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Reduction preparing method of alkaline zinc cream

A zinc paste, alkaline technology, applied in the field of electrochemistry, can solve the problem that resin and KOH cannot be reused, and achieve the effect of reducing battery cost, significant economic benefits, and reducing emissions

Inactive Publication Date: 2008-11-19
BEIJING CHANGLI UNION ENERGY TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a reduction preparation method of alkaline zinc paste, which solves the problem that resin, KOH, etc. cannot be reused in the reduction preparation process of alkaline zinc paste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] Its concrete steps of the reduction preparation method of alkaline zinc paste of the present invention are as follows:

[0021] The first step is to divide the zinc paste into two layers through the sedimentation method (using the different specific gravity of several substances, and naturally settle after adding an excessive amount of potassium hydroxide solution), the upper layer is a mixed product of polymer resin and potassium hydroxide, and the lower layer is Residual polymer resin, zinc powder, zinc oxide and zincate substances, the settling time is greater than 2 hours;

[0022] The second step is to separate the polymer resin in the upper layer by physical sedimentation, add potassium hydroxide with a concentration of 6mol / L-8mol / L to dilute the remaining mixture, and settle again to separate layers. The upper layer is the residual polymer compound mixed with potassium hydroxide liquid, the lower layer is zinc powder, zincate substances and zinc oxide, and the s...

Embodiment 1

[0031] The main components of the alkaline zinc paste reaction product after discharge are: zinc oxide, zincate, polyacrylic acid resin, potassium hydroxide; the above reaction product is processed as follows:

[0032] The first step is to settle for 2.5 hours through an alkali-soluble tank, so that the alkaline zinc paste after discharge is divided into two layers. The upper layer is a mixed product of polyacrylic acid polymer resin and potassium hydroxide, and the lower layer is residual polyacrylic acid polymer resin. Zinc powder, zinc oxide and zincates;

[0033] The second step, use an alkali-soluble tank to separate the polyacrylic acid polymer resin in the mixed product of the upper layer, and then continue to add some 6mol / L potassium hydroxide to dilute the remaining mixture, and settle again. The settling time is 4 hours, and the upper layer Separation product for residual polyacrylic acid polymer resin and potassium hydroxide mixed solution;

[0034] The third step...

Embodiment 2

[0043] The main components of the alkaline zinc paste reaction product after discharge are: zinc oxide, zincate, sodium polyacrylate resin, potassium hydroxide; the above reaction product is processed as follows:

[0044] The first step is to settle for 2 hours in an alkali-soluble tank, so that the discharged alkaline zinc paste is divided into two layers, the upper layer is polyacrylic acid polymer resin and potassium hydroxide solution, and the lower layer is residual polyacrylic acid polymer resin, zinc powder, zinc oxide and zincates;

[0045] The second step, after separating the upper layer polyacrylic acid polymer resin with an alkali-soluble tank, dilute the lower layer mixture with 8mol / L potassium hydroxide, settle and separate layers again, the settling time is 3 hours, and the upper layer is the residual polyacrylic acid polymer resin and hydrogen Potassium oxide mixed liquid separation product;

[0046] The third step, repeat the second step repeatedly, repeated...

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Abstract

Disclosed is a method to prepare alkaline calamine cream through deoxidization, including the following steps: discharged alkaline calamine cream is divided into two layers through sedimentation, the upper layer is polymer resins and potassium hydroxide, and the lower layer is the mixture of remnant polymer resins, zinc powder, zinc oxide and zincate; the polymer resins is separated and the rest mixture is diluted through potassium hydroxide, and then sedimentation and delamination processes are carried out again and are repeated; separation process to separate polymer resins is carried out until all the polymer resins is separated out and the rest mixture is stirred so as to enable the zinc oxide and the zincate in the potassium hydroxide to prepare mixed electrolyte which then reacts in an electrodeposit tank so that discharged alkaline calamine cream and discharged alkaline calamine powder can be isolated from the anode; the isolates at the upper layer are stirred and condensed to get polymer resin; the zinc powder that is not reacted is dried so as to get zinc powder; KOH is not reacted and is directly recycled for further use; the finished products are mixed again according to certain ratio for further use. The method solves the problem that the resin, KOH, etc., in the discharged alkaline calamine cream can not be used for the second time.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a reduction preparation method of alkaline zinc paste. Background technique [0002] Alkaline zinc paste refers to the paste mixture with zinc powder, resin, slow-release agent and KOH solution as the main components used in the negative electrodes of batteries such as alkaline manganese batteries and zinc-air metal fuel cells. The reaction of alkaline zinc paste after discharge The main components of the product are: zinc oxide, zincate and other substances. The traditional process method can reduce the zinc oxide in the reaction product to zinc, but other additives such as: resin, KOH (potassium hydroxide), etc. Resins such as acrylic acid and sodium polyacrylate are expensive. When alkaline zinc paste is used in large alkaline zinc-containing batteries such as zinc-air metal fuel cells, if the traditional process is used for treatment, the reduction utili...

Claims

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Application Information

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IPC IPC(8): H01M10/54C22B7/00C25C1/16B09B3/00
CPCY02P10/20Y02W30/84
Inventor 周利民周跃民刘伟春王菁迅王艳境王羽洁
Owner BEIJING CHANGLI UNION ENERGY TECH CO
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