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Novel rubidium-potassium separating extracting agent and separating method

An extraction and solvent oil technology, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of high price and low single-stage extraction rate

Inactive Publication Date: 2014-06-25
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the extraction agent is expensive, and it needs to complete the extraction and separation of rubidium at a relatively high alkalinity (1mol / L NaOH). The single-stage extraction rate is not high, and the separation coefficient β of rubidium and potassium can only reach about 15.

Method used

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  • Novel rubidium-potassium separating extracting agent and separating method
  • Novel rubidium-potassium separating extracting agent and separating method
  • Novel rubidium-potassium separating extracting agent and separating method

Examples

Experimental program
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Effect test

example 1

[0008] At 20°C, Rb in the brine feed solution + =100mg / L, K + =1g / L. Use 4-methyl-2-(α-methylbenzyl)phenol as the extractant, D60 solvent oil as the diluent, the concentration of the extractant is 0.5mol / L, extract the organic phase:water phase (O / A)=3:1 , the alkalinity of the feed liquid is controlled to be 0.20 mol / L sodium hydroxide concentration, the extraction time is 2 minutes, the extraction rate of rubidium after primary extraction is 87.08%, the extraction rate of potassium is 9.38%, and the separation coefficient of rubidium and potassium is 41.40. The organic phase loaded with rubidium is back-extracted with 1.5mol / L hydrochloric acid solution. Compared with O / A=5:1, the stripping rate of rubidium reaches 85%, and the stripping rate of potassium is greater than 95%. The concentrations of rubidium and potassium in the medium are Rb + =123.36mg / L, K + =148.67mg / L. After one extraction and stripping, the recovery rate of rubidium was 74.02%.

example 2

[0010] At 20°C, Rb in the brine feed solution + =1g / L, K + =10g / L. Use D80 solvent oil as the diluent, 4-methyl-2-(α-methylbenzyl)phenol as the extractant, the concentration of the extractant is 0.6 mol / L, the extraction ratio O / A=2.5:1, the concentration of sodium hydroxide 0.20 mol / L, extraction for 2 minutes: the single-stage extraction rate of rubidium is 86%, the extraction rate of potassium is 9.71%, and the separation coefficient of rubidium and potassium is 33.45. Then the organic phase loaded with rubidium is back-extracted with 2.0mol / L hydrochloric acid solution. Compared with O / A=5:1, the stripping rate of rubidium reaches 85%. The concentration of rubidium and potassium in the stripping solution is Rb + =1.34g / L,K + =1.86g / L.

example 3

[0012] At 20°C, Rb in the brine feed solution + =6g / L,K + =60g / L. Use D100 solvent oil as the diluent, 4-methyl-2-(α-methylbenzyl)phenol as the extractant, the concentration of the extractant is 1.0 mol / L, the extraction phase O / A=3:1, the concentration of sodium hydroxide 0.30 mol / L, extracted for two minutes, after primary extraction: the extraction rate of rubidium was 85.68%, the extraction rate of potassium was 15.79%, and the separation coefficient of rubidium and potassium was 31.92. Then the organic phase loaded with rubidium is back-extracted with 3.0mol / L hydrochloric acid solution. Compared with O / A=5:1, the stripping rate of rubidium reaches 85%. The concentration of rubidium and potassium in the stripping solution is Rb + =7.30g / L,K + =15.01g / L.

[0013] process such as image 3 shown.

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Abstract

The invention relates to a novel rubidium-potassium separating extracting agent 4-methyl-2-(alpha-methylbenzyl) phenol and a rubidium-potassium separating method. 4-methyl-2-(alpha-methylbenzyl) phenol is taken as the extracting agent, and solvent oil such as D60, and the like, is taken as a diluent for extracting and separating rubidium in alkalescent high-potassium brine, wherein single-stage extraction rate of the rubidium can be over 85%, a rubidium-potassium separating coefficient can be over 30; enriched liquor obtained by reversely extracting an organic phase loaded with rubidium through acid liquor can be evaporated and concentrated to prepare rubidium salt products such as RuCl, RuNO3, and the like. Compared with the normal rubidium extracting agent 4-tertiary butyl-2-(alpha-methylbenzyl) phenol, the novel extracting agent 4-methyl-2-(alpha-methylbenzyl) phenol has the advantages of being high in separating efficiency, simple in synthetic method, low in price, mild in extracting condition, and the like. The extracting agent is applicable to underground brine, salt lake brine and solid ore-decomposed rubidium-containing liquor.

Description

technical field [0001] As a rare metal, rubidium has special uses in high-tech fields. It can be used to make night vision devices, photoelectric conversion materials, organic synthesis catalysts, lasers, and anticancer drugs. In nature, rubidium often coexists with other metals in lepidolite, cesium garnet, natural carnallite, cesium garnet, salt lake brine and underground brine. It is reported that more than 92% of rubidium resources exist in liquid mineral resources such as salt lake brine and underground brine, especially in my country's Sichuan Basin, Jianghan Basin underground brine and Xinjiang Salt Lake brine with a rubidium content of more than 30mg / L, which is an important resource of rubidium. However, due to the coexistence of rubidium and a large amount of alkali metal elements potassium and sodium with very similar properties, it is extremely difficult to extract rubidium in brine, resulting in a large amount of rubidium resources in brine not being rationally ut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B59/00C22B26/10C07C39/15C07C37/14
CPCY02P10/20
Inventor 安莲英黄正根
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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