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A method of measuring the content of barium sulfate in lead paste of a lead acid battery

A lead-acid storage battery and a technique for its determination method, which is applied in the field of determination of barium sulfate content in lead-acid storage battery lead paste, can solve the problems of poor parallelism and consistency of experiments, high loss of barium ions, harsh processing conditions, etc., and achieve simple test method , good consistency and mild experimental conditions

Active Publication Date: 2016-04-27
CHAOWEI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is relatively good for the test of barium sulfate, but the material needs to be treated at high temperature, and the treatment conditions are harsh
And in the process of material transfer, the loss of barium ions is more, and the parallelism and consistency of the experiments before and after are poor.
Its accuracy is also poor, and the difference between before and after
Many questions remain about barium sulfate test

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of assay method of barium sulfate content in lead-acid storage battery lead paste, comprises the following steps:

[0034] (1) Weigh 0.1g (accurate to 0.0001g) of sample lead paste that has been dried and kept constant weight, put it into a clean beaker, add 20mL analytical pure 1+4 nitric acid solution, heat to boiling, and keep boiling for 5min , filter and wash the filter residue (washed with analytical pure 1+4 nitric acid solution) until there is no lead ion to obtain intermediate A, and the collected filtrate is marked as filtrate A for subsequent use.

[0035] In this step, the detection method is to filter and wash the filter residue until it is free of lead ions: take 1 mL of filtrate, add 2 drops of 20% sulfuric acid solution in mass concentration, and the filtrate remains transparent after standing for 5 minutes.

[0036] (2) Add 100mL of 30% sodium carbonate solution with a mass concentration of 100mL to intermediate A, heat to boiling, maintain boili...

Embodiment 2

[0041] A kind of assay method of barium sulfate content in lead-acid storage battery lead paste, comprises the following steps:

[0042] (1) Weigh 0.1g (accurate to 0.0001g) of sample lead paste that has been dried and kept constant weight, put it into a clean beaker, add 30mL analytical pure 1+4 nitric acid solution, heat to boiling, and keep boiling for 10min , filter and wash the filter residue (washed with analytical pure 1+4 nitric acid solution) until there is no lead ion to obtain intermediate A, and the collected filtrate is marked as filtrate A for subsequent use.

[0043] In this step, the detection method is to filter and wash the filter residue until it is free of lead ions: take 1 mL of filtrate, add 2 drops of 20% sulfuric acid solution in mass concentration, and the filtrate remains transparent after standing for 5 minutes.

[0044] (2) Add 300mL of 15% sodium carbonate solution with a mass concentration of 300mL to intermediate A, heat to boiling, maintain boilin...

Embodiment 3

[0049] A kind of assay method of barium sulfate content in lead-acid storage battery lead paste, comprises the following steps:

[0050] (1) Weigh 0.1g (accurate to 0.0001g) of sample lead paste that has been dried and kept constant weight, put it into a clean beaker, add 25mL analytical pure 1+4 nitric acid solution, heat to boiling, and keep boiling for 8 minutes , filter and wash the filter residue (washed with analytical pure 1+4 nitric acid solution) until there is no lead ion to obtain intermediate A, and the collected filtrate is marked as filtrate A for subsequent use.

[0051] In this step, the detection method is to filter and wash the filter residue until it is free of lead ions: take 1 mL of filtrate, add 2 drops of 20% sulfuric acid solution in mass concentration, and the filtrate remains transparent after standing for 5 minutes.

[0052] (2) Add 200mL of 25% sodium carbonate solution with a mass concentration of 200mL to Intermediate A, heat to boiling, and keep ...

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Abstract

A method of measuring the content of barium sulfate in lead paste of a lead acid battery is disclosed. The method includes dissolving lead oxide and lean in the lead paste by using a nitric acid solution, keeping the obtained solution, dissolving barium sulfate, mixing a filtrate with the solution obtained in the previous step, adding to a constant volume, measuring the content of Ba ions by using an ICP (Inductively Coupled Plasma) spectrograph, and calculating the content of the barium sulfate according to conservation. The method adopts barium ions as an invariant to calculate the content of the barium sulfate according to conservation. The method is simple, high in accuracy and good in measuring result consistency.

Description

technical field [0001] The invention relates to a method for determining the content of barium sulfate, in particular to a method for determining the content of barium sulfate in lead paste for lead-acid batteries. Background technique [0002] Barium sulfate is a colorless orthorhombic crystal or white amorphous powder, which is easy to agglomerate when dry. The relative density is 4.50 (15°C), and the melting point is 1580°C. Practically insoluble in water, ethanol and acids. Soluble in hot concentrated sulfuric acid. Polycrystalline transformation occurs around 1150 °C. Significant decomposition begins at about 1400°C. Chemical properties are stable. As an additive for the negative electrode of lead-acid batteries, barium sulfate itself is difficult to dissolve in acidic and alkaline solutions. In the existing chemical analysis technology, there are mainly two methods to detect the content of barium sulfate in the lead plaster. One is to use the nitric acid dissolu...

Claims

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Application Information

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IPC IPC(8): G01N21/73G01N1/28
CPCG01N1/28G01N21/73
Inventor 王江林项晨吴鑫代少振周丽马永泉
Owner CHAOWEI POWER CO LTD