Industrial production method for separating boron isotope product based on methyl-phenoxide-boron trifluoride complex

Abstract

The invention discloses an industrial production method for separating a boron isotope product based on a methyl-phenoxide-boron trifluoride complex, belonging to the technical field of separation of isotope. The industrial production method mainly aims to solve the problem that a methyl-phenoxide-boron trifluoride complex chemical reaction exchange rectifying method is serious during vacuum material carrying and the like. The industrial production method comprises the following steps: firstly, performing gas stripping and drying treatment to the methyl-phenoxide-boron trifluoride complex, continuously adding the methyl-phenoxide-boron trifluoride complex from a gas stripping tower kettle into a first exchange rectifying tower kettle, continuously extracting liquid in the fore exchange rectifying tower kettle into the next tower top, condensing steam at the top of the next tower top, and continuously entering the fore tower kettle; under pressure-reduced heating distillation, enabling a boron trifluoride gas and methyl ether gas to enter shell passes of a condenser and a catcher, enabling a coolant to travel the shell passes of the condenser and the catcher, wherein a minus 60DEG C methyl ether solution pump is conveyed to a spray device so as to spray a boron trifluoride gas, the boron trifluoride gas and the methyl ether gas are converted into the methyl-phenoxide-boron trifluoride complex. The industrial production method has the advantage of being capable of solving the problem of vacuum material carrying.

Description

Technical field: [0001] The invention belongs to the technical field of isotope separation, and in particular relates to an industrial production method for rectifying and separating boron isotope products based on the chemical exchange reaction of methyl ether-boron trifluoride complex. Background technique: [0002] Boron has two stable isotopes, boron-10 and boron-11, with natural abundances of 19-3% and 80.7%, respectively. Boron-10 has a very strong ability to absorb neutrons, and it is widely used in nuclear power, modern industry, military equipment and medicine. Boron-11 is a potential thermonuclear reaction material. Adding boron-11 to steel can greatly improve the performance of high temperature resistance and radiation resistance. At present, the high-abundance boron isotope products used in my country mainly rely on imports. There are three main methods for producing boron isotopes in the world: ether-boron trifluoride vacuum exchange distillation, methyl ether...

AI Technical Summary

Problems solved by technology

This separation method has disadvantages such as poor gas-liquid contact, long time to reach equilibrium, high pressure drop in the tower system, large system circulation, and high energy consumption. At the same time, it has problems such as low production capacity, low separation efficiency, and high separation cost.

[0006] The invention patent with Chinese patent number 200610013467.5 discloses a "method for separating boron-10 with three towers in series and single tower accumulative total reflux batch mining alternate operation", which uses three rectification towers with the same height and diameter in series Liquid storage tanks and other equipment carry out rectification, which relatively improves the separation efficiency, but the structure is complicated and the operation is troublesome

[0007] The invention patent with the Chinese patent number "200910010817.6" discloses a "different-diameter tower separation technology for boron-10 isotope", which uses three series-connected rectification towers with the same height and decreasing diameter to p-methyl ether-boron trifluoride The chemical exchange distillation of the complex directly changes the flow rate of the liquid phase and the gas phase, increasing the chance of the liquid phase and the gas phase in convective contact, but the operation is difficult, the production capacity is low, and the separation cost is high

In actual industrial installations, limited by the space at the top of the exchange distillation column and the concentration of reactants, boron trifluoride gas and methyl ether cannot be completely converted into methyl ether-boron trifluoride complexes, so part of the trifluoride Boron gas is taken out by the vacuum system, causing serious loss and waste

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