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A mixed solvent for dissolving lead sulfate

A technology of mixed solvent and lead sulfate, applied in directions such as lead sulfate, can solve the problems such as can not be reused, and achieve the effects of low production cost, suitable scale and convenient operation process.

Inactive Publication Date: 2011-12-14
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0002] Due to corrosion, passivation and other reasons, lead-acid batteries cannot be used after 2-4 years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Take 40 kg of commercially available standard pure ethylenediaminetetraacetic acid (EDTA), 20 kg of industrial grade ammonium citrate, and distilled water to make up to 940 kg. Under ventilation, mix the ingredients in a closed device, stir and dissolve to obtain the product . The mixed solvent of each component sum is 1000 kilograms.

Embodiment 2

[0018] Take 50 kg of commercially available standard pure ethylenediaminetetraacetic acid (EDTA), 30 kg of industrial grade ammonium citrate, and distilled water to make up to 920 kg. Under ventilation, mix the ingredients in a closed device. After stirring and dissolving, the product is obtained. . The mixed solvent of each component sum is 1000 kilograms.

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PUM

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Abstract

A mixed solvent for dissolving lead sulfate, involving a chemical solvent, the solvent is composed of ethylenediaminetetraacetic acid (EDTA), ammonium citrate, distilled water, 4-5% of ethylenediaminetetraacetic acid (EDTA); ammonium citrate 2~3%; add distilled water to 100%; the sum of each component is 100%. First, weigh ethylenediaminetetraacetic acid (EDTA) and ammonium citrate according to the selected weight percentage, and then mix the weighed materials, then add distilled water, the amount of distilled water is added to 100% of the total weight, after It is the product after stirring and dissolving. The invention has strong economic benefit and environmental benefit. The recovery of lead sulfate has the characteristics of no pollution to the environment, simple equipment and process, convenient operation, high metal recovery rate, low production cost, and suitable scales.

Description

technical field [0001] The invention relates to a chemical solvent, in particular to a mixed solvent for dissolving lead sulfate. Background technique [0002] Due to corrosion, passivation and other reasons, lead-acid batteries cannot be used after 2-4 years. my country's annual waste of lead-acid batteries is huge, and it is increasing at a rate of 7% per year. Recycling useful substances in waste lead-acid batteries is not only related to the protection of national heavy metal resources, but also in line with the country's sustainable development strategy of protecting the environment and developing a circular economy. The basic raw materials for the manufacture of lead-acid batteries are metallic lead and sulfuric acid. In the process of production and use, lead compounds are formed on the battery plate through a series of chemical reactions, mainly lead salts such as lead sulfate. The purpose of recycling is to properly process these metals and metal compounds for re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20
Inventor 高恩君关锋朱明昌刘蕾高夏南张燕
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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