Method for preparing modified supported liquid membrane

A technology for supporting liquid membranes and supporting membranes, applied in chemical instruments and methods, membrane technology, semipermeable membrane separation, etc., can solve problems such as the stability of supporting liquid membranes, obstacles, etc., to improve anti-pollution ability, increase selectivity, enhance the effect of the interaction

Inactive Publication Date: 2012-09-26
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing liquid membranes include supported liquid membranes, emulsified liquid membranes, and bulk liquid membranes. Due to the advantages of good selectivity, fast mass transfer rate, high separation efficiency and energy saving, supported liquid membranes also have the function of biofilm concentration and enrichment. Therefore, its research is very active, and it has been widely studied in the aspects of material separation, hydrometallurgy, petrochemical industry, industrial wastewater treatment and food hygiene. However, in the process of promoting the industrial application of liquid membranes, the stability of supporting liquid membranes still remains is the main obstacle

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  • Method for preparing modified supported liquid membrane
  • Method for preparing modified supported liquid membrane
  • Method for preparing modified supported liquid membrane

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0022] Embodiment 1, a kind of preparation method of modified support liquid membrane, concrete steps comprise:

[0023] Step 1, activate the support membrane: place the polyvinylidene fluoride membrane in 3mol / L sulfuric acid for surface soaking treatment, then wash it with deionized water, and dry it for later use.

[0024] Step 2, (1) Synthesis of ionic liquid: Mix n-butane bromide and N-methylimidazole at a ratio of 1.2:1 at room temperature, and reflux the mixture at 70° C. for 24 h. After the reaction, the reaction solution was cooled to room temperature, washed with ethyl acetate, and then placed in a constant temperature electric drying oven to dry to constant weight to obtain brominated 1-butyl-3-methylimidazole. Weigh 16.3gNH 4 PF 6 Dissolve in 100 mL of deionized water, add an equimolar amount of 1-butyl-3-methylimidazole bromide, and stir in a water bath at 30°C for 6 h. After the reaction is over, let it stand for stratification, wash the lower layer with deion...

Embodiment 2

[0027] Embodiment 2, a kind of preparation method of modified support liquid membrane, concrete steps comprise:

[0028] Step 1: Place the polyvinylidene fluoride membrane in 3mol / L sulfuric acid for surface immersion treatment, then wash it with deionized water, dry it, and set it aside.

[0029] Step 2, (1) Synthesis of ionic liquid: Mix n-butane bromide and N-methylimidazole at a ratio of 1.2:1 at room temperature, and reflux the mixture at 70° C. for 24 h. After the reaction, the reaction solution was cooled to room temperature, washed with ethyl acetate, and then placed in a constant temperature electric drying oven to dry to constant weight to obtain brominated 1-butyl-3-methylimidazole. Weigh 16.3gNH 4 PF 6 Dissolve in 100mL deionized water, add an equimolar amount of 1-butyl-3-methylimidazole bromide, and stir in a water bath at 20-40°C for 4-7h. After the reaction is over, let it stand for stratification, wash the lower layer with deionized water, and 1-butyl-3-met...

Embodiment 3-5

[0032] Example 3-5, a method for preparing a modified support liquid membrane, see Example 1 for specific steps, and see Table 1 for relevant data and process conditions.

[0033] Relevant data and processing conditions of table 1 embodiment 3-5

[0034]

[0035] Comparative analysis of results

[0036] figure 1 It is a comparative graph of the mobility of Ni(II) for the molecularly imprinted support ionic liquid membrane system and the existing support liquid membrane system of Example 1 of the present invention, wherein c 0 and c t Respectively represent the initial concentration of Ni(II) in the liquid phase and the time t; figure 2 It is the comparative graph of the mobility of Co(II) for the molecularly imprinted support ionic liquid membrane and the existing support liquid membrane for Example 2 of the present invention, wherein c 0 and c tRepresent the initial and t concentrations of Co(II) in the feed liquid phase, respectively. It can be clearly seen from th...

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Abstract

A method for preparing a modified supported liquid membrane is characterized in that an activation support membrane is soaked in an initiating agent and then is placed in a mixed solution containing template molecules, functional monomers, porogen and cross-linking agents for soaking, afterwards, the activation support membrane is taken out and reacts under irradiation of ultraviolet light to obtain a molecular imprinting support membrane, and after template molecules are removed, the molecular imprinting support membrane is soaked in ionic liquid to obtain a molecular imprinting support ionic liquid membrane. According to the invention, molecular imprinting and ionic liquid are combined to obtain the molecular imprinting support ionic liquid membrane; through the characteristics of the molecular imprinting technology and ionic liquid at ambient temperature, a modification technology is adopted to perform molecular imprinting molecular modification to the surface of a porous support body, and then a layer of dense film having special selectivity to template molecules can be formed, so that not only can the stability of the supported liquid membrane be improved, but also the selectivity, the mass transfer rate and the pollution-resistant capability of the supported liquid membrane can be improved.

Description

technical field [0001] The invention belongs to the technical field of liquid membrane separation, and relates to a modified supported liquid membrane, in particular to a preparation method of a molecularly imprinted supported ionic liquid membrane. Background technique [0002] Liquid membrane separation uses a liquid membrane as the separation medium to separate two mutually soluble liquids with different compositions, and uses the concentration difference as the driving force to achieve the purpose of separation by using the different ability of each component to dissolve and diffuse in the liquid membrane. Separation method. Liquid membrane separation has the advantages of fast separation speed, good selectivity, low energy consumption and the ability to recover resources. It is a new type of separation technology that has been widely used in recent years. Existing liquid membranes include supported liquid membranes, emulsified liquid membranes, and bulk liquid membrane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D71/34B01D69/10B01D61/38C08J9/40C08J9/26C08L27/16C08L33/02C08F220/06C08F222/14C08F2/48
Inventor 余晓皎张帆吕伟桃王娜姚秉华张阿曼黄琳珠
Owner XIAN UNIV OF TECH
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