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Method for producing enriched boric-10 acid from trifluoride-anisole complex and application thereof

A technology of boron trifluoride and anisole, which is applied in the field of boric acid production, can solve the problem that the impurity content is difficult to meet the requirements, and achieve the effect of less impurity content

Inactive Publication Date: 2012-11-14
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since nuclear power plants have very strict requirements on the impurities contained in boron-10 acid, it is difficult to meet the requirements with the above methods alone.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Will 10 B The boron trifluoride-anisole complex with an abundance of 30% is added dropwise to the reaction kettle, reacts with the methanol solution of sodium methoxide in the kettle, operates under ice bath for 5-10 minutes, and then conducts a constant temperature water bath to make When the reaction is stabilized within the range of 40-50°C, start timing. After 40-50 hours of reaction, stop heating, continue to reflux to cool down, and then centrifuge the reaction mixture to separate layers. Transfer the centrifuged supernatant to the fractionation device, turn on the condensed water and the constant temperature water bath, heat the mixture, start collecting fractions when the temperature rises to about 50°C, and stop collecting fractions when the temperature rises to 60°C. The collected fractions are salted out and layered, and then mixed with deionized water, and the solid obtained by suction filtering the mixture is dried, which is boric acid. The abun...

Embodiment 2

[0026] Example 2: Will 10 B The boron trifluoride-anisole complex with an abundance of 60% is added dropwise to the reaction kettle, reacts with the methanol solution of sodium methoxide in the kettle, operates under ice bath for 10-15 minutes, and then conducts a constant temperature water bath to make When the reaction is stabilized within the range of 45-55°C, start timing. After 50-60 hours of reaction, stop heating, continue to reflux to cool down, and then centrifuge the reaction mixture to separate layers. Transfer the centrifuged supernatant to the fractionation device, turn on the condensed water and the constant temperature water bath, heat the mixture, start collecting fractions when the temperature rises to about 55°C, and stop collecting fractions when the temperature rises to 60°C. The collected fractions are salted out and layered, and then mixed with deionized water, and the solid obtained by suction filtering the mixture is dried, which is boric acid. The abu...

Embodiment 3

[0027] Embodiment 3: will 10 B The boron trifluoride-anisole complex with an abundance of 90% is added dropwise to the reaction kettle, reacts with the methanol solution of sodium methoxide in the kettle, operates under ice bath for 15-20 minutes, and then conducts a constant temperature water bath to make When the reaction is stabilized within the range of 50-60°C, start timing. After 45-55 hours of reaction, stop heating, continue to reflux to cool down, and then centrifuge the reaction mixture to separate layers. Transfer the centrifuged supernatant to the fractionation device, turn on the condensed water and the constant temperature water bath, heat the mixture, start collecting fractions when the temperature rises to about 53°C, and stop collecting fractions when the temperature rises to 60°C. The collected fractions are salted out and layered, and then mixed with deionized water, and the solid obtained by suction filtering the mixture is dried, which is boric acid. The ...

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PUM

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Abstract

The invention relates to a method for producing enriched boric-10 acid from a trifluoride-anisole complex and application thereof. The method comprises the following steps: reacting a boron trifluoride-anisole complex with excessive sodium methoxide methanol solution, operating in an ice bath for 5-25 minutes, carrying out thermostatic water bath, reacting for 40-60 hours while keeping the reaction temperature within the range of 40-60 DEG C, stopping heating, and carrying out centrifugal stratification; fractionating the centrifugated supernatant: heating the mixture, starting to collect the fraction when the temperature rises to 50 DEG C, and stopping collecting the fraction when the temperature rises to 60 DEG C; and carrying out salting-out stratification on the collected fraction, mixing with deionized water, carrying out vacuum filtration on the mixture to obtain a solid, and drying to obtain the boric acid. The enriched boric-10 acid is used in the field of production of 10B-isotope-enriched downstream boric acid products, nuclear-grade boric acids and other enriched boric-10 acids by an anisole chemical exchange fractionation process. The production raw materials are from a closed system; and the invention has the impurity removal link, so the product purity is higher, thereby lowering the difficulty of subsequent boric acid production.

Description

technical field [0001] The invention relates to the production of enriched boron-10 acid by using boron trifluoride-anisole complex as main raw material 10 B boric acid), suitable for the field of boric acid production, mainly used for the enrichment of nuclear grade boric acid and various functions 10 Production of B boric acid. Background technique [0002] Boric acid is the trihydrate of boron oxide (B 2 o 3 ·3H 2 O), it is not only a multifunctional important chemical basic raw material, but also a necessity for national security, aerospace and nuclear industries, and plays an important role in the development of national economy and industrial and agricultural production. This technology is aimed at nuclear grade boric acid and 10 B abundance required enrichment 10 Production of B boric acid. [0003] With the rapid development of my country's nuclear power, aerospace and other industries, the demand for special boric acid has increased, and higher requirements h...

Claims

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Application Information

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IPC IPC(8): C01B35/10
Inventor 徐姣张卫江
Owner TIANJIN UNIV
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