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Method for deep eutectic solvent electrodeposition of lead powder

A deep eutectic solvent and electrodeposition technology, applied in the field of non-ferrous metallurgy, can solve the problems of low production efficiency, long production process, and high equipment requirements, and achieve the effect of strong activity, low material requirements, and high purity

Inactive Publication Date: 2014-03-19
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve technical problems such as long production process, complex process, low production efficiency, high equipment requirements, and serious pollution in the existing lead powder preparation technology. A method for obtaining lead powder by oxidizing lead and electrodepositing it, the present invention realizes through the following technical solutions

Method used

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Experimental program
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Effect test

Embodiment 1

[0015] The method of this deep eutectic solvent electrodeposition lead powder, its concrete steps are as follows:

[0016] (1) In an inert gas environment, first mix the quaternary ammonium salt and amide evenly at a molar ratio of 2:3 to form a deep eutectic solvent, then add lead oxide to the deep eutectic solvent at a temperature of 20°C to prepare Deep eutectic solvent electrolyte, wherein the quaternary ammonium salt is choline chloride, the amide is urea, and the amount of lead oxide added is 0.075mol / L;

[0017] (2) With graphite as the anode and the pretreated substrate as the cathode, under the conditions of controlling the temperature of the electrolyte at 40°C, the cell voltage at 1.8V, and the distance between the anode and the cathode at 0.5cm, prepared in step (1) Electrodeposit in deep eutectic solvent electrolyte for 1 hour, rinse the electrodeposited substrate with acetone and distilled water, and obtain lead powder on the substrate after drying, wherein the s...

Embodiment 2

[0019] The method of this deep eutectic solvent electrodeposition lead powder, its concrete steps are as follows:

[0020] (1) In an inert gas environment, first mix the quaternary ammonium salt and amide evenly at a molar ratio of 5:1 to form a deep eutectic solvent, and then add lead oxide to the deep eutectic solvent at a temperature of 100°C to prepare Deep eutectic solvent electrolyte, wherein the quaternary ammonium salt is benzyltriethylammonium chloride, the amide is thiourea, and the amount of lead oxide added is 0.005mol / L;

[0021] (2) With graphite as the anode and the pretreated substrate as the cathode, under the conditions of controlling the electrolyte temperature at 100°C, the cell voltage at 2.5V, and the distance between the anode and the cathode at 2cm, the low Electrodeposit in the eutectic solvent electrolyte for 6 hours, rinse the substrate after electrodeposition with acetone and distilled water, and obtain lead powder on the substrate after drying, whe...

Embodiment 3

[0023] The method of this deep eutectic solvent electrodeposition lead powder, its concrete steps are as follows:

[0024] (1) In an inert gas environment, first mix the quaternary ammonium salt and amide evenly at a molar ratio of 3:2 to form a deep eutectic solvent, then add lead oxide to the deep eutectic solvent at a temperature of 80°C to prepare Deep eutectic solvent electrolyte, wherein the quaternary ammonium salt is tetrabutylammonium hydrogen sulfate, the amide is acetamide, and the amount of lead oxide added is 0.035mol / L;

[0025] (2) Using graphite as the anode and the pretreated substrate as the cathode, under the conditions of controlling the electrolyte temperature at 80°C, the cell voltage at 2.2V, and the distance between the anode and the cathode at 1cm, the low Electrodeposit in the eutectic solvent electrolyte for 3 hours, wash the electrodeposited substrate with acetone and distilled water, and obtain lead powder on the substrate after drying, wherein the...

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Abstract

The invention relates to a method for deep eutectic solvent electrodeposition of lead powder, belonging to the technical field of non-ferrous metal metallurgy. The method comprises the steps of firstly uniformly mixing quaternary ammonium salt with amide to form a deep eutectic solvent under an inert environment, and then adding lead oxide into the deep eutectic solvent to prepare a deep eutectic solvent electrolyte; by taking graphite as an anode and taking a base body after pretreatment as a cathode, performing electrodeposition in the prepared deep eutectic solvent electrolyte, washing the base body after the electrodeposition with acetone and distilled water, and drying to prepare the lead powder on the base body. By adopting the method provided by the invention, the lead powder with high purity, fine particle size and strong activity can be prepared, and the method has the advantages of simple process, low requirements for equipment materials, relatively low energy consumption, economy and environmental friendliness.

Description

technical field [0001] The invention relates to a method for electrodepositing lead powder with a deep eutectic solvent, and belongs to the technical field of nonferrous metal metallurgy. Background technique [0002] Lead powder is an important chemical raw material. Because of its low melting point, good ductility and corrosion resistance, it can be used as an additive in powder metallurgy, a lubricant in electric carbon products, and an active material in lead battery plates. It is the main raw material, and it can also be used in sintering wear-resistant parts, clutches, brakes, pantograph devices for trams, etc. At present, the mechanical ball milling method is widely used in the preparation of lead powder. In this method, the lead ball is put into the ball mill, and the temperature in the cylinder is raised due to frictional heat release. This method has a large output and is easy to operate and control, but the prepared lead powder has problems such as large powder p...

Claims

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Application Information

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IPC IPC(8): C25C5/02
Inventor 华一新汝娟坚徐存英李坚张启波李艳龚凯周忠仁
Owner KUNMING UNIV OF SCI & TECH
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