Method for separating boron isotopes by simulated moving bed chromatography

A simulated moving bed and chromatographic separation technology, which is applied in the field of stable boron isotope separation by combining ion exchange chromatography and simulated moving bed technology, can solve problems such as no public reports, and achieve the effect of reducing production costs and high separation efficiency

Active Publication Date: 2011-08-10
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In recent years, simulated moving bed chromatography technology has achieved rapid development in drug separation, however, there is still no public report on the separation of boron isotopes using simulated moving bed chromatography

Method used

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  • Method for separating boron isotopes by simulated moving bed chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Prepare boric acid aqueous solution

[0035] Take 3 g of boric acid solids with an electronic balance, put them in a beaker, add distilled water, and stir to dissolve; pour the solution into a 500ml volumetric flask, wash the beaker with distilled water for 3 times, pour the lotion into the volumetric flask, shake at a constant volume, and prepare 6g / L boric acid solution;

[0036] Step 2: Filter and remove impurities

[0037] Filter the boric acid solution with a 0.45 μm filter membrane to remove impurities in the solution, and then perform ultrasonic degassing on the filtered boric acid aqueous solution for 10 minutes to obtain the sample solution of the simulated moving bed. The simulated moving bed is composed of 8 chromatographic columns with a ratio of height to diameter of 10:1; the 8 chromatographic columns are divided into 4 zones, each zone is composed of 2 chromatographic columns; the chromatographic column filler is DIAN with an average particle siz...

Embodiment 2

[0041] Step 1: Prepare boric acid aqueous solution

[0042]Take 15g of boric acid solids with an electronic balance and place them in a beaker, add distilled water, and stir to dissolve; pour the solution into a 500ml volumetric flask, wash the beaker with distilled water for 3 times, pour the lotion into the volumetric flask, shake at a constant volume, and prepare 30g / L boric acid solution;

[0043] Step 2: Filter and remove impurities

[0044] Filter the boric acid solution with a 0.45 μm filter membrane to remove impurities in the solution, and then perform ultrasonic degassing on the filtered boric acid aqueous solution for 12 minutes to obtain the sample solution of the simulated moving bed. The simulated moving bed is composed of 8 chromatographic columns, the height-to-diameter ratio of the chromatographic columns is 10:1, and the 8 chromatographic columns are divided into 3 areas, of which the II area is composed of 4 chromatographic columns, and the I and III areas ...

Embodiment 3

[0048] Step 1: Prepare boric acid aqueous solution

[0049] Take 6 g of boric acid solids with an electronic balance, put them in a beaker, add distilled water, and stir to dissolve; pour the solution into a 500ml volumetric flask, wash the beaker twice with distilled water, pour the lotion into the volumetric flask, shake at a constant volume, and prepare 12g / L boric acid solution;

[0050] Step 2: Filter and remove impurities

[0051] Filter the boric acid solution with a 0.45 μm filter membrane to remove impurities in the solution, and then perform ultrasonic degassing on the filtered boric acid aqueous solution for 15 minutes to obtain the sample solution of the simulated moving bed. The simulated moving bed is composed of 12 chromatographic columns, which are divided into 4 areas, of which the II area is composed of 6 chromatographic columns, and the I, III, and IV areas are each composed of 2 chromatographic columns; the average particle size of the chromatographic colu...

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Abstract

The invention discloses a method for separating boron isotopes by simulated moving bed chromatography. The method is used to selectively separate isotopes 10B with high thermal-neutron-absorption cross section from boric acid by simulated moving bed chromatograph with a sassolite solution as a raw material, deionized water as a mobile phase, and weak-base anion-exchange resin as a stationary phase. The method comprises the following steps of: preparing a boric acid aqueous solution with certain concentration, filtering the boric acid aqueous solution for removing impurities to obtain a sampleinjection solution for a simulated moving bed, then loading samples by the simulated moving bed, collecting condensed boric acid rich in isotopes 10B at an extraction port, and then obtaining a target product by evaporation concentration. The method for separating the boron isotopes is continuous and has high separation efficiency.

Description

technical field [0001] The invention belongs to an isotope separation method, in particular to a method for separating stable boron isotopes by combining ion exchange chromatography and simulated moving bed technology. Background technique [0002] Boron (B) has two stable isotopes: 10 B and 11 b. in 10 B has a high thermal neutron absorption cross section (3837 target), and is a good reactor control material. However, isotopes in natural boron 10 The content of B is low, 19.78%, most of which are isotopes with a thermal neutron absorption cross section of only 0.005 target 11 b. Therefore, it is necessary to separate the two isotopes to obtain rich 10 B's enriched boron to enhance neutron absorption properties. If concentrated boric acid ( 10 B enriched boric acid, EBA), can reduce the concentration of boric acid in the coolant, reduce the discharge of radioactive waste, reduce the corrosion of the zirconium alloy cladding and the stress corrosion cracking of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D59/30C01B35/02
Inventor 王贯春付道贵王美玲刘晓珍简敏李刚邹从沛
Owner NUCLEAR POWER INSTITUTE OF CHINA
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