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Rectifying process and device of stable isotopes produced by neon gas

A stable isotope, neon gas technology, applied in the separation of different isotopic elements, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of low production capacity of neon isotope production equipment, reduce the amount of material transmission, overcome the difficulty of amplification, The effect of simplifying operations

Active Publication Date: 2017-05-31
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Since neon isotopes are key materials for manufacturing lasers such as laser gyroscopes, and involve various application fields such as national defense, aerospace, machining, and medical equipment, in order to promote the rapid development of civilian nuclear technology, it is urgent to develop neon isotopes with independent intellectual property rights. Advanced production technology to solve the bottleneck of low production capacity of existing neon isotope production equipment

Method used

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  • Rectifying process and device of stable isotopes produced by neon gas
  • Rectifying process and device of stable isotopes produced by neon gas
  • Rectifying process and device of stable isotopes produced by neon gas

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Embodiment

[0041] figure 1 It is a schematic diagram of the rectification process for preparing neon isotopes composed of n-stage cryogenic rectification towers in the present invention. The rectification device includes two major systems: a raw material purification system and a low-temperature rectification cascade system. The cryogenic rectification cascade system is all placed in a cold box, or placed in a multi-layer insulated vacuum container, and its vacuum degree reaches 5×10 -6 Pa or more.

[0042] Reference figure 1 In the process shown, after the high-purity natural neon gas is released from the natural high-purity neon gas cylinder 1, it is pressurized by the first compressor (membrane compressor) 4 to 20~20 through the pressure reducing valve 2 and the raw material buffer tank 3. 30bar, after being pre-cooled by the first heat exchanger 5, it passes through two parallel dewatering drying towers 6 (respectively equipped with dewatering drying columns 6A and 6B), and two parallel...

Embodiment 2

[0048] Such as figure 2 As shown, compared with Example 1, except for the neon isotope rectification device composed of two-tower cascade in this example, the rest are the same.

[0049] After the natural neon gas raw material is dried and dehydrated, adsorbed at low temperature to remove nitrogen and oxygen impurities, it enters the two-tower cascade assembly of low-temperature rectification. Both the first-stage distillation tower T1 and the second-stage distillation tower T2 are equipped with stripping sections. Part of the gas phase from the gas-liquid separator 14 is sent to the middle feed point of the first-stage rectification tower T1 through the medium-pressure throttle valve F1, and the materials in the first-stage rectification tower T1 are driven by the pressure difference through the regulating valve F2 is transported to the middle part of the second-stage distillation tower T2. Part of the material at the top of the tower is metered by the regulating valve V1, and ...

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Abstract

The invention relates to a rectifying process and device of stable isotopes produced by neon gas. The rectifying device comprises a raw material purifying system and a cryogenic rectification cascade system, wherein the raw material purifying system comprises a first compressor, a water removing and drying component and a denitrifying and deoxidizing component which are sequentially connected in the raw material neon gas inlet direction; the cryogenic rectification cascade system comprises a condensing component and a cryogenic rectification cascade component which are sequentially connected; the cryogenic rectification cascade component is formed by cascading n stages of rectification towers, wherein n is an integer that is not less than 1; a cascade condenser is arranged between the two adjacent stages of rectification towers, materials from a tower kettle of the previous stage of rectification tower are conveyed into a feeding point of the later stage of rectification tower, part of the materials at the tower top of the previous stage of rectification tower is conveyed into the cascade condenser and is condensed into a liquid phase to be returned into the previous stage of rectification tower, and the other part of the materials is condensed and returned. Compared with the prior art, the rectifying process and device provided by the invention overcome the defect of difficult amplification of a thermal diffusion method, are suitable for large-scale production needs of kilograms, dozens of kilograms and even hundreds of kilograms and can realize long-term and stable operation.

Description

Technical field [0001] This invention relates to high abundance 22 Ne and 20 The technical field of Ne production, in particular, relates to a rectification process and device for producing stable isotopes of neon gas. Background technique [0002] In 1912, J.J. Thomson discovered two stable isotopes in natural neon in a cationic magnetic analyzer ( 20 Ne and 22 Ne), this discovery also confirmed for the first time that non-radioactive elements also have isotopes. It has been confirmed that natural neon gas is caused by 20 Ne, 21 Ne and 22 The mixture of three stable isotopes of Ne has natural abundances of 90.47%, 0.28% and 9.25%, respectively. [0003] 22 Ne and 20 Ne has the characteristic of light intensity-frequency of double convex peak, and it is the key material of helium-neon laser used to make laser gyro. The laser gyroscope is a new type of inertial navigation instrument that can accurately determine the position of a moving object. It has extremely high brightness, exc...

Claims

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Application Information

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IPC IPC(8): B01D59/04
CPCB01D59/04
Inventor 田叶盛李虎林姜永悦周健跃吉永喆龙磊肖敬美蔡扬
Owner SHANGHAI RES INST OF CHEM IND
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