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Impregnating resin with ionic liquid film containing extractive agent on surface, producing method and application thereof

A technique for impregnating resins and ionic liquids, applied in solvent extraction, separation methods, chemical instruments and methods, etc., can solve the problems of unsuitable ionic liquid-based extraction process, high viscosity of imidazole-based ionic liquids, entrainment and loss of ionic liquids, etc., to achieve Improve the separation effect, increase the extraction capacity, and reduce the cost

Inactive Publication Date: 2008-10-01
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, in the traditional extraction and separation process, adjusting the acidity of the aqueous phase is a common method to optimize the separation conditions, but combined with the characteristics of ionic liquids, this method is no longer suitable for the needs of ionic liquid-based extraction processes
Second, compared with organic solvents, imidazole-based ionic liquids have higher viscosity, which is also a disadvantage for extraction.
In the extraction process, it will cause problems such as low mass transfer efficiency, long equilibration time, difficult phase separation and entrained loss of ionic liquid.

Method used

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  • Impregnating resin with ionic liquid film containing extractive agent on surface, producing method and application thereof
  • Impregnating resin with ionic liquid film containing extractive agent on surface, producing method and application thereof
  • Impregnating resin with ionic liquid film containing extractive agent on surface, producing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of IL-SIR

[0039] The XAD-7 resin was washed with ethanol three times to remove the impurities contained in the resin. After filtration, the resin was placed in a vacuum drying oven and dried at 50°C to remove all the remaining ethanol. Take 2 g of XAD-7 resin and soak it in 10 ml of [C 8 mim][PF 6 ], stirring at 30°C for 24 hours. Use filter paper to absorb excess ionic liquid, and then wash with water 10 times until the resin is granular. Use filter paper to absorb excess water and dry at 40°C for 12 hours to obtain IL-SIR.

Embodiment 2

[0040] Example 2: Preparation of IL-SIR

[0041] The XAD-7 resin was washed with ethanol three times to remove the impurities contained in the resin. After filtration, the resin was placed in a vacuum drying oven and dried at 50°C to remove all the remaining ethanol. Take 3.5 g of XAD-7 resin and soak it in 18 ml of [C 8 mim][PF 6 ], stirring at 40°C for 24 hours. Use filter paper to absorb excess ionic liquid, and then wash with water about 10 times until the resin is granular. Use filter paper to absorb excess water and dry at 40°C for 24 hours to obtain IL-SIR.

Embodiment 3

[0042] Example 3: Preparation of IL-SIR

[0043] Wash the XAD-7 resin with an equal volume of ethanol 3 times to remove the impurities contained in the resin. After filtration, the resin is placed in a vacuum drying oven and dried at 70°C for 16 hours to remove all the remaining ethanol. Take 10 g of XAD-7 resin and soak it in 50 ml of [C 8 mim][PF 6 ], stirring at 50°C for 24 hours. Use filter paper to absorb excess ionic liquid, and then wash with water about 10 times until the resin is granular. Use filter paper to absorb excess water and dry at 60°C for 24 hours to obtain IL-SIR.

[0044] by figure 1 It can be seen that the surface morphology of XAD-7 resin before and after impregnation has changed significantly, and the surface of IL-SIR obtained by impregnation is obviously affected by Cyanex923-containing [C 8 mim][PF 6 ] Covered by.

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Abstract

The invention relates to a dipping resin with the surface covered by an ionic liquid film containing extractant, and a fabrication method as well as application thereof. The ionic liquid containing the extractant is fixed in adsorption resin XAD-7; acid or alcohol or heat is not required to be added by using a direct dipping method, the stability of the ionic liquid is hardly affected, and the loading of ionic liquid matrix system in the material is large. Solid-liquid extraction is carried out by using the dipping resin, therefore, the contact area of ion liquid phase and water phase can be effectively increased, the mass transfer efficiency of the system can be improved, clamp strap loss of the ionic liquid can be reduced, and the phenomena of emulsion, phase splitting, etc. in the extraction process can be improved. In an extraction restriction complexation method, complexation agent is added in the water phase, and the extraction efficiency of the ionic liquid phase on the target metallic ions and selection among different metallic ions are improved by the difference of stability constants between the complexation agent and the metallic ions, thus effectively avoiding the phenomena of extraction efficiency reduction and ionic liquid decomposition in the separation process by adjusting the pH value. The two methods can be combined to be applied to imetallic ion separation with excellent separation effect.

Description

Technical field [0001] The invention relates to an impregnating resin (IL-SIR) whose surface is covered by an ionic liquid film containing an extractant, and a preparation method and application thereof. technical background [0002] Ionic liquid (IL) refers to an organic ionic compound that is liquid at room temperature or close to room temperature and consists of both anions and cations. Ionic liquid-based extraction refers to the application of IL as a diluent to the extraction phase, and it is an emerging green separation technology. At present, in the research of ionic liquid-based system for extracting metal ions, its green and high-efficiency characteristics have attracted people's attention. As a new type of green solvent, ionic liquid has a series of characteristics different from traditional volatile organic solvents, such as wide liquid temperature range, strong solubility, almost no measurable vapor pressure, high stability, and good conductivity. Due to its non-volat...

Claims

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Application Information

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IPC IPC(8): B01D11/00
Inventor 陈继孙晓琦彭波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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