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Method for preparing magnesium deuteride by adopting high-temperature direct process

A magnesium deuterium, direct method technology, applied in the intersection of material science and nuclear technology, can solve the problems of high cost, high activity, and high equipment requirements, and achieve the effects of high product yield, simple operation process and good purity

Active Publication Date: 2014-12-03
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

These two preparation methods can theoretically prepare high-purity magnesium deuteride, but due to their respective characteristics, there are great difficulties in industrial production
For example, the first method requires high temperature and pressure control, and it is difficult to prepare high-purity magnesium deuteride. At present, there are many reports of similar methods in the preparation of magnesium hydride, but most of the raw materials used are micron-sized magnesium powder. The activity is very high, and there are also great safety hazards in the production process; the second preparation method also uses micron-sized magnesium powder as a raw material for ball milling reaction in a high-purity hydrogen atmosphere, which has high requirements for raw materials and equipment. Complex, high cost, difficult to achieve industrial scale production

Method used

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  • Method for preparing magnesium deuteride by adopting high-temperature direct process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Under argon protection, take by weighing 603g of magnesium nuggets with a particle size of 8mm and a purity of 99.99%, put them into a high-temperature and high-pressure reactor, and place the reactor in a high-pressure reactor cabin, such as figure 1 As shown: Use argon to replace the gas in the kettle cabin, pump the pressure in the cabin to a negative pressure of 0.023MPa, introduce 99.999% high-purity deuterium gas, and pump it again to a negative pressure of 0.018MPa, repeat the operation twice; at 10°C Rapidly raise the temperature to 266°C / min, feed high-purity deuterium gas, increase the pressure of deuterium gas in the kettle cabin to 100 atmospheres, and react for 50 minutes; heat up at a speed of 10°C / min for 38 minutes to 422°C to stop heating, keep the temperature constant and The deuterium gas flow rate continues to react for 70 minutes until the pressure of the deuterium gas pressure gauge and the autoclave are completely balanced; at this time, the temper...

Embodiment 2

[0025] Under an argon atmosphere, the magnesium block with a purity of 99.99% is cut into small pieces with a particle size of 10 mm, weighed 2512 g, and put it into a high-temperature and high-pressure reactor, and the reactor is placed in a high-pressure reactor cabin; Replace the gas in the tank with gas, pump the pressure in the cabin to a negative pressure of 0.019MPa, introduce 99.999% high-purity deuterium gas, and pump it again to a negative pressure of 0.015MPa, and repeat the operation 4 times; at a heating rate of 20°C / min Rapidly raise the temperature to 296°C, feed high-purity deuterium gas, and increase the pressure of deuterium gas in the tank to 150 atmospheres; after 72 minutes of reaction, simultaneously raise the temperature at a rate of 12°C / min for 34 minutes to 533°C to stop heating, keep the temperature constant and The deuterium gas flow rate continued to react for 85 minutes until the pressure of the deuterium pressure gauge and the autoclave were compl...

Embodiment 3

[0027] Under the protection of argon, use fine sandpaper to polish the oxide layer on the surface of the magnesium block with a purity of 99.99% to a metallic luster, cut it into small pieces with a particle size of 14mm, weigh 408g, and put it into a high-temperature and high-pressure reactor. The device is placed in the high-pressure reactor cabin, such as figure 1 As shown: Replace the gas in the kettle cabin with argon, pump the pressure in the cabin to a negative pressure of 0.020MPa, introduce 99.999% high-purity deuterium gas, and pump it again to a negative pressure of 0.015MPa, repeat the operation 3 times; / min to quickly raise the temperature to 245°C, introduce high-purity deuterium gas, and increase the pressure of deuterium gas in the tank to 200 atmospheres; control the flow rate to 2041ml / min, and at the same time raise the temperature at a speed of 8°C / min for 55min to 537 Stop heating at ℃, keep the temperature and deuterium flow rate constant, and continue t...

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Abstract

The invention relates to a method for preparing magnesium deuteride by adopting a high-temperature direct process, belonging to the crossing field of material science and nuclear technology. According to the method, magnesium reacts with deuterium gas at the high temperature to generate magnesium deuteride; the problems of large-scale industrialized preparation technology and preparation purity of magnesium deuteride are solved, no complicated production device is used, the required preparation device is simple and easily purchased, and a magnesium deuteride production line can be safely built under the existing factory conditions; a preparation process is simple and easy to carry out and is safe and reliable due to protection of inert gas; the product yield is relatively high, the product purity and stability are relatively good, and magnesium deuteride can be stored for a long term; no three wastes are generated in the preparation process, and the preparation process is harmless to a human body and the environment, is environment-friendly and is of great significance on large-scale industrialized safe preparation and large-scale application of high-purity magnesium deuteride.

Description

technical field [0001] The invention relates to a method for preparing magnesium deuteride by a high-temperature direct method, which belongs to the cross field of material science and nuclear technology. Background technique [0002] In today's world, energy is still the resource that countries all over the world strive to compete for. With the increasing shortage of fossil fuels, energy problems and energy conflicts among countries have become more prominent, which is directly related to world peace and stability. It can be said that energy is a determinant of a country's comprehensive national strength and world competitiveness. The competition for energy in today's world is mostly concentrated on fossil fuels, and fossil fuels are non-renewable resources. To achieve long-term abundance and sustainable supply of energy, the key lies in the development of new energy sources. [0003] Deuterium is a stable isotope of hydrogen, also known as deuterium, symbol D or 2 H, com...

Claims

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Application Information

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IPC IPC(8): C01F5/00
Inventor 刘吉平刘晓波
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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