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Industrial production method of boron-10 isotope

An isotope and purpose technology, applied in the field of chemical synthesis and separation, can solve problems such as corrosion of equipment, blockage of pipelines, heat exchangers, production cannot be carried out continuously and stably, and achieve the effect of continuous and stable production and reduction of side reactions

Active Publication Date: 2019-06-28
刘禹超 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high water content of the boron trifluoride-methyl ether complex purchased from the market, even after dehydration treatment, the water content in the boron trifluoride-methyl ether complex is still as high as 0.01%-0.03%, and the side effects caused by water The reaction causes a large amount of by-products to block pipes, heat exchangers, etc., and severely corrodes equipment, making production unable to continue stably

Method used

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  • Industrial production method of boron-10 isotope

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The raw material methyl ether liquid is pumped to the molecular sieve adsorption tower, and passes through the molecular sieve bed from the lower part of the molecular sieve adsorption tower upwards, and the residence time is 30 minutes. The adsorption process was carried out at 0.5MpaG and 0°C. After molecular sieve adsorption treatment, the water content in the refined methyl ether was reduced to 0.001%. The raw boron trifluoride gas enters the low-temperature rectification tower, the temperature at the top of the tower is controlled at -105°C, and the pressure is controlled at O.1MpaG. After rectification, refined boron trifluoride comes out from the top of the tower, free of hydrogen fluoride and tetrafluoride Impurities such as silicon. Refined methyl ether flows through the complexation reactor tubes from top to bottom, refined boron trifluoride gas enters the complexation reactor tubes from bottom to top, methyl ether and boron trifluoride undergo complexation r...

Embodiment 2

[0033] The raw material methyl ether liquid is pumped to the molecular sieve adsorption tower, and passes through the molecular sieve bed from the lower part of the adsorption tower upwards, and the residence time is 45 minutes. The adsorption process was carried out at 0.1MpaG and -30°C. After molecular sieve adsorption treatment, the water content in the refined methyl ether was reduced to 0.0018%. The raw boron trifluoride gas enters the low-temperature rectification tower, the temperature at the top of the tower is controlled at -60°C, and the pressure is controlled at 0.8MpaG. After rectification, refined boron trifluoride comes out from the top of the tower, free of hydrogen fluoride and tetrafluoride Impurities such as silicon. Refined methyl ether flows through the complexation reactor tubes from top to bottom, refined boron trifluoride gas enters the complexation reactor tubes from bottom to top, methyl ether and boron trifluoride undergo complexation reaction on the...

Embodiment 3

[0035] The raw material methyl ether liquid is pumped to the molecular sieve adsorption tower, and passes through the molecular sieve bed layer upwards from the lower part of the adsorption tower, and the residence time is 60 minutes. The adsorption process was carried out at 1.0MpaG and 20°C. After molecular sieve adsorption treatment, the water content in the refined methyl ether was reduced to 0.002%. The raw boron trifluoride gas enters the low-temperature rectification tower, the temperature at the top of the tower is controlled at -85°C, and the pressure is controlled at 1.2MpaG. After rectification, refined boron trifluoride comes out from the top of the tower, free of hydrogen fluoride and silicon tetrafluoride and other impurities. Refined methyl ether flows through the complexation reactor tubes from top to bottom, refined boron trifluoride gas enters the complexation reactor tubes from bottom to top, methyl ether and boron trifluoride undergo complexation reaction ...

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Abstract

The invention provides an industrial production method of a boron-10 isotope and belongs to the field of chemical synthesis and separation. The industrial production method is invented mainly for solving the problem that boron-10 isotope cannot be continuously and stably produced at present. Methyl ether is pressurized to become liquid, a molecular sieve is used for adsorbing the methyl ether liquid, boron trifluoride gas is rectified by a low-temperature rectifying column and then comes out of a column top, and the methyl ether and the boron trifluoride are subjected to complexation reactionin a complexation reactor. The generated complex enters an exchange reaction distillation column. By heating the complex through a reboiler, the complex is heated to a temperature for decomposition, vapor is completely condensed as a liquid to reform a boron trifluoride-methyl ether complex, the refluxing liquid and the vapor are in convective contact for chemical exchange reaction to enable borontrifluoride-10 to enter a liquid phase from a gas phase successively and enter a column kettle with the downward flowing liquid, and the complex of boron trifluoride-11 is also continuously subjectedto exchange reaction and is transferred from the liquid phase to the gas phase to the top of the column. The industrial production method has the advantage of continuous and stable production.

Description

Technical field: [0001] The invention belongs to the field of chemical synthesis and separation, in particular to an industrial production method of boron-10 isotope. Background technique: [0002] There are two stable isotopes of boron in nature - boron-10 and boron-11, with relative abundances of 19.3% and 80.7%, respectively. Boron-10 has a high thermal neutron absorption cross-section, reaching 3825 targets, and its ability to capture thermal neutrons is about 80,000 times that of boron-11, and the absorption cross-section does not change due to changes in neutron energy, so it is a shielding Ideal material for neutrons. Based on this, boron-10 isotope has a wide range of uses in the fields of nuclear energy, defense industry, medicine and science and technology. [0003] The industrial production of boron-10 isotope is extremely difficult. At present, only a few countries such as the United States and Russia can industrially produce boron-10 isotope. These countries k...

Claims

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Application Information

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IPC IPC(8): C01B35/06
Inventor 刘小秦
Owner 刘禹超
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