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Method for separating boron isotopes by taking boron-specific resin as simulated moving bed stationary phase

A technology for simulating moving bed and isotopes, which is applied in the field of boron isotope separation by simulated moving bed chromatography to achieve the effects of high separation efficiency, large separation factor and lower production cost

Inactive Publication Date: 2014-03-12
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there has been no public report on the method of separating boron isotopes using boron special effect resin as a simulated moving bed stationary phase.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of boric acid solution: Take 1.2kg of boric acid with an electronic balance and place it in a beaker, then add deionized water, stir and dissolve, and prepare a 4kg / m3 boric acid solution; prepare a hydrochloric acid solution with a pH value of 3;

[0024] Filtration of impurities: filter boric acid solution and hydrochloric acid solution with 0.45 μm filter membranes to remove impurities in each solution, and then perform ultrasonic degassing on the filtered solution, and the ultrasonic degassing time is 15 minutes, respectively to obtain simulated moving bed sample and eluent.

[0025] Simulated moving bed separation: The simulated moving bed is composed of 12 chromatographic columns, which are divided into 4 areas, each area is composed of 3 chromatographic columns; The height-to-diameter ratio is 20:1; the operating temperature of the simulated moving bed is 25°C. The sample liquid (boric acid solution) was continuously added to the simulated moving bed...

Embodiment 2

[0027] Preparation of boric acid solution: Take 2.4kg of boric acid with an electronic balance and place it in a beaker, then add deionized water, stir and dissolve, and prepare a 8kg / m3 boric acid solution; prepare a hydrochloric acid solution with a pH value of 5.

[0028] Filtration of impurities: filter the boric acid solution and hydrochloric acid with a 0.45 μm filter membrane to remove impurities in the solution, and then perform ultrasonic degassing on the filtered solution. The ultrasonic degassing time is 15 minutes, and the simulated moving bed sample and eluent.

[0029] Simulated moving bed separation: The simulated moving bed is composed of 24 chromatographic columns, divided into 4 areas, each area is composed of 6 chromatographic columns; The height-to-diameter ratio is 25:1; the operating temperature of the simulated moving bed is 25°C. Add the sample liquid continuously into the simulated moving bed chromatography separation system, and simultaneously elute ...

Embodiment 3

[0031] Preparation of boric acid solution: Take 3.6 kg of boric acid with an electronic balance and place it in a beaker, then add deionized water, stir and dissolve, and prepare a 12 kg / m3 boric acid solution; prepare a hydrochloric acid solution with a pH value of 4.

[0032] Filtration and impurity removal: filter boric acid solution and hydrochloric acid with 0.45 μm filter membrane to remove impurities in the solution, and then perform ultrasonic degassing on the filtered solution, and the ultrasonic degassing time is 15 minutes to obtain the sample injection solution and eluent.

[0033]Simulated moving bed separation: The simulated moving bed is composed of 16 chromatographic columns, which are divided into 4 areas, each area is composed of 4 chromatographic columns; The height-to-diameter ratio is 30:1; the operating temperature of the simulated moving bed is 25°C. Add the sample liquid continuously into the simulated moving bed chromatography separation system, and e...

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Abstract

The invention discloses a method for separating boron isotopes by taking boron-specific resin as a simulated moving bed chromatography stationary phase. The method comprises the following steps: (1) preparing a boric acid solution of a certain concentration and a hydrochloric acid solution of a certain pH value; (2) filtering to remove impurities: filtering with a filter membrane to remove impurities from each solution, and ultrasonically degassing; (3) carrying out simulated moving bed separation: continuously adding the boric acid solution serving as sampling liquid into a simulated moving bed chromatographic separation system, eluting with the hydrochloric acid solution, and collecting a boric acid solution which is rich in isotope <10>B from the raffinate hole of a simulated moving bed and collecting a boric acid solution which is rich in isotope <11>B from the extraction hole after the simulated moving bed system reaches balance, wherein the boron-specific resin is taken as a filler in a simulated moving bed chromatographic column. According to the method, the boron-specific resin is taken as the stationary phase, so that operation is easy, and a separating factor is high relatively.

Description

technical field [0001] The invention relates to a method for separating boron isotopes, in particular to a method for simulating moving bed chromatography to separate boron isotopes. Background technique [0002] There are two stable isotopes of boron in nature, boron-10 and boron-11, respectively with element symbols 10 B and 11 B said. Two isotopes of boron ( 10 B and 11 The natural abundances of B) are 19.8% and 80.2%, respectively. In recent years, the separation of boron isotopes has developed rapidly, mainly due to the huge difference in the capture cross section of boron isotopes for thermonuclei: 10 The thermal neutron capture cross-sectional area of ​​B is much larger than 11 B and natural boron. 10 The thermal neutron capture cross-sectional area of ​​B is 5 times that of natural boron, which is 11 770,000 times that of B. Therefore, high-abundance 10 B is widely used in nuclear industry and modern industry, mainly used as reactor control rods, thermal ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/30C01B35/02
Inventor 郭翔海包丽白鹏赵含雪
Owner TIANJIN UNIV