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A kind of preparation method and application of ion separation membrane

An ion separation, polyvinylidene fluoride technology

Active Publication Date: 2022-04-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the technical defects existing in the prior art, and provide a preparation method and application of an ion separation membrane. The ion separation membrane prepared by the method provided by the invention can solve the problem of low flow rate and low flow rate in the rubidium ion separation process. Low problem, improve separation efficiency

Method used

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  • A kind of preparation method and application of ion separation membrane
  • A kind of preparation method and application of ion separation membrane
  • A kind of preparation method and application of ion separation membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] S1. Preparation of mesoporous silicon:

[0029] Soak the prepared 0.2 g of ferric oxide in the mixture A composed of 80 mL of deionized water, 300 mL of ethanol and 12 mL of ammonia water, ultrasonically uniform, and stir rapidly for 4 h. During the stirring process, 20 mL of ethanol and 1.2 mL of tetraethyl orthosilicate mixed solution B was added dropwise to the above solution, sealed, centrifuged, washed, and dried to obtain ferric oxide coated with a layer of silicon balls, after 0.1 g silicon-coated Fe2O3 and 0.2 g cetyltrimethylammonium bromide were soaked in a mixture A consisting of 50 mL deionized water, 65 mL ethanol and 1 mL ammonia water, ultrasonically uniformed, and stirred rapidly for 8 h. During the stirring process, the mixed solution B composed of 20 mL ethanol and 0.13 mL ethyl orthosilicate was added dropwise to the above solution, sealed, centrifuged, washed, dried, and calcined at 550 °C for 4 h to obtain mesoporous silicon .

[0030] S2. Prepara...

Embodiment 2

[0041] S1. Preparation of mesoporous silicon:

[0042] First, soak the prepared 0.2 g of ferric oxide in the mixture A composed of 80 mL of deionized water, 300 mL of ethanol and 12 mL of ammonia water, ultrasonically uniform, and stir rapidly for 6 h. During the stirring process, 20 Mixed solution B consisting of 1 mL ethanol and 1.2 mL ethyl tetrasilicate was added dropwise to the above solution, sealed, centrifuged, washed, and dried to obtain ferric oxide coated with a layer of silicon balls, and 0.1 g of Diferric oxide and 0.2 g cetyltrimethylammonium bromide after silicon were soaked in a mixture A consisting of 50 mL deionized water, 65 mL ethanol and 1 mL ammonia water, ultrasonically uniformed, and stirred rapidly for 6 h. During the stirring process, the mixed solution B composed of 20 mL ethanol and 0.13 mL tetraethyl orthosilicate was added dropwise to the above solution, sealed, centrifuged, washed, dried, and calcined at 450 ° C for 6 hours to obtain mesoporous s...

Embodiment 3

[0052] S1. Preparation of mesoporous silicon:

[0053] Soak the prepared 0.2 g of ferric oxide in the mixture A composed of 80 mL of deionized water, 300 mL of ethanol and 12 mL of ammonia water, ultrasonically uniform, and stir rapidly for 4 h. During the stirring process, 20 mL of ethanol and 1.2 mL of tetraethyl orthosilicate mixed solution B was added dropwise to the above solution, sealed, centrifuged, washed, and dried to obtain ferric oxide coated with a layer of silicon balls, after 0.1 g silicon-coated Soak Fe2O3 and 0.2 g cetyltrimethylammonium bromide in a mixture A consisting of 50 mL deionized water, 65 mL ethanol and 1 mL ammonia water, ultrasonically homogenize, and stir rapidly for 4 h. During the stirring process, the mixed solution B composed of 20 mL ethanol and 0.13 mL ethyl orthosilicate was added dropwise to the above solution, sealed, centrifuged, washed, dried, and calcined at 650 °C for 3 hours to obtain mesoporous silicon.

[0054] S2, the preparatio...

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Abstract

The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method and application of an ion separation membrane. Specifically refers to polyvinylidene fluoride blended graphene oxide as the base membrane, mesoporous silicon and 18‑crown‑6‑ether as the adsorbent, rubidium ions as template ions, fixed on the base membrane by the delayed phase inversion method, combined with the membrane Separation technology, preparation of ion separation membrane. The selective adsorption experiment is used to study the selective adsorption capacity of the prepared ion separation membrane; the selective permeation experiment is used to study the selective permeation ability of the prepared ion separation membrane to target rubidium ions and non-target substances; the results show that using The ion separation membrane prepared by the invention has high specific recognition ability and adsorption and separation ability for rubidium ions.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a preparation method and application of an ion separation membrane. Background technique [0002] Rubidium has great economic and military benefits, and has been widely used in environmental science, defense industry, aerospace industry, and energy fields, and the demand is increasing day by day. Rubidium ions exist in salt lake brines along with other alkali metals, such as calcium (Ca), magnesium (Mg) and cesium (Cs). The existing traditional methods for separating alkali metal ions from salt lake brine are mainly solvent extraction, evaporation and precipitation; however, the traditional methods have problems of low recovery, low separation efficiency and poor selectivity. Therefore, it is crucial to find an efficient method to selectively separate rubidium. Contents of the invention [0003] The purpose of the present invention is t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCB01J20/261B01J20/22B01J20/20C02F1/288
Inventor 于超卢健吴易霖闫永胜李春香
Owner JIANGSU UNIV
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