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Method for preparing high purity tetrabasic lead sulfate by using lead powder used for production of lead acid battery

A four-basic lead sulfate and lead-acid storage battery technology, applied in the direction of lead sulfate, etc., can solve the problems of high product impurity content, low production efficiency, high raw material cost, etc., achieve high product purity, prolong cycle life, and improve battery plate The effect of intensity

Active Publication Date: 2014-07-23
CHAOWEI POWER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the preparation methods of tetrabasic lead sulfate are mostly used, such as compounding of pure lead oxide and sulfuric acid, mechanical co-researching of lead oxide and lead sulfate, high-temperature solid-phase reaction method according to atomic ratio, and reuse of waste battery lead paste (such as CN 103022594 A) and other methods, but these methods have the disadvantages of high raw material cost, low energy consumption, low production efficiency, and high impurity content in the product

Method used

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  • Method for preparing high purity tetrabasic lead sulfate by using lead powder used for production of lead acid battery
  • Method for preparing high purity tetrabasic lead sulfate by using lead powder used for production of lead acid battery
  • Method for preparing high purity tetrabasic lead sulfate by using lead powder used for production of lead acid battery

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Experimental program
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Effect test

Embodiment 1

[0041] (1) Raw material preparation: Accurately weigh the lead powder used in the production of lead-acid batteries, calculate the content of lead oxide and free lead according to the degree of oxidation of the lead powder, and use the molar ratio of lead element of lead oxide: sulfuric acid as 4.0:1 Take sulfuric acid solution A (used in the first step reaction corresponding to the reaction with lead oxide), take sulfuric acid solution B (used in the second step reaction) according to the molar ratio of lead element of free lead: sulfuric acid is 4.0:1 corresponding to the lead oxide reaction with free lead conversion).

[0042] (2) The first step reaction: Add lead powder, distilled water and sulfuric acid solution A into the reactor, the mass ratio of lead powder to distilled water is 1:1, the top cover of the reactor is connected to the condensation reflux system, and the bottom of the reactor is connected to the air pump. Continuously ventilate the air with a flow rate of...

Embodiment 2

[0047] (1) Raw material preparation: Accurately weigh the lead powder used in the production of lead-acid batteries, calculate the content of lead oxide and free lead according to the degree of oxidation of the lead powder, and use the molar ratio of lead element of lead oxide: sulfuric acid as 5:1 Take sulfuric acid solution A (used in the first step reaction corresponding to the reaction with lead oxide), take sulfuric acid solution B (used in the second step reaction) according to the molar ratio of lead element of free lead: sulfuric acid is 5:1 corresponding to the lead oxide reaction with free lead conversion).

[0048] (2) The first step of reaction: Add lead powder, distilled water and sulfuric acid solution A into the reactor, the mass ratio of lead powder to distilled water is 1:2, the top cover of the reactor is connected to the condensation reflux system, and the bottom of the reactor is connected to the air pump. Continuously ventilate the air with a flow rate of 20...

Embodiment 3

[0052] (1) Raw material preparation: Accurately weigh the lead powder used in the production of lead-acid batteries, calculate the content of lead oxide and free lead according to the oxidation degree of the lead powder, according to the molar ratio of lead element of lead oxide: sulfuric acid is 5.5:1 Take sulfuric acid solution A (used in the first step reaction corresponding to the reaction with lead oxide), take sulfuric acid solution B (used in the second step reaction) according to the molar ratio of lead element of free lead: sulfuric acid is 5.5:1 corresponding to the lead oxide reaction with free lead conversion).

[0053] (2) The first step reaction: Add lead powder, distilled water and sulfuric acid solution A into the reactor, the mass ratio of lead powder to distilled water is 1:3, the top cover of the reactor is connected to the condensation reflux system, and the bottom of the reactor is connected to the air pump. Continuously ventilate the air with a flow rate ...

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Abstract

The invention discloses a method for preparing high purity tetrabasic lead sulfate by using lead powder used for production of a lead acid battery, which is characterized in that a simple two-step reaction method is used for preparing the tetrabasic lead sulfate, the product purity is high, the particle size is small, the distribution of the particles is uniform, the product raw material lead powder is same with the lead powder used for producing the lead acid battery, impurity is not introduced, no impurity pollution problem is existed, and no adverse influence is generated to cell performance, the lead powder can be taken as an additive for obviously increasing the cell pole plate strength, the capacity loss of the cell at an initial stage is reduced, the cell cycle life is prolonged, in addition, no waste water and waste lead can be generated during a production process, and the method is green and has performance of environmental protection.

Description

technical field [0001] The invention relates to the field of preparation of lead-acid battery materials, in particular to a method for preparing high-purity tetrabasic lead sulfate by using lead powder for production of lead-acid batteries. Background technique [0002] Lead-acid battery has become the most widely used chemical power source in today's society due to its advantages of safety, reliability, simple manufacture, and low cost. But at the same time, lead-acid batteries have serious early capacity loss (PCL) problems such as excessive corrosion of the positive grid, softening and falling off of the active material, and sulfation of the negative electrode, which greatly restricts its development. [0003] The study found that the tetrabasic lead sulfate has the advantages of large crystal size and tight connection between grains. When the positive grid of the lead-acid battery exists, it can form the skeleton structure of the active material. It has high mechanical s...

Claims

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Application Information

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IPC IPC(8): C01G21/20
Inventor 赵磊李伟伟王振波马永泉
Owner CHAOWEI POWER CO LTD
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