Lithium isotope separation method and single-stage separation factor measurement method thereof

A lithium isotope and separation method technology, which is applied in the field of lithium isotope separation method and its single-stage separation coefficient determination, can solve problems such as human and environmental hazards, and achieve the effects of avoiding pollution, complete separation, and simple separation process

Active Publication Date: 2014-04-23
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the process of realizing the present invention, the inventors have found that there are at least the following problems in the prior

Method used

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  • Lithium isotope separation method and single-stage separation factor measurement method thereof
  • Lithium isotope separation method and single-stage separation factor measurement method thereof
  • Lithium isotope separation method and single-stage separation factor measurement method thereof

Examples

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Embodiment 1

[0034]A three-electrode electrolysis system is adopted, and a working electrode, an auxiliary electrode and a reference electrode are arranged in the electrolytic cell, wherein the working electrode is a graphite sheet, and the electrolyte solution is a lithium acetate-dimethylsulfoxide solution of 0.075mol / L, comprising the following steps:

[0035] (1) Redox reaction

[0036] A graphite sheet with a thickness of 0.2mm is used as the working electrode (WE), a Pt sheet electrode is used as the auxiliary electrode (CE), and a saturated calomel electrode is used as the reference electrode (RE). The electrolyte solution has a concentration of 0.05mol / L Lithium acetate-dimethylsulfoxide (LiCH 3 COO-DMSO) solution. The electrolysis conditions are: first perform electrolysis in the constant current mode with a current size of -0.8mA, and when the voltage of the working electrode to the reference electrode drops to a stable voltage of -3.0V, the electrolysis mode is converted to a c...

Embodiment 2

[0046] The same as the principle and method in Example 1, the difference is that the parameters change, and the following parameters in Example 1 in Example 1 are still implemented after the implementation, as shown in the following table:

[0047]

[0048] In the above-mentioned embodiment, the electrolytic system of graphite flake working electrode and lithium acetate-dimethyl sulfoxide electrolyte is used to realize the separation of lithium isotopes in the non-mercury system, and the single-stage separation coefficient reaches more than 1.02, which can reach the industrial level. Requirements for single-stage separation coefficients for lithium isotope separation. And the reaction in the embodiment is an exchange reaction between lithium isotopes in different valence states, which is very beneficial to obtain a higher single-stage separation coefficient. In addition, since there is no complicated chemical reaction in the embodiment, and the reaction is a solid-liquid tw...

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Abstract

The invention belongs to the technical field of isotope separation, and in particular to a lithium isotope separation method and a single-stage separation factor measurement method thereof. According to the method, lithium isotope separation is realized by utilizing a graphite-organic electrolyte system; the method comprises three steps of oxidation-reduction reaction, isotope exchange reaction and lithium isotope separation. By the method, lithium isotope separation in a non-mercury system is realized; the pollution to an environment and the harm to human health caused by metallic mercury are avoided; the method is easy to operate; moreover, the single-stage separation factor reaches over 1.02, the separation efficiency is high, and the requirement on a single-stage separation factor of lithium isotope separation in industry can be met.

Description

technical field [0001] The invention belongs to the technical field of isotope separation, and in particular relates to a lithium isotope separation method and a single-stage separation coefficient determination method thereof. Background technique [0002] With the growth of the world's population and the rapid development of the economy, people's demand for energy is also expanding rapidly. Currently, 85% of the energy used in the world comes from non-renewable oil, natural gas and coal. The global oil crisis is becoming more and more serious, and the reserves of oil can only be used by humans for about 40 years. In addition, fossil raw materials such as petroleum, natural gas and coal are also direct raw materials for many industrial products. Using them as fuel is not only a great waste of resources, but also seriously pollutes the environment on which human beings depend. The potential crisis of energy and the deterioration of the ecological environment make countries...

Claims

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Application Information

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IPC IPC(8): B01D59/40G01N27/62
Inventor 吴继宗孙秉怡杨恩波郑维明
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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