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Organic/inorganic hybrid membrane material based on ultra-small-size EMT molecular sieve, preparation method and application in water treatment

A technology of molecular sieve and hybrid membrane, applied in water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, chemical instruments and methods, etc., can solve limitations and other problems, reduce defects and avoid retention rate The effect of reducing and reducing consumption

Active Publication Date: 2020-10-09
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some molecules with special properties have been used as new monomers to prepare thin film composite membranes, but the selection of monomers is still limited to organic molecules, which cannot further combine the unique advantages of inorganic nanoparticles

Method used

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  • Organic/inorganic hybrid membrane material based on ultra-small-size EMT molecular sieve, preparation method and application in water treatment
  • Organic/inorganic hybrid membrane material based on ultra-small-size EMT molecular sieve, preparation method and application in water treatment
  • Organic/inorganic hybrid membrane material based on ultra-small-size EMT molecular sieve, preparation method and application in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031](1) Preparation of ultra-small size EMT molecular sieves

[0032] Preparation Solution A; Solution B was prepared by adding 57.692 g of sodium silicate (27% SiO2, 8% Na2O) and 20.00 g of sodium hydroxide to a 250 mL bottle containing 80 g of DI water, then stirred until the solution was completely clear; both solutions Both were cooled in an ice bath (277K); then, under vigorous stirring, solution A was slowly added to solution B to form a turbid suspension; the suspension was continuously stirred for 5 minutes and then kept at 303K within 36 hours, Then, the mixture was separated by centrifugation and washed with deionized water until pH = 8, and a white powder was obtained by freeze-drying.

[0033] (2) Preparation of aminated EMT molecular sieves

[0034] Put APTES (H2NCH2CH2CH2Si(OC2H5)3) and EMT molecular sieve into a 150ml round bottom flask according to the molar ratio of 2mmol:1g, add 80ml of anhydrous toluene, stir and reflux at 110°C with a constant temperatu...

Embodiment 2

[0044] (1) Prepare ultra-small size EMT type molecular sieve by step 1 of embodiment 1

[0045] (2) Prepare aminated EMT molecular sieves by step 2 of Example 1

[0046] (3) Weighing and dissolving 0.05 g of the amino-functionalized EMT molecular sieve prepared in step (2) in 100 ml of water, ultrasonic treatment for 20 min to form aqueous solution A with a concentration of 0.05% (m / v); Weigh 0.02g of trimesoyl chloride and dissolve it in 100ml of cyclohexane, stir for 5min to form oil phase solution B with a concentration of 0.02% (m / v); take 25ml of A solution in a beaker, and put the cut polyethersulfone Put the bottom film at the bottom of solution A, then slowly introduce solution B into the beaker of solution A, let it stand for 10 minutes, then slowly pull the bottom film out of the page, and dry it at room temperature to obtain the M2 film.

[0047] (4) Conduct powder XRD diffraction pattern test on EMT molecular sieve powder, and conduct SEM, methylene blue, crystal ...

Embodiment 3

[0052] (1) Prepare ultra-small size EMT type molecular sieve by step 1 of embodiment 1

[0053] (2) Prepare aminated EMT molecular sieves by step 2 of Example 1

[0054] (3) Weighing and dissolving 0.075 g of amino-functionalized EMT molecular sieves prepared in step (2) in 100 ml of water, ultrasonic treatment for 20 min to form aqueous solution A with a concentration of 0.075% (m / v); Weigh 0.02g of trimesoyl chloride and dissolve it in 100ml of cyclohexane, stir for 5min to form oil phase solution B with a concentration of 0.02% (m / v); take 25ml of A solution in a beaker, and put the cut polyethersulfone Put the base film at the bottom of solution A, then slowly introduce solution B into the beaker of solution A, let it stand for 10 minutes, then slowly pull the base film out of the page, and dry it at room temperature to obtain the M3 film.

[0055] (4) Carry out powder XRD diffraction pattern test to EMT molecular sieve powder, carry out SEM to the membrane that prepares,...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to an organic / inorganic hybrid membrane material of an EMT type molecular sieve, a preparation method and application of the membrane material in dye separation. The brand-new organic / inorganic hybrid membrane material is prepared on a polyethersulfone carrier by adopting an interfacial polymerization method, and the preparation method comprises the following steps: (1) preparing an ultra-small-size EMT molecular sieve; (2) preparation of an aminated EMT molecular sieve, and (3) preparation of an organic / inorganic hybrid membrane of EMT-NH2. The material can combine the unique advantages of the inorganic nanoparticles so that the phenomenon that the rejection rate is reduced due to non-selective pores in a traditional TFN membrane is avoided.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an organic / inorganic hybrid membrane material of an EMT type molecular sieve, a preparation method and an application of the membrane material in dye separation. Background technique [0002] my country's per capita water resources are only 1 / 4 of the world's per capita water resources, ranking after 120th in the world. Not only that, the uneven distribution of regions and the mismatch of water and land resources make my country's water resources more scarce. In view of the lack of water resources in our country, it is particularly important to re-use non-traditional water resources (industrial wastewater, municipal sewage, recycled sewage). At present, traditional water treatment methods include adsorption method, chemical coagulation method, electrochemical oxidation method, etc. These methods are relatively mature, but they also have the disadvantages of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/68C02F1/44C02F101/30
CPCB01D67/0079B01D69/12B01D71/028B01D71/68C02F1/44C02F2101/308
Inventor 范黎黎孔国栋康子曦孙道峰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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