Method and system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride

A boron trifluoride, high-concentration boron technology, applied in the direction of boron halide compounds, boron halides, etc., can solve the problems of large consumption of raw materials, increased product cost, unrealized industrial production, etc., to reduce energy consumption, reduce The effect of production costs

Active Publication Date: 2018-07-13
大方元素(广东)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing technology of industrialized production of boron isotope is the isotope exchange technology of boron trifluoride/anisole working system, but because the energy consumption of the existing process is relatively large (the energy is mainly consumed at the top of the exchange tower to generate heat for taking away the complex operation and the operation of supplying complex decomposition heat at the bottom of the exchange tower); in addition, due to the low extraction rate of the raw material boron trifluoride, not only the raw material consumption is large but also the boron-11 isotope content in the tail gas boron trifluoride is much lower It is discharged as

Method used

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  • Method and system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride
  • Method and system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride
  • Method and system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride

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Embodiment 1

[0036] This embodiment adopts the working system of boron trifluoride / anisole, and the raw material boron trifluoride is boron trifluoride in a commercially available steel cylinder with a natural abundance of boron-10 of 19.8atom%. The flow rate of the raw material is 392.1±0.5ml / min. -10 boron trifluoride product flow rate is 73.5±0.5ml / min (about 17kg boron-10 / y), boron-11 boron trifluoride product flow rate is 318.6±0.5ml / min (about 83kg boron-11 / y).

[0037] In the present embodiment, there are 3 concentration towers in total to obtain an annual output of 17kg of net boron-10 (the boron-10 isotope concentration reaches 99atom%), and a total of 2 extraction towers to obtain an annual output of 83kg of net boron-11 (boron-11 The isotope concentration reaches 99atom%).

[0038] The extraction tower in the extraction section and the concentration tower in the concentration section are both countercurrent contact gas-liquid mass transfer towers.

[0039] The operating tempera...

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Abstract

The invention discloses a method and a system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride. With a small amount of commercially available bottled boron trifluoride as a material and a boron trifluoride/nitromethane or ether compound as a boron isotopes exchange working system, by cold-heat reflux at a concentration station and an extraction station in a cascade device, the boron trifluoride and a complex produced by the nitromethane or ether compound absorbing the boron trifluoride undego boron isotopes exchange, realizing the circulating reflux separation of boron-10 and boron-11. The system has a compact structure, is easy to operate, can be easily continuously automated, and not only greatly reduces the dosage of the boron trifluoride material, but also solves the problem of waste boron trifluoride discharge, moreover, energy consumption is reduced by about 80 percent, energy saving and zero discharge are realized, the production cost is greatly reduced, and the concentrations of the obtained boron-10 and boron-11 products are higher than or equal to 99 atom percent.

Description

Technical field: [0001] The invention relates to the technical field of stable isotope boron-10 and boron-11 production, in particular to a method and system for simultaneously producing high-concentration boron-10 boron trifluoride and high-concentration boron-11 boron trifluoride. Background technique: [0002] The boron element in all boron-containing substances in nature is composed of two stable isotopes boron-10 and boron-11, and their natural content (called natural abundance) is 19.8atom% and 80.2atom% respectively. Boron is relatively abundant in nature, but it is a worldwide problem to successfully separate the isotopes boron-10 and boron-11 from boron. Boron-10 has a strong ability to absorb neutrons, and the thermal neutron reaction cross section σ(n,α) is 3838 targets, while the natural boron neutron absorption cross section σ a There are only 750 targets, and the neutron absorption capacity of boron-10 is 20 times that of lead, 500 times that of concrete, and ...

Claims

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Application Information

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IPC IPC(8): C01B35/06
CPCC01B35/061
Inventor 杨国华张子庚
Owner 大方元素(广东)科技有限公司
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