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A kind of effective separation method of lithium isotope

A technology of lithium isotope and separation method, applied in the field of effective separation of lithium isotope, can solve the problems of ineffective separation method and high separation cost, and achieve the effects of high efficiency, high crown ether loading rate and strong practicability

Active Publication Date: 2018-05-11
江西宏信锂业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, various separation methods are not very effective, and the separation cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] An effective separation method for lithium isotopes, comprising the following steps:

[0027] (1) Dissolving 4-aminobenzo-12-crown-4 in DMF to obtain a solution;

[0028] (2) Weigh the SBA-15 precursor and catalyst A, mix and grind the two evenly, then mix with the solution prepared in step (1), and add triethylamine, stir evenly, blow nitrogen for 5min, and then 80°C React under oil bath conditions for 24 hours, after the reaction, cool to room temperature, and suction filter to obtain a solid; wherein, the catalyst A is a mixture of carbonate and iodide, and the mass ratio of the two is 2.5:1;

[0029] (3) Add absolute ethanol to the solid obtained in step (2), repeatedly ultrasonically wash and centrifuge until the centrifuged supernatant is neutral, and vacuum-dry the centrifuged solid at 40-50° C. for 18 hours, The crown ether functionalized SBA-15 ordered mesoporous silicon-based material was obtained; the dosage ratio of SBA-15 precursor, 4-aminobenzo-12-crown-4...

Embodiment 2

[0032] An effective separation method for lithium isotopes, comprising the following steps:

[0033] (1) Dissolving 4-aminobenzo-15-crown-5 in THF to obtain a solution;

[0034] (2) Weigh the SBA-15 precursor and catalyst A, mix and grind the two evenly, then mix with the solution prepared in step (1), and add triethylamine, stir evenly, blow nitrogen for 10min, and then 100°C React under oil bath conditions for 18 hours, after the reaction, cool to room temperature, and suction filter to obtain a solid; wherein, the catalyst A is a mixture of carbonate and iodide, and the mass ratio of the two is 5:1;

[0035] (3) Add absolute ethanol to the solid obtained in step (2), repeatedly ultrasonically wash and centrifuge until the centrifuged supernatant is neutral, and vacuum-dry the centrifuged solid at 40-50° C. for 24 hours, The crown ether functionalized SBA-15 ordered mesoporous silicon-based material was obtained; the dosage ratio of SBA-15 precursor, 4-aminobenzo-15-crown-5...

Embodiment 3

[0038] An effective separation method for lithium isotopes, comprising the following steps:

[0039] (1) Dissolving 4-aminobenzo-18-crown-6 in DMF to obtain a solution;

[0040] (2) Weigh the SBA-15 precursor and catalyst A, mix and grind the two evenly, then mix with the solution prepared in step (1), add triethylamine, stir evenly, pass nitrogen gas for 6min, and then 85°C Reaction under oil bath conditions for 20h, after the reaction, cooled to room temperature, and suction filtration to obtain a solid; wherein, the catalyst A is a mixture of carbonate and iodide, and the mass ratio of the two is 3:1;

[0041] (3) Add absolute ethanol to the solid obtained in step (2), repeatedly ultrasonically wash and centrifuge until the centrifuged supernatant is neutral, and vacuum-dry the centrifuged solid at 40-50° C. for 20 h, The crown ether functionalized SBA-15 ordered mesoporous silicon-based material was obtained; the dosage ratio of SBA-15 precursor, 4-aminobenzo-18-crown-6, ...

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PUM

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Abstract

The invention discloses an effective separation method of lithium isotopes. The method comprises the steps as follows: an extraction chromatographic column is prepared by filling a chromatographic column with a crown ether functional SBA-15 ordered mesoporous silicon-based material, a lithium sulfocyanide aqueous solution serving as leacheate is injected into the extraction chromatographic column by a high-pressure constant flow pump, so that the lithium isotopes are adsorbed, exchanged and desorbed in the extraction chromatographic column, and lithium isotopes with different abundances can be obtained according to the sequence of flowing of the leacheate out of the extraction chromatographic column, in the crown ether functional SBA-15 ordered mesoporous silicon-based material, a side chain of crown ether contains an amino group, the aperture of SBA-15 is larger than 6 nm, the length of a channel is smaller than 1.5 mu m, and the surface contains a chlorine substituted alkyl group. The method is low in cost, simple to operate and high in separation efficiency.

Description

Technical field: [0001] The invention relates to lithium isotope separation technology, in particular to an effective separation method for lithium isotope. 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 oil, 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 all over the world actively develop new and renewable energy including nucl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D59/26
CPCB01D59/26
Inventor 李风浪李舒歆
Owner 江西宏信锂业有限公司