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Preparation method for tellurium electrolyte

A preparation method and electrolyte technology, which can be applied to the improvement of process efficiency, photographic technology, instruments, etc., can solve the problems of difficult removal of potential, long time and high cost, and achieve low impurity content, low residual impurity, and long service time. Effect

Inactive Publication Date: 2012-06-13
ZHUZHOU KENENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the impurity elements contained in the anode during the electrolysis of coarse tellurium, such as Se, Pb, etc., are easy to accumulate in the electrolyte, resulting in high impurity content in the electrolytic cathode precipitates, resulting in unqualified products
The existing electrolyte formula mainly adds sodium hydroxide to improve the conductivity of the solution and at the same time increase the overpotential of hydroxide, but the potential is close to it is difficult to remove, and it leads to the enrichment of impurities in the electrolyte, so it is necessary to prepare a new one. Electrolyte, and preparation of new electrolyte is time-consuming and expensive

Method used

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  • Preparation method for tellurium electrolyte

Examples

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Effect test

example 1

[0022] Add 1000 grams of tellurium dioxide with a purity of 99.99% to 500 grams of sodium hydroxide with a purity of 99.99%, and then add 5 kg of pure water, and dissolve it in a container at 80°C to obtain an initial tellurium electrolyte with a concentration of 200 grams per liter Then, add 200 grams of solid sodium oxalate and 20 grams of solid potassium iodide in turn, and dissolve to obtain the final tellurium electrolyte.

example 2

[0024] Add 500 grams of tellurium dioxide with a purity of 99.99% to 250 grams of sodium hydroxide with a purity of 99.99%, and then add 2.5 kg of pure water, and dissolve it in the container at 80°C to obtain an initial tellurium electrolytic solution with a concentration of 200 grams per liter. Liquid; Then, add 100 grams of solid sodium oxalate and 10 grams of solid potassium iodide in turn, and dissolve to obtain the final tellurium electrolyte. All the other are the same as example 1.

example 3

[0026] Add 250 grams of tellurium dioxide with a purity of 99.99% to 125 grams of sodium hydroxide with a purity of 99.99%, and then add 1.25 kg of pure water. After dissolving in the container at 80°C, an initial tellurium electrolytic solution with a concentration of 200 grams per liter is obtained. Then, add 50 grams of solid sodium oxalate and 5 grams of solid potassium iodide successively, and dissolve to obtain the final tellurium electrolyte. All the other are the same as example 1.

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Abstract

The invention discloses a preparation method for a tellurium electrolyte. The invention aims to provide the preparation method for a tellurium electrolyte. The method is characterized by comprising the following steps: A, mixing tellurium dioxide, sodium hydroxide and pure water according to a solid-liquid weight ratio of 1: 0.5: 5, heating an obtained mixture to a temperature of 80 DEG C and allowing tellurium dioxide to dissolve after stirring so as to obtain an initial tellurium electrolyte, wherein the addition amount of sodium hydroxide is that 0.5 kg of sodium hydroxide is mixed with each 1 kg of tellurium dioxide; and B, sequentially adding solid sodium oxalate and solid potassium iodide into the initial tellurium electrolyte obtained in step A and dissolving solid sodium oxalate and solid potassium iodide so as to prepare the final tellurium electrolyte. The purity of tellurium dioxide used in the method is 99.99% and the purity of sodium hydroxide is also 99.99%. The method provided in the invention is mainly used for preparation of tellurium electrolyte with a purity more than 99.995%.

Description

technical field [0001] The invention relates to a method for preparing an electrolyte, in particular to a method for preparing a tellurium electrolyte. Background technique [0002] 80% of tellurium consumption is used in the metallurgical industry: adding a small amount of tellurium to steel and copper alloys can improve their cutting performance and increase hardness; tellurium is used as a carbide stabilizer in white cast iron to make the surface strong and wear-resistant ; Lead containing a small amount of tellurium can improve the corrosion resistance, wear resistance and strength of the material, and can be used as a sheath for submarine cables; adding tellurium to lead can increase the hardness of lead, which can be used to make battery plates and print lead. Tellurium can be used as an additive for petroleum cracking catalysts and as a catalyst for producing ethylene glycol. Tellurium oxide is used as a colorant for glass. High-purity tellurium can be used as an al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/22
CPCY02P10/20
Inventor 赵科湘
Owner ZHUZHOU KENENG NEW MATERIAL CO LTD
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