MOF particle filled silicone rubber pervaporation desulfurization film and preparation method thereof

A pervaporation, silicone rubber technology, applied in chemical instruments and methods, semi-permeable membrane separation, membrane technology and other directions, can solve the problems of small intermolecular force, poor mechanical properties, swelling resistance, etc., to achieve improved desulfurization performance, The effect of improved thermal stability and low cost

Inactive Publication Date: 2016-10-12
NORTHWEST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pure PDMS membrane has a large permeation flux, its industrial application needs to be further improved due to the shortcomings of small intermolecular forces, low selectivity, no resistance to swelling, and poor mechanical properties.

Method used

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  • MOF particle filled silicone rubber pervaporation desulfurization film and preparation method thereof
  • MOF particle filled silicone rubber pervaporation desulfurization film and preparation method thereof
  • MOF particle filled silicone rubber pervaporation desulfurization film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Add 0.373g (1.5×10 -3 mol) nickel acetate (Ⅱ) tetrahydrate and 0.149g (0.75×10 -3 mol) 2,5-dihydroxyterephthalic acid was dissolved in 10mL deionized water and tetrahydrofuran respectively, stirred for 4 hours, placed in a hydrothermal kettle, and reacted hydrothermally at 110°C for 72 hours to obtain a yellow-green solution; the yellow-green solution Repeatedly wash 7-10 times with deionized water, filter, collect the filter cake, and vacuum-dry it at 120°C for 12 hours to obtain CPO-27-Ni type MOF particles, then grind with a mortar for 20 minutes, and pass through a 100-mesh sieve Then put it in a desiccator for later use.

[0026] 2) After drying polyvinylidene fluoride in an oven at 110°C for 24 hours, prepare a triethyl phosphate solution of PVDF (polyvinylidene fluoride) with a mass fraction of 15%, filter it while it is hot at 70°C, and let it stand for defoaming to Use water as a gel bath, use the immersion phase inversion method to scrape the film on the ...

Embodiment 2

[0029] The difference from Example 1 is that the amount of CPO-27-Ni type MOF particles added is 4% of the mass of polydimethylsiloxane, and the thickness of the polydimethylsiloxane layer is 22-25 μm.

Embodiment 3

[0031] The difference from Example 1 is that the amount of CPO-27-Ni type MOF particles added is 6% of the mass of polydimethylsiloxane, and the thickness of the polydimethylsiloxane layer is 26-29 μm.

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Abstract

An MOF particle filled silicone rubber pervaporation desulfurization film and a preparation method thereof are provided. The preparation method comprises the steps: after mixing and stirring evenly polydimethylsiloxane and an organic solvent, adding CPO-27-Ni type MOF particles, continuing to stir, then adding a cross-linking agent and a catalyst, mixing evenly, and carrying out static defoaming to obtain a film casting solution; and pouring the film casting solution on a polyvinylidene fluoride base film and scraping the film, after the solvent is volatilized, cross-linking, forming a polydimethylsiloxane layer on the polyvinylidene fluoride base film, and thus obtaining the MOF particle filled silicone rubber pervaporation desulfurization film. The prepared mixed matrix film is simple in preparation process and low in cost; and when the film is used in thiophene-n-heptane system separation, desulfurization is carried out prior. The preparation method is stable and reliable, and can improve the permeation flux and sulfur rich factors, is suitable for filling of other types of organic films, and has good industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of pervaporation separation, and in particular relates to a pervaporation desulfurization membrane filled with MOF particles and a preparation method thereof. Background technique [0002] Sulfur compounds in gasoline burn to produce SO 2 Gas seriously pollutes the environment. Based on the requirements of environmental protection, the content of sulfur components in gasoline must be reduced. The source of oil products in my country is relatively single. Fluid Catalytic Cracking (FCC) gasoline accounts for about 80% of the oil product market and is the main contributor to the sulfur components in gasoline. China plans to implement the National V standard nationwide on January 1, 2018, reducing the upper limit of organic sulfur content in gasoline to 10ppm. Affected by this, according to the sources of oil products in my country, deep desulfurization of FCC gasoline under the premise of considering the cost...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/70B01D67/00B01D61/36
CPCB01D61/362B01D67/0079B01D69/12B01D71/70
Inventor 韩小龙刘亮亮胡文玲王玉琪
Owner NORTHWEST UNIV
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