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Polyethylene glycol desulphurization composite film filled with active carbon and preparation method thereof

A polyethylene glycol and activated carbon technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as incomplete surface thickness and uneven membrane quality, and achieve low cost, simple preparation process, The effect of flux enhancement

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

However, it inevitably has defects such as uneven film quality and inconsistent surface thickness.

Method used

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  • Polyethylene glycol desulphurization composite film filled with active carbon and preparation method thereof
  • Polyethylene glycol desulphurization composite film filled with active carbon and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1) Dry PVDF at 90°C for 6h, then stir and mix PVDF and triethyl phosphate at 70°C with a mass ratio of 3:17, filter and defoam for 4h, and stand at room temperature to obtain a clarified casting solution. Scrape the film on one side of the polyester non-woven fabric, use water as a gel bath, and solidify the PVDF base film supported by the non-woven fabric. After the solvent exchange is complete, soak the base film with 50% ethanol solution for 60 minutes. Dry naturally to obtain a PVDF porous bottom membrane with a thickness of 45 μm.

[0025] 2) 3g of polyethylene glycol with a viscosity of 615mPa·s is dissolved in the mixed solution of ethanol and water (the mass ratio of ethanol and water is 1:1), the mass fraction of polyethylene glycol in the mixed solution of ethanol and water After stirring evenly, add 0.15g (filling amount is 5%) activated carbon powder after passing through a 300 mesh sieve, stir and disperse evenly, add 0.48g maleic anhydride, 0.09g mass frac...

Embodiment 2

[0036] 1) Dry PVDF (polyvinylidene fluoride) at 90°C for 6h, then stir and mix PVDF and triethyl phosphate at 70°C with a mass ratio of 3:17, filter, defoam for 4h, and stand at room temperature to obtain Clarify the casting solution, scrape the film on one side of the polyester non-woven fabric, use water as a gel bath, and solidify the PVDF base film supported by the non-woven fabric. After the solvent exchange is complete, soak the base film in ethanol for 60 minutes, and the natural Dry to obtain a PVDF porous bottom membrane with a thickness of 45 μm.

[0037] 2) 3g of polyethylene glycol with a viscosity of 615mPa·s is dissolved in the mixed solution of ethanol and water (the mass ratio of ethanol and water is 1:1), the mass fraction of polyethylene glycol in the mixed solution of ethanol and water After stirring evenly, add 0.15g activated carbon powder (the filling amount is 5%) after passing through a 100 mesh sieve, stir and disperse evenly, then add 0.48g maleic anh...

Embodiment 3

[0039] The difference from Example 2 is that the mass of activated carbon powder is 0.3g (filling amount is 10%).

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Abstract

The invention provides a polyethylene glycol desulphurization composite film filled with active carbon and a preparation method thereof. The preparation method comprises the following steps: dissolving polyethylene glycol in a mixed solution of ethanol and water, carrying out uniform mixing, then adding active carbon powder and carrying out stirring to realize uniform dispersion; then adding a cross-linking agent and a catalyst, and after uniform mixing, carrying out standing and defoaming so as to obtain a film casting solution; pouring the film casting solution onto a polyvinylidene fluoride bottom film and carrying out knifing; and after volatilization of a solvent, carrying out crosslinking so as to prepare the polyethylene glycol desulphurization composite film filled with active carbon, wherein a mass ratio of polyethylene glycol to the cross-linking agent is (10-20): 1, a mass ratio of polyethylene glycol to the catalyst is (30-35): 1, and the mass of active carbon powder is 5 to 30% of the mass of polyethylene glycol. The preparation method provided by the invention is simple in flow and convenient to operate; the prepared polyethylene glycol desulphurization composite film filled with active carbon has improved permeation flux and selectivity; and better mechanical performance and separation performance of the film can be realized as long as technological conditions are appropriate, so industrial application is realized.

Description

technical field [0001] The invention belongs to the technical field of pervaporation separation, and in particular relates to a polyethylene glycol desulfurization composite membrane filled with activated carbon and a preparation method thereof. Background technique [0002] As one of the most widely used fuels in the world, gasoline has brought countless benefits and conveniences to human beings in the past few decades, but while it benefits human beings, its sulfur emissions will cause serious atmospheric pollution. Pollution, increasingly stringent environmental protection standards require refineries to produce ultra-low sulfur clean gasoline, so the research and development of gasoline deep desulfurization technology has become a hot spot in the current industry research. Traditional hydrodesulfurization technology can achieve the purpose of deep desulfurization, but olefins are easily saturated, resulting in lower octane number of gasoline. Pervaporation membrane gaso...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/52B01D67/00B01D61/36
CPCB01D69/12B01D61/362B01D67/0079B01D71/52
Inventor 韩小龙胡文玲刘亮亮王玉琪
Owner NORTHWEST UNIV
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