Method of extracting lithium isotope <6>Li with centrifugal extraction machine

A centrifugal extractor and a technology for extracting lithium, which are applied to the separation of different isotopic elements, separation methods, chemical instruments and methods, etc., can solve the problems of high cost, small separation coefficient, and low processing capacity, and achieve improved corrosion resistance. Strong corrosion resistance and compact structure

Active Publication Date: 2017-08-29
ZHENGZHOU TIANYI EXTRACTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of the invention is to provide a kind of application centrifugal extractor to extract lithium isotope for the deficiencies in the pr

Method used

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  • Method of extracting lithium isotope &lt;6&gt;Li with centrifugal extraction machine
  • Method of extracting lithium isotope &lt;6&gt;Li with centrifugal extraction machine
  • Method of extracting lithium isotope &lt;6&gt;Li with centrifugal extraction machine

Examples

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Example Embodiment

[0045] Example 1

[0046] An application of centrifugal extractor to extract lithium isotopes 6 Li's method includes the following steps:

[0047] (1) Extraction section: Mix the lithium hydroxide aqueous solution and the extractant with a volume ratio of 1:1 and add them to the centrifugal extractor for extraction; normal temperature, 5-stage countercurrent extraction; the extractant is tributyl phosphate and kerosene, which The volume ratio is tributyl phosphate / kerosene = 1:2;

[0048] (2) Alkaline washing section: Add the organic phase obtained in step 1) to a centrifugal extractor for alkaline washing, at room temperature, 2-3 stage countercurrent extraction; the volume of the organic phase and the lye is 1:1; The lye is a sodium hydroxide solution with a mass concentration of 20%;

[0049] (3) Stripping section: stripping the organic phase obtained in step 2) in the centrifugal extractor, at room temperature, 4-5 stage countercurrent stripping; the volume of the organic phase a...

Example Embodiment

[0052] Example 2

[0053] An application of centrifugal extractor to extract lithium isotopes 6 Li's method includes the following steps:

[0054] (1) Extraction section: The lithium hydroxide aqueous solution and the extractant are mixed into a centrifugal extractor at a volume ratio of 1:6 for extraction; normal temperature, 6-stage countercurrent extraction; the extractant is tributyl phosphate and kerosene, which The volume ratio is tributyl phosphate / kerosene=1:4;

[0055] (2) Alkaline washing section: Add the organic phase obtained in step 1) to the centrifugal extractor for alkaline washing, normal temperature, 3-stage countercurrent extraction; the volume ratio of the organic phase and the lye is 3:1; The solution is sodium hydroxide solution with a mass concentration of 30%;

[0056] (3) Stripping section: stripping the organic phase obtained in step 2) in the centrifugal extractor, at room temperature, 4-5 stages countercurrent stripping; the volume ratio of the organic pha...

Example Embodiment

[0058] Example 3

[0059] An application of centrifugal extractor to extract lithium isotopes 6 Li's method includes the following steps:

[0060] (1) Extraction section: Mix the lithium hydroxide aqueous solution and the extractant with a volume ratio of 1:5 and add them to the centrifugal extractor for extraction; normal temperature, 5-stage countercurrent extraction; the extractant is tributyl phosphate and kerosene, which The volume ratio is tributyl phosphate / kerosene = 1:3;

[0061] (2) Alkaline washing section: Add the organic phase obtained in step 1) to a centrifugal extractor for alkaline washing, normal temperature, 3-stage countercurrent extraction; the volume ratio of the organic phase to the lye is 2:1; the alkali The solution is sodium hydroxide solution with a mass concentration of 25%;

[0062] (3) Stripping section: stripping the organic phase obtained in step 2) in the centrifugal extractor, room temperature, 4-stage countercurrent stripping; the volume ratio of th...

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Abstract

The invention discloses a method of extracting lithium isotope <6>Li with a centrifugal extraction machine. A device includes an extraction section, an alkali washing section, and a back extraction section. The lithium isotope extraction device in the invention is a novel and high-effective centrifugal extraction device, when the device is combined with a technology of extracting the lithium isotope through a solvent extraction method, stage efficiency and separation effect are greatly improved, the number of extraction stages is reduced, processing load is increased, and recovery rate of an extraction agent is increased. The method solves the problems of high cost, low processing load and difficulty in separation in the prior art, and has excellent market application prospect.

Description

technical field [0001] The present invention relates to a lithium isotope 6 The extraction method of Li, especially relates to a kind of extraction lithium isotope of application centrifugal extractor 6 Li's method. Background technique [0002] Lithium is the lightest metal in nature, and it exists in two stable isotopes namely 6 Li and 7 The relative abundance of Li is 6 Li is 7.53%, 7 Li is 92.47%. In the nuclear energy industry, 6 Li and 7 Li has different nuclear reaction properties and plays an important role in nuclear materials. Therefore, their separation has always been an important research topic. [0003] At present, there are many separation methods of lithium isotopes, which can be roughly divided into chemical methods and physical methods. Chemical methods include lithium amalgam method, solvent extraction, ion exchange chromatography, fractional precipitation and fractional crystallization, etc. Physical methods include electromagnetic methods, mol...

Claims

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Application Information

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IPC IPC(8): B01D59/24B01D59/20
CPCB01D59/20B01D59/24
Inventor 王利军
Owner ZHENGZHOU TIANYI EXTRACTION TECH
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