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Preparation method of basic lead sulfate

A lead sulfate and basic technology, applied in lead sulfate and other directions, can solve the problem of high price, and achieve the effect of being beneficial to labor and improving economic benefits

Inactive Publication Date: 2020-02-11
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the method for preparing basic lead sulfate mainly includes the reaction of lead sulfate and sodium hydroxide. This method needs to use a more expensive and highly corrosive strong base such as sodium hydroxide as a raw material; another method uses lead oxide and sulfuric acid. Lead reaction to prepare, but lead oxide needs to be prepared from other raw materials, the price is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0019] Add 47Kg of ammonium carbonate aqueous solution to 303Kg of lead sulfate to make a slurry. After the reaction is completed, add 10 Kg of sodium chloride under stirring, treat at 100°C for 1 hour under normal pressure, filter, and heat the solid to 200°C for 2 hours. The product is a Basic lead sulfate, purity 98.1%.

specific Embodiment 2

[0021] Add 70Kg of sodium carbonate aqueous solution to 303Kg of lead sulfate to make slurry. After the reaction is completed, add 5 Kg of cesium sulfate under stirring, treat at 80°C for 2 hours at 2 atmospheres, filter, and heat the solid to 330°C for 3 hours. The product is dibasic Formula lead sulfate, purity 98.8%.

specific Embodiment 3

[0023] Add 117Kg of ammonium bicarbonate aqueous solution to 303Kg of lead sulfate to make slurry. After the reaction is completed, add 1Kg of calcium sulfate under stirring, treat at 90°C for 1 hour at 3 atmospheres, filter, and heat the solid to 260°C for 2 hours. The product is tribasic Formula lead sulfate, purity 98.7%.

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Abstract

The invention relates to the technical field of comprehensive utilization of lead resources, and discloses a preparation method of basic lead sulfate. The method comprises the following steps: addinga desulfurizing agent to lead sulfate to react for desulfurization, adding a regulator for hydration treatment to induce crystal nucleus formation, filtering a hydrated mixture, and conducting heatingand decomposition to obtain the basic lead sulfate. The method can be used for preparing different types of basic lead sulfate by controlling the addition amount of the desulfurizing agent and the desulfurizing ratio.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of lead resources, in particular to a preparation method of basic lead sulfate. Background technique [0002] Basic lead sulfate, also known as basic lead sulfate, is a wide range of chemical raw materials used in plastics as anti-aging agents and as additives in lead-acid batteries. According to the composition ratio of lead oxide and lead sulfate in the components, it can be divided into monobasic lead sulfate (PbO.PbSO 4 ), dibasic lead sulfate (2PbO.PbSO 4 ), tribasic lead sulfate (3PbO.PbSO 4 ), tetrabasic lead sulfate (4PbO.PbSO 4 ). At present, the method for preparing basic lead sulfate mainly includes the reaction of lead sulfate and sodium hydroxide. This method needs to use a more expensive and highly corrosive strong base such as sodium hydroxide as a raw material; another method uses lead oxide and sulfuric acid. Lead reaction to prepare, but lead oxide needs to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G21/20
CPCC01G21/20C01P2006/80
Inventor 曹靖胡承康张俊丰
Owner XIANGTAN UNIV
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