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Method for preparing basic lead sulfate and basic lead sulfate electrode from lead sulfate and lead oxide

A lead sulfate and lead oxide technology, applied in lead sulfate, lead-acid battery electrodes, battery electrodes, etc., can solve problems such as difficulties and shattering, and achieve the effect of reducing production costs

Inactive Publication Date: 2019-11-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A disadvantage of this method is that it is necessary to separate the positive and negative electrodes of the waste lead-acid battery, which has certain difficulties in actual operation, especially when the battery's polar plates are already in dilapidated condition, it is almost impossible

Method used

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  • Method for preparing basic lead sulfate and basic lead sulfate electrode from lead sulfate and lead oxide
  • Method for preparing basic lead sulfate and basic lead sulfate electrode from lead sulfate and lead oxide
  • Method for preparing basic lead sulfate and basic lead sulfate electrode from lead sulfate and lead oxide

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Embodiment 1

[0059] The synthesis of embodiment 1 basic lead sulfate

[0060] Disperse PbO and lead sulfate in water according to the molar ratio shown in Table 1, and stir and react at the specified temperature for 1 to 6 hours to obtain the corresponding basic lead sulfate:

[0061] The synthetic reaction conditions of table 1 basic lead sulfate

[0062]

Embodiment 2

[0063] Embodiment 2 manufactures lead sulfate with the lead compound of waste lead-acid battery

[0064] (1) crushing waste lead-acid batteries, and then sorting to obtain lead compounds, lead alloys, plastics and sulfuric acid;

[0065] (2) the lead compound is desulfurized with ammonium carbonate, then reduced with a reducing agent, and the product obtained is reacted with substances such as nitric acid and acetic acid to obtain a soluble lead salt solution;

[0066] (3) soluble lead salt solution reacts with the sulfuric acid that step 1 obtains to obtain lead sulfate.

[0067] Described reductant (comprising its oxidation product) can be any not with Pb 2+ It forms substances that are insoluble in acid substances such as nitric acid and acetic acid. For example, methanol, nitrite, etc.

Embodiment 3

[0068] Embodiment 3 manufactures PbO with lead sulfate

[0069] (1) lead sulfate and ammonium carbonate are reacted in aqueous solution, obtain lead carbonate and ammonium sulfate solution;

[0070] (2) Heating lead carbonate at 350-650°C under air isolation to obtain PbO;

[0071] (3) Evaporate and concentrate the ammonium sulfate solution, and then crystallize to obtain ammonium sulfate that can be used as a chemical fertilizer.

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Abstract

The invention provides a method for preparing basic lead sulfate and a basic lead sulfate electrode from lead sulfate and lead oxide. According to the method, PbO, especially PbO produced by waste lead-acid batteries and lead sulfate, especially lead sulfate prepared from waste lead-acid batteries, are reacted to obtain three kinds of basic lead sulfate (mono-basic lead sulfate 1 BS, a tri-basic lead sulfate 3 BS and a quadri-basic lead sulfate 4 BS). The process is simple and feasible, the process of synthesizing the basic lead sulfate has 100% atom economy, the whole process meets the cleanproduction requirements, no three wastes are discharged, the production cost is low, and a new feasible scheme is provided for sustainable production of lead-acid batteries and recycling of waste lead-acid batteries.

Description

technical field [0001] The present invention relates to the fields of recycling waste lead-acid batteries and manufacturing new lead-acid batteries, in particular to a method of making PbSO 4 The method for preparing basic lead sulfate and its electrode by reacting with PbO. Background technique [0002] There are three common basic lead sulfates: monobasic lead sulfate (1BS, PbO·PbSO 4 ), tribasic lead sulfate (3BS, 3PbO·PbSO 4 ) and tetrabasic lead sulfate (4BS, 4PbO·PbSO 4 ). In the lead-acid battery industry, basic lead sulfate is formed slowly during the lengthy curing process of lead paste applied to the lead alloy grid. Generally, tetrabasic lead sulfate is formed in the positive plate and tribasic lead sulfate is formed in the negative plate. However, because the raw material lead paste contains metal lead and PbO with an indeterminate composition, the resulting basic lead sulfate is not uniform, which makes the consistency of the lead-acid battery plate poor. ...

Claims

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Application Information

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IPC IPC(8): H01M10/54H01M4/56H01M4/58H01M4/20H01M10/06C01G21/20
CPCH01M10/54H01M4/56H01M4/58H01M4/20H01M10/06C01G21/20Y02W30/84Y02E60/10
Inventor 雷立旭张东邰建魏会敏范珍珍周言庆
Owner SOUTHEAST UNIV
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