A method for preparing high-purity deuterium gas by heavy water electrolysis

A high-purity, deuterium technology, applied in electrolysis components, electrolysis processes, chemical instruments and methods, etc., can solve the problems of large waste of raw materials, high purification costs, and high HD content, and achieve reduced waste, high purity, and convenient expansion. Effect

Active Publication Date: 2011-09-14
PERIC SPECIAL GASES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first three methods have the disadvantages of high energy consumption, high risk, high HD (deuterated hydrogen) content, and small gas production.
Heavy water electrolysis is a better method for producing deuterium gas, but common heavy water electrolysis has defects such as high HD content, high purification cost, and large waste of raw materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) choose D 2 Heavy water with an O (deuterium oxide) content of 99.8% is used as a raw material, and the heavy water is heated and degassed to reduce the dissolved N in the heavy water 2 , O 2 , CO 2 and other impurity gases to reduce the pressure of the purification process. When performing the heating and degassing operation, the heating temperature is 100° C., and the heating time is 5 minutes.

[0038] (2) The degassed heavy water is electrolyzed, and the electrolyte mass concentration added to the heavy water is 100g / L. The electrolyte is sodium carbonate that does not contain H element, and the purity is superior grade. To prevent the electrolyte from containing moisture, the electrolyte needs to be heated at 180°C for 3 hours to dry it before use.

[0039] After electrolysis of heavy water, deuterium gas and oxygen gas are obtained respectively, and the oxygen gas is evacuated at this time.

[0040] (3) The obtained deuterium gas is dried and dehydrated. ...

Embodiment 2

[0049] (1) choose D 2 Heavy water with an O (deuterium oxide) content of 99.9% is used as a raw material, and the heavy water is heated and degassed to reduce the dissolved N in the heavy water. 2 , O 2 , CO 2 and other impurity gases to reduce the pressure of the purification process. When performing the heating and degassing operation, the heating temperature is 60° C., and the heating time is 3 minutes.

[0050](2) The degassed heavy water is electrolyzed, and the electrolyte mass concentration added to the heavy water is 10g / L. Potassium carbonate without H element is selected as the electrolyte, and the purity is superior pure. To prevent the electrolyte from containing moisture, the electrolyte needs to be heated at 180°C for 4 hours to dry it before use.

[0051] After electrolysis of heavy water, deuterium gas and oxygen gas are obtained respectively, and the oxygen gas is evacuated at this time.

[0052] (3) The obtained deuterium gas is dried and dehydrated. T...

Embodiment 3

[0061] (1) choose D 2 Heavy water with an O (deuterium oxide) content of 99.9% is used as a raw material, and the heavy water is heated and degassed to reduce the dissolved N in the heavy water. 2 , O 2 , CO 2 and other impurity gases to reduce the pressure of the purification process. When performing the heating and degassing operation, the heating temperature is 80° C., and the heating time is 4 minutes.

[0062] (2) The degassed heavy water is electrolyzed, and the electrolyte mass concentration added to the heavy water is 80g / L. The electrolyte is sodium deuterium oxide that does not contain H elements, and the purity is superior. To prevent the electrolyte from containing moisture, the electrolyte needs to be heated at 180°C for 3 hours to dry it before use.

[0063] After electrolysis of heavy water, deuterium gas and oxygen gas are obtained respectively, and the oxygen gas is evacuated at this time.

[0064] (3) The obtained deuterium gas is dried and dehydrated. ...

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Abstract

The invention belongs to the technical field of special gas preparation, and relates to a method for preparing high-purity deuterium gas by electrolysis of heavy water. The method firstly heats and degasses heavy water with a deuterium oxide content of not less than 99.8%, and then electrolyzes the degassed heavy water to obtain deuterium gas and oxygen respectively after electrolysis. Evacuate the oxygen. Dry the deuterium gas to remove water. The dried deuterium gas is further deoxidized through a deoxidation catalyst. Deuterium deoxidation and nitrogen removal are performed on deuterium gas after deoxidation treatment. The deuterium gas after nitrogen removal is compressed to obtain high-pressure gas. The compressed deuterium gas is subjected to a pressure swing adsorption operation to further purify it. The resulting high-purity deuterium gas usually has a chemical purity of 99.999% and a deuterium isotopic purity of 99.9%.

Description

technical field [0001] The invention belongs to the technical field of special gas preparation, and relates to a method for preparing high-purity deuterium gas by electrolysis of heavy water. Background technique [0002] An important use of deuterium gas in national defense is as a raw material gas for deuterium fluoride laser weapons. The deuterium fluoride laser uses the reaction of deuterium gas and nitrogen trifluoride to generate excited state deuterium fluoride, and releases energy during the transition back to the steady state to generate a laser beam. The deuterium fluoride laser has the advantages of high energy, good beam quality, and good atmospheric transmission performance, and can be used as a comprehensive anti-missile weapon for ships and land. my country began to develop deuterium fluoride chemical lasers in the late 1970s. At present, it is progressing rapidly and has been listed as a killer weapon by the country. The improvement and stability of the deu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C01B4/00
Inventor 刘晓林王少波张洪彬刘保锋韦桂欢黄亚贾立峰闫云
Owner PERIC SPECIAL GASES CO LTD
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