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Selective absorbing material as well as preparation method and application thereof

An absorbing material and selective technology, applied in the application field of polymer materials, can solve the problems of difficult desorption, complicated regeneration of adsorbents, and small adsorption capacity, and achieve the effects of simple preparation method, fast absorption rate and large absorption capacity.

Inactive Publication Date: 2021-09-17
EAST CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, some commonly used adsorbents at present, such as molecular sieves, silica gel, activated carbon, activated alumina, etc., have problems such as small adsorption capacity, difficult desorption, and complex regeneration of adsorbents.

Method used

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  • Selective absorbing material as well as preparation method and application thereof
  • Selective absorbing material as well as preparation method and application thereof
  • Selective absorbing material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Preparation of Selectively Absorbent Material A

[0025] 1.58 g of 1-vinyl-3-(3-sulfopropyl) imidazolium internal salt, 0.50 g of sodium p-styrenesulfonate and 0.12 g of 3,3'-(triethylene glycol) bis(1 -vinyl-3-imidazolium) dibromide was dissolved in 5 milliliters of deionized water, added to a 50 milliliter two-necked flask, under nitrogen protection, the temperature was raised to 80 ° C, and 0.11 gram of initiator AIBN was added immediately, and then continued to stir for 24 Hour. After the reaction, the obtained cross-linked polymer was dispersed in a 1 mol / L sulfuric acid aqueous solution, and stirred at room temperature for 24 hours. After stirring, it was washed several times with deionized water, methanol and acetone, and dried under vacuum at 60° C. for 24 hours to obtain the target selective absorption material, which was named A, and the yield reached 86%.

Embodiment 2

[0026] Example 2: Absorption capacity test of selective absorbent material A in a single solvent

[0027] About 50 mg of dry selective absorbent material A was added to a sealed bottle containing 10 ml of solvent. Allow selective absorption material A to fully absorb by standing at room temperature for 24 hours. The selective absorbent material A, which has fully absorbed the solvent, is separated from the sealed bottle, the surface absorbed solvent is sucked off with filter paper, and it is weighed immediately. The absorption capacity of selective absorbent material A in a single solvent is calculated by the following equation:

[0028]

[0029] Among them, m 干 Indicates the mass of dry selective absorbent material A; m 吸 Indicates the mass of the selective absorbing material A after fully absorbing the solvent.

[0030] The absorption capacity of selective absorbent material A in different solvents is shown in Table 1.

[0031] Table 1 The absorption capacity of sele...

Embodiment 3

[0034] Example 3: Absorption Rate Test of Selective Absorbent Material A in Water and Formamide

[0035] In the present embodiment, the absorption capacity Q of selective absorbent material A to water and formamide, i.e. the absorption rate, is measured at different times; see figure 1 . figure 1 The results show that the selective absorbent material A can reach a fully absorbed state in water and formamide in only 5 minutes and 15 minutes. This indicates that the as-prepared selective absorbent material A has the ability to rapidly absorb solvent.

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PUM

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Abstract

The invention relates to a selective absorbing material as well as a preparation method and application thereof, and the selective absorbing material is a cross-linked polymer prepared by taking vinyl imidazolium ionic liquid, polymerizable sodium salt and a cross-linking agent as raw materials through free radical polymerization and post-treatment. In a selective absorption test of a mixed solvent, the cross-linked polymer disclosed by the invention has the advantages of high absorption rate, large absorption capacity, high selectivity and the like. In a series of water / solvent mixed solvent systems, the cross-linked polymer absorbs water with high selectivity, and the mole percentage content of water in the absorbed mixed solvent can reach 97.6% at most. The cross-linked polymer disclosed by the invention is simple in preparation process and stable in structure, can be recycled for multiple times, and is an excellent selective absorption material.

Description

technical field [0001] The invention belongs to the technical field of polymer material application, and in particular relates to a selective absorption material and its preparation method and application. Background technique [0002] Methanol, ethanol and THF are very important chemical basic raw materials and organic solvents. In the chemical production process, a large amount of mixed waste liquid containing methanol / ethanol / THF and water is often produced (Journal of Chemical & Engineering Data, 2012, 57, 3309-3314). In the contemporary society where environmental protection is increasingly urgent and resources are tight, if the water and organic solvents in these mixed waste liquids can be separated and recovered simply and effectively, both environmental protection and resource utilization of waste can be realized. Therefore it is of great significance. [0003] Methanol / ethanol / THF and water are in a homogeneous azeotrope state at room temperature, so their separat...

Claims

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Application Information

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IPC IPC(8): C08F226/06C08F228/02B01D15/20B01J20/26
CPCC08F226/06B01J20/262B01D15/20C08F228/02Y02P20/54
Inventor 高国华陈必华王蔓王鑫张永亚
Owner EAST CHINA NORMAL UNIVERSITY
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