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A method for preparing peg/cu-btc/pvdf desulfurization mixed matrix membrane by water-based process

A mixed-matrix membrane and water-based technology, applied in dialysis purification, chemical instruments and methods, membrane technology, etc., can solve problems such as easy aggregation of particles, uneven dispersion of particles, and interface defects between fillers and polymer substrates. Good dispersibility, promotion of transmission, and the effect of relieving interface defects

Active Publication Date: 2021-10-29
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are two major problems in the mixed matrix membrane prepared by the traditional method. One is that there are interface defects between the filler and the polymer substrate; the other is that the particles are not uniformly dispersed. Using the traditional physical mixing method, the particles will easily agglomerate.

Method used

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  • A method for preparing peg/cu-btc/pvdf desulfurization mixed matrix membrane by water-based process
  • A method for preparing peg/cu-btc/pvdf desulfurization mixed matrix membrane by water-based process
  • A method for preparing peg/cu-btc/pvdf desulfurization mixed matrix membrane by water-based process

Examples

Experimental program
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Effect test

Embodiment 1

[0042] After drying PVDF-1015 in an oven at 110°C for 6 hours, add polyvinylidene fluoride powder with a mass fraction of 15% to triethyl phosphate solution and stir for 12 hours, filter while it is hot, and place it in a vacuum oven for defoaming 2h, to obtain a clear polyvinylidene fluoride casting solution, and evenly scrape it on the polyester non-woven fabric, control the thickness between the scraper and the non-woven fabric to be 150 μm, use deionized water as the gel bath, and use the immersion precipitation phase The polyvinylidene fluoride base film supported by polyester non-woven fabric is obtained by conversion method, and a new gel bath is replaced for 2-3 hours to further exchange the solvent and non-solvent. After 48 hours, the base film is taken out and dried naturally to obtain polyvinylidene fluoride Vinyl porous backing film.

[0043] Dissolve 1.5mmol of copper nitrate trihydrate and 1.0mmol of trimesic acid in a mixed solution of 12mL deionized water and e...

Embodiment 2

[0046] After drying PVDF-1015 in an oven at 110°C for 6 hours, add polyvinylidene fluoride powder with a mass fraction of 15% to triethyl phosphate solution and stir for 12 hours, filter while it is hot, and place it in a vacuum oven for defoaming 2h, get a clear polyvinylidene fluoride casting solution, evenly scrape it on the polyester non-woven fabric, control the thickness between the scraper and the non-woven fabric to be 150 μm, use ethanol as the gel bath, and use the immersion precipitation phase inversion method Get the polyvinylidene fluoride base film supported by polyester non-woven fabric, replace the new gel bath for 2-3 hours to carry out further exchange of solvent and non-solvent, take out the bottom film after 48 hours and let it dry naturally to obtain porous polyvinylidene fluoride base film.

[0047] Dissolve 1.5mmol of copper nitrate trihydrate and 1.0mmol of trimesic acid in a mixed solution of 12mL deionized water and ethanol (volume ratio of deionized ...

Embodiment 3

[0051] After drying PVDF-1015 in an oven at 110°C for 6 hours, add polyvinylidene fluoride powder with a mass fraction of 15% to triethyl phosphate solution and stir for 12 hours, filter while it is hot, and place it in a vacuum oven for defoaming 2h, to obtain a clear polyvinylidene fluoride casting solution, and evenly scrape it on the polyester non-woven fabric, control the thickness between the scraper and the non-woven fabric to be 150 μm, use deionized water as the gel bath, and use the immersion precipitation phase The polyvinylidene fluoride base film supported by polyester non-woven fabric is obtained by conversion method, and a new gel bath is replaced for 2-3 hours to further exchange the solvent and non-solvent. After 48 hours, the base film is taken out and dried naturally to obtain polyvinylidene fluoride Vinyl porous backing film.

[0052] Dissolve 1.5mmol of copper nitrate trihydrate and 1.0mmol of trimesic acid in a mixed solution of 12mL deionized water and e...

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Abstract

The invention belongs to the technical field of pervaporation membrane separation, and discloses a method for preparing a PEG / Cu-BTC / PVDF desulfurization mixed matrix membrane by a water-based process. Process The obtained product is added into a polyethylene glycol (PEG) solution, and then scraped on a polyvinylidene fluoride (PVDF) porous bottom membrane to prepare a mixed matrix membrane. The preparation process of the method is simple, and when used for the separation of thiophene-n-heptane system, desulfurization is preferred. Since the present invention does not use the traditional idea of ​​synthesizing inorganic particles first, drying them and then dispersing them, it solves the two major problems of particle agglomeration and interface defects, effectively improves the permeation flux and selectivity of the desulfurization membrane, and has wide applications prospect.

Description

technical field [0001] The invention relates to the technical field of pervaporation membrane separation, in particular to a method for preparing a PEG / Cu-BTC / PVDF desulfurization mixed matrix membrane by a water-based process. Background technique [0002] With the continuous growth of my country's GDP, the national per capita automobile demand is also showing a gradual increase trend. Automobile exhaust (SOx) has become one of the main sources of outdoor air pollutants. The traditional industrial method is catalytic hydrodesulfurization, which has the advantages of high removal efficiency, flexible and diverse raw material processing methods, and rich and mature industrial experience, but at the same time, its disadvantages are that the catalyst cannot be recycled and the octane number decreases when olefins are hydrogenated . In recent years, researchers have focused on replacing residual thiophenes and alkylthiophenes in FCC gasoline with adsorption processes instead o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/38B01D69/12B01D69/02B01D67/00B01D61/36C10G31/11C07D333/10C07C7/12C07C9/15
CPCB01D61/362B01D67/0079B01D69/02B01D69/12B01D71/38C07C7/12C07D333/10C10G31/11C07C9/15
Inventor 韩小龙蔡采彬樊晓涛高健
Owner NORTHWEST UNIV