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Method for separating and purifying boron-10 and boron-11

A technology of boric acid and ionized water, which is applied in the field of separation and purification of boron-10 and boron-11, can solve the problems of increasing production costs, taking a long time, and long chromatographic columns, and achieves increasing single-stage separation factors and rich The effect of fast settling speed and enhanced separation ability

Inactive Publication Date: 2019-08-20
天津纯态化学工程技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Compared with the chemical distillation method, the separation of boron isotopes by the ion exchange resin method should achieve more than 85% efficiency. 10 B abundance, often requiring very long columns, takes a considerable amount of time, substantially increasing production into wood

Method used

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  • Method for separating and purifying boron-10 and boron-11
  • Method for separating and purifying boron-10 and boron-11

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh the boric acid solid and dissolve it in pure water to prepare a boric acid aqueous solution containing a boron isotope concentration of 0.5mol / L, adjust the pH value to 4 with hydrochloric acid; add 1.0g / L mannitol to the boric acid aqueous solution, and then use a filter membrane Filter to remove impurities in the solution, and then degas it with ultrasound for 15 minutes to obtain the sample solution of the simulated moving bed;

[0029] Amberlite IRA 743 resin, soak Amberlite IRA 743 resin with deionized water for 24 hours, then wash with 5 times the volume of 0.1mol / L hydrochloric acid, treat the resin as a chlorine-type resin, and then wash with deionized water until neutral, and at least Stable for 8 hours without changing, so as to achieve the activation effect;

[0030] The activated Amberlite IRA 743 resin was packed in 25 chromatographic columns in the four zones of the simulated moving bed by wet packing method. %, positive pressure recoil method is us...

Embodiment 2

[0039] Compared with Example 1, the chromatographic column filling resin uses Diaion CRB 02 resin, the eluent uses nitric acid aqueous solution, and the operating temperature is 30 ° C, and other conditions are the same as in Example 1.

Embodiment 3

[0041] Compared with Example 1, Zone I and Zone III are each composed of two ZXC 700 resin columns, Zone II is composed of 20 Amberlite IRA743 resin columns, Zone IV is composed of one D 564 resin column, and the eluent First use sulfuric acid aqueous solution, then use hydrochloric acid aqueous solution, the operating temperature is 28°C, other conditions are the same as in Example 1.

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Abstract

The invention discloses a method for separating and purifying boron-10 and boron-11, belonging to the technical field of separation and preparation of isotopes. The method comprises the following three steps: the preparation of sample introduction liquid for a simulated moving bed; pretreatment of an ion exchange chromatographic column; and sample introduction and gradient elution. According to the method, the enrichment rate of <10>B can be increased to about 95% compared with a natural enrichment of 20%, and the speed of enrichment is fast; a simulated moving bed chromatographic separation system is used, so a long chromatographic column is not needed in the entire separation process, thereby reducing production cost; and gradient elution is utilized, so the purposes of reducing band migration distance and shortening separation period are achieved.

Description

technical field [0001] The invention relates to the technical field of isotope separation and preparation, in particular to a method for the separation and purification of boron-10 and boron-11. Background technique [0002] There are two stable isotopes of boron in nature 10 B and 11 B, whose natural abundances are 19.9% ​​and 80.1%, respectively. 10 The thermal neutron capture cross section of B is much larger than 11 B, so in the nuclear industry 10 B is widely used in the manufacture of thermal neutron counter tubes, reactor control rods and thermal neutron shielding materials, and is used in medicine to treat glioma and melanoma. However, in these cases, it is required 10 The abundance of B reaches more than 85%, or even higher, how to 10 B is isolated from natural boron to obtain a high concentration of 10 B product, is the world's 10 B is a common concern of manufacturers and technicians. [0003] Existing boron isotope separation methods include: BF 3 Low t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B35/10B01D59/30B01D59/26
CPCB01D59/26B01D59/30C01B35/109
Inventor 张爱晶刘天弘
Owner 天津纯态化学工程技术有限公司
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