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Polyether-b-polyamide (PEBA)/polyethyleneglycol (PEG) or polyoxyethylene (PEO) blend membrane, and preparation and application thereof

A technology of blending membranes and membrane materials, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., to achieve high separation performance and improve the effect of selectivity decline

Inactive Publication Date: 2013-05-15
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Liu Li, Bondar, Kim and others studied the permeability and separation performance of different types of PEBA materials, showing that PEBA has high selective permeability in polar / non-polar gas separation, but the permeation flux still needs to be further improved

Method used

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  • Polyether-b-polyamide (PEBA)/polyethyleneglycol (PEG) or polyoxyethylene (PEO) blend membrane, and preparation and application thereof
  • Polyether-b-polyamide (PEBA)/polyethyleneglycol (PEG) or polyoxyethylene (PEO) blend membrane, and preparation and application thereof
  • Polyether-b-polyamide (PEBA)/polyethyleneglycol (PEG) or polyoxyethylene (PEO) blend membrane, and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Add 5 grams of vacuum-dried Pebax1074 (m(PEO):m(PA12)=45:55, mass ratio) to 95 grams of n-butanol solvent, and stir at 80°C for 6 hours to form a uniform and transparent polymer After the solution, add 0.55 g of PEG200 to the polymer solution, continue to stir for 2 hours, and after forming a uniform and transparent solution again, perform negative pressure degassing; pour the defoamed casting solution into a clean horizontal glass plate In the smooth iron ring, the casting solution is evenly spread on the glass plate, and the temperature of the glass plate is kept at 50°C, and the solvent is volatilized, and the primary film is finally formed. The nascent film was carefully removed from the glass plate, placed in a vacuum oven, dried at 50° C. for 48 h, and the residual solvent was removed to obtain a PEBA / PEG200 (10%) blended homogeneous film with a PEG200 content of 10 wt.%, and Test its permeability (35°C).

[0056] The experimental result of table 1 embodiment 1 ...

Embodiment 2

[0059] Add 5 grams of vacuum-dried Pebax1074 to 95 grams of n-butanol solvent, stir at 80°C for 6 hours to form a uniform and transparent polymer solution, add 0.55 grams of PEG400 to the polymer solution, and continue stirring for 2 hours. After forming a uniform and transparent solution again, perform ultrasonic degassing, pour the defoamed casting solution into a smooth iron ring on a clean horizontal glass plate, so that the casting solution spreads evenly on the glass plate, and the temperature of the glass plate Keep at 50°C to volatilize the solvent and finally form a primary film. The nascent film was carefully removed from the glass plate, placed in a vacuum oven, dried at 50° C. for 48 h, and the residual solvent was removed to obtain a PEBA / PEG400 (10%) blended homogeneous film with a PEG400 content of 10 wt.%, and Test its permeability (35°C).

[0060] The experimental result of table 2 embodiment 2

[0061]

Embodiment 3

[0063] Add 5 grams of vacuum-dried Pebax1074 to 95 grams of n-butanol solvent, stir at 80°C for 6 hours to form a uniform and transparent polymer solution, add 0.55 grams of PEG600 to the polymer solution, and continue stirring for 2 hours. After forming a uniform and transparent solution again, let it stand for defoaming, and pour the defoamed casting solution into a smooth iron ring on a clean horizontal glass plate to spread the casting solution evenly on the glass plate. The temperature is kept at 50° C., and the solvent is volatilized to finally form a primary film. The nascent film was carefully removed from the glass plate, put into a vacuum oven, dried at 50°C for 48h, and the residual solvent was removed to obtain a PEBA / PEG600 (10%) blended homogeneous film with a PEG600 content of 10wt.%, and Test its permeability (35°C).

[0064] The experimental result of table 3 embodiment 3

[0065]

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Abstract

The invention relates to a gas separation membrane, particularly a polyether-b-polyamide (PEBA) / polyethyleneglycol (PEG) blend gas separation membrane for acidic gas separation. PEBA containing ether oxygen group and PEG (PEO) used as membrane materials are made into the gas separation membrane by a solution blending method. The blend membrane is preferably permeable for CO2, H2S, SO2 and other acidic gases, and also has high separating property for CO2 / N2, SO2 / N2, H2S / CH4, CO2 / CH4, CO2 / H2 or other systems. The blend membrane has a temperature threshold which is related to the molecular weight of the PEG (PEO).

Description

technical field [0001] The present invention relates to gas separation membrane technology, specifically a kind of polyether-b-polyamide PEBA / polyethylene glycol PEG (polyethylene oxide PEO) blend membrane, and this polymer blend membrane can preferentially permeate CO 2 、H 2 S and SO 2 and other acid gases. Background technique [0002] Acid gas CO 2 、H 2 S and SO 2 The removal and separation of carbon dioxide is an important separation process in the fields of environment, energy and chemical industry, mainly including flue gas (CO 2 / N 2 , SO 2 / N 2 ), natural gas and oil-associated gas (CO 2 / CH 4 、H 2 S / CH 4 ) and syngas (CO 2 / H 2 ) removal and separation of acid gases. At present, the traditional methods for acid gas separation mainly include physical absorption method, chemical absorption method, pressure swing adsorption method and low temperature condensation method, etc. Each method has its own advantages, but there are also problems of large equipm...

Claims

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Application Information

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IPC IPC(8): B01D71/56B01D69/12B01D67/00B01D53/22
Inventor 任吉中冯世超李晖邓麦村
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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