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

A technology of electrode active material and lead-acid battery, which is applied in the direction of lead monoxide, lead oxide, battery recycling, etc., can solve the problems of expensive citric acid and sodium citrate, technical and economical existence, etc., achieve low production cost and reduce pollution High risk and high economic benefits

Active Publication Date: 2014-02-05
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 the air

[0035] The anode powder obtained from waste lead-acid batteries is treated with a sodium hydroxide solution containing a small amount of sodium chloride at a concentration of 0.5~3.0mol / L at ~100°C to make the anode powder PbSO 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 1~4 hours to obtain the required PbO powder.

Embodiment 2

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

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

[0039] After desulfurization, the negative electrode powder is placed in a crucible, and then heated in an electric furnace at 200°C~500°C for 1~4 hours to obtain the required PbO powder.

Embodiment 3

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

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

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

[0043] 2. Treatment 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 circulating production of lead-acid batteries, in particular to a method for preparing corresponding ultrafine lead monoxide powders for lead-acid battery electrodes with high electrochemical activity from waste lead-acid battery positive and negative electrode active materials. Background technique [0002] Lead-acid battery is a kind of rechargeable battery. It is cheap, easy to maintain, and can meet the needs of many users. It is 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 the human body, as well as some highly corrosive sulfuric acid. After the service life is reached, if it cannot be handled well, it will cause serious environmental pollution. [0003] In order to reduce the energy and material consumption required in the recycling process of lead-ac...

Claims

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Application Information

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Patent Type & Authority Patents(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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