to a method for preparing corresponding ultrafine lead monoxide powder for lead-acid battery electrodes with high electrochemical activity by using waste lead-acid battery positive and negative active materials. Background technique [0002] Lead-acid battery is a rechargeable battery, which is cheap, easy to maintain, and can meet the needs of various users. It has been widely used in uninterruptible power supplies, battery cars, car starting power supplies, and electric bicycles. Lead-acid batteries contain a large amount of lead that is harmful to the environment and human body, and also contain some highly corrosive sulfuric acid. After the service life is reached, if it is not properly disposed of, it will cause serious environmental pollution. [0003] In order to reduce the energy and material consumption required for the recycling process of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00H01M10/54C01G21/06
CPCY02E60/12Y02P10/20Y02W30/84
Inventor 雷立旭高鹏然戴源
Owner JIANGSU HUAFU STORAGE NEW TECH DEV
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