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Method for preparing lead tetraoxide from waste lead-acid batteries and application

A technology of trilead tetraoxide and lead-acid batteries, which is applied in the direction of lead oxide, battery recycling, recycling technology, etc., can solve the problems of low economic benefit, high energy consumption of lead paste recycling, and environmental pollution, and achieve high economic benefit, The effect of low cost and simple operation

Active Publication Date: 2015-04-29
SHENZHEN CENT POWER TECH
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Problems solved by technology

[0004] In view of this, the present invention provides a method for preparing PbO4 from waste lead-acid batteries, which solves the technical problems of high energy consumption, environmental pollution, and low economic benefits in the prior art of recycling waste lead-acid battery lead paste

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  • Method for preparing lead tetraoxide from waste lead-acid batteries and application

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0016] Please refer to Fig. 1, Fig. 1 shows the flow chart of the method for preparing PbO4 from waste lead-acid batteries according to an embodiment of the present invention, including the following steps:

[0017] Step S01, preprocessing:

[0018] Drying and grinding the positive electrode paste of the waste lead-acid battery to obtain the first powder;

[0019] Step S02, preparing lead citrate:

[0020] adding the first powder into an aqueous solution containing a mixture of citric acid and alkali metal citrate, stirring and reacting, separating the solid from the liquid, and collecting the so...

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Abstract

The invention is applicable to the field of waste battery recovery technologies and provides a method for preparing lead tetraoxide from waste lead-acid batteries. The method comprises the steps of carrying out pretreatment, preparing lead citrate, preparing second powder, pulping the second powder, preparing the lead tetraoxide, and the like. According to the method for preparing the lead tetraoxide from the waste lead-acid batteries, provided by the invention, lead sulfate and lead monoxide in lead plaster of the waste lead-acid batteries are converted into the lead citrate by using citric acid and alkali metal citrate, and then, the lead tetraoxide is prepared, so that the method has a significant economic benefit, and the technical problem of environment pollution caused by a waste lead-acid battery lead recovery method in the prior art is solved; and the method for preparing the lead tetraoxide from the waste lead-acid batteries is simple in operation, low in cost and high in economic benefit, thereby being very applicable to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of utilization of waste lead-acid batteries, in particular to a method and application for preparing trilead tetroxide from waste lead-acid batteries. Background technique [0002] Trilead tetroxide (red lead) is a three-lead composite oxide (containing lead monoxide), with fine grains and glossy dry state, and is used in powder form. Compared with other lead powders, lead particles in trilead tetroxide have two oxidation forms, Pb(II) and Pb(IV), which are arranged together with oxygen to form a spinel crystal structure. The main components are PbO (lead monoxide, commonly known as Huang Dan) and PbO 2 As an additive, it is added to the positive electrode active material to play a nucleating role and promote the conversion of the active material, and because it is in a high oxidation state, it can reduce the energy loss of the formation and shorten the time of the formation. Utilize Pb 3 o 4 The charact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/54C01G21/02
CPCY02W30/84
Inventor 张华农梁国标衣守忠廖富兴
Owner SHENZHEN CENT POWER TECH
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