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Stable promotive transfer film for olefin/alkane separation and preparation method thereof

A technology that promotes the transfer of membranes and stabilizes them. It is applied in separation methods, membrane purification/separation, and semipermeable membrane separations. It can solve the problems of industrial application limitations, carrier loss or reduction, carrier stability and separation performance decline, etc. Achieve the effect of improving separation selectivity and carrier effect

Inactive Publication Date: 2016-07-20
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since Ag + During the separation process of olefins, the carrier is easy to lose or be reduced, resulting in a decrease in the stability and separation performance of the carrier, so its industrial application is limited.

Method used

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  • Stable promotive transfer film for olefin/alkane separation and preparation method thereof
  • Stable promotive transfer film for olefin/alkane separation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 0.05g of TCNE in 10ml of absolute ethanol, and disperse evenly by ultrasonic; add 0.1g of silver nanoparticles, and disperse evenly by ultrasonic; take 2g of EC and dissolve it in 10ml of benzene, after fully dissolved, mix and stir with TCNE solution containing silver nanoparticles for 24h , and left to stand for 24 hours after filtration; the mixed solution was evenly coated on the PI base film, and placed in a drying oven to dry for 24 hours to obtain an EC / Ag / TCNE facilitated transport film loaded with silver nanoparticles. The olefin / alkane separation performance of the facilitated transfer membrane was tested with a constant volume variable pressure gas tester (test temperature was 30°C, test pressure was 0.1MPa), and its separation selectivity for propylene / propane was 8. After a week-long test period, the separation selectivity decreased slightly.

Embodiment 2

[0030] Dissolve 0.1g of TCNE in 10ml of absolute ethanol, disperse evenly by ultrasonic, add 0.1g of silver nanoparticles, and disperse evenly by ultrasonic; take 2g of EC and dissolve in 10ml of benzene, after fully dissolved, mix and stir with TCNE solution containing silver nanoparticles for 24h , and left to stand for 24 hours after filtration; the mixed solution was evenly coated on the PI base film, and placed in a drying oven to dry for 24 hours to obtain an EC / Ag / TCNE facilitated transport film loaded with silver nanoparticles. The olefin / alkane separation performance of the facilitated transfer membrane was tested with a constant volume variable pressure gas tester (test temperature was 30°C, test pressure was 0.1MPa), and its separation selectivity for propylene / propane was 10. After a week-long test period, the separation selectivity did not decrease significantly.

Embodiment 3

[0032] Dissolve 0.1g of TCNE in 10ml of absolute ethanol, disperse evenly by ultrasonic, add 0.2g of silver nanoparticles, and disperse evenly by ultrasonic; take 2.5g of EC and dissolve in 10ml of benzene, after fully dissolved, mix and stir with TCNE solution containing silver nanoparticles After filtering for 24 hours, let it stand for 24 hours; apply the mixed solution evenly on the PI base film, and place it in a drying oven to dry for 24 hours to obtain the EC / Ag / TCNE facilitated transport film with silver nanoparticles immobilized. The olefin / alkane separation performance of the facilitated transfer membrane was tested with a constant volume variable pressure gas tester (test temperature was 30°C, test pressure was 0.1MPa), and its separation selectivity for propylene / propane was 12. After a week-long test period, the separation selectivity did not decrease significantly.

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PUM

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Abstract

The invention provides a stable promotive transfer film for olefin / alkane separation and a preparation method thereof. Tetracyanoethylene is introduced to an organic / inorganic composite film containing silver nanoparticles, the function of silver ions to carry olefins is improved through high electrophilic substitution of cyano groups, and separation selectivity of the film for olefins / alkanes and long-term stability of the film are improved effectively.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, and relates to a stable facilitated transfer membrane for separating olefin / alkane gas and a preparation method thereof. The prepared gas separation membrane is suitable for the field of petrochemical industry. Background technique [0002] Olefins such as ethylene and propylene are very important synthetic chemical raw materials, and are widely used to produce polyethylene, polypropylene and olefin copolymers. In recent years, the annual growth rate of global ethylene and propylene production has been maintained at 4% to 5%. At present, the industry mainly uses steam or catalytic cracking alkanes and low-temperature distillation technology to produce and separate olefins. The operating conditions of low temperature, high pressure, and large reflux ratio make it a high-energy separation process. In view of the high yield of olefins and the high purity requirements in the application pr...

Claims

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Application Information

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IPC IPC(8): B01D71/64B01D71/10B01D69/12B01D67/00C07C7/144C07C11/04C07C11/06B01D53/22
CPCB01D71/64B01D53/228B01D67/0079B01D69/12B01D71/10B01D2323/12C07C7/144C07C11/04C07C11/06
Inventor 孙海翔李鹏远冰冰高雯徐岩岩
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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