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Method for preparing CO2 separation membrane material and composite membrane

A technology for separating membranes and polymers, which is applied in separation methods, semipermeable membrane separations, and dispersed particle separations. It can solve the problems of reduced polymer screening ability and difficulty in improving gas separation performance, and achieves improved plasticization resistance. , Improve membrane dissolution selectivity and good separation performance

Inactive Publication Date: 2010-06-16
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, many feed gases such as raw natural gas contain CO with high partial pressure and high content 2 The plasticizing phenomenon caused by the gas can greatly reduce the sieving ability of the polymer, so it is sometimes difficult to improve the separation performance of the gas only by improving the sieving ability of the polymerization (increasing the diffusion selectivity), especially in the gas. Contains a lot of CO 2 and other acidic gases

Method used

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  • Method for preparing CO2 separation membrane material and composite membrane
  • Method for preparing CO2 separation membrane material and composite membrane
  • Method for preparing CO2 separation membrane material and composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036]Take 4g of DMAEMA and 1g of PEGMEMA (molecular weight 130) and add them to about 10g of THF, add 0.1% initiator AIBN of the total mass, pass through nitrogen to remove oxygen in the solution, then heat to 80°C for reflux reaction for 24h, pour the solution after cooling Precipitate in petroleum ether under stirring to obtain a white polymer, then put it in a vacuum oven and bake at 80°C for 24 hours to obtain a light yellow and transparent polymer PDMAEMA-PEGMEMA, take 0.5g of PDMAEMA-PEGMEA and dissolve it in 20ml of ethanol, then Take 0.223XDC (xylene dichloride) as a cross-linking agent and dissolve it in 15ml of ethanol, then mix the two solutions, ultrasonicate for 10min; pour (submerge) on the polysulfone plate bottom membrane treated with ethanol, then pour out the solution at room temperature Dry, repeat twice, and finally dry at room temperature for 24 hours.

[0037] Test gas separation performance:

[0038] J CO2 / l=20×10 -6 cm 3 (STP). / cm 2 .s.cmHg

[0...

Embodiment 2

[0041] Take 3g of DMAEMA and 7g of PEGMEMA (molecular weight: 530) and add them to about 20g of THF, add 0.1% initiator AIBN of the total mass, pass through nitrogen to remove oxygen in the solution, then heat to 80°C for reflux reaction for 24h, pour the solution after cooling Precipitate in petroleum ether under stirring to obtain a white polymer, and then put it in a vacuum oven at 80°C for 24 hours to obtain a light yellow and transparent polymer PDMAEMA-PEGMEMA. Take 0.5g of PDMAEMA-PEGMEA and dissolve it in 20ml of ethanol, and then take Dissolve 0.0835g XDC (xylene dichloride) in 15ml ethanol as a cross-linking agent, then mix the two solutions, sonicate for 10min, and pour it on the bottom film of the polysulfone flat plate treated with ethanol, then pour off the solution and dry it at room temperature, repeat 2 times, and finally dry at room temperature for 24 hours.

[0042] Test gas separation performance:

[0043] J CO2 / l=80×10 -6 cm 3 (STP). / cm 2 .s.cmHg

...

Embodiment 3

[0046] Take 1g of DMAEMA and 9g of PEGMEMA (molecular weight 530) and add it to about 20g of THF, add 0.1% initiator AIBN of the total mass, feed nitrogen to remove oxygen in the solution, then heat to 80°C for reflux reaction for 24h, pour the solution after cooling Precipitate in petroleum ether under stirring to obtain a white polymer, and then put it in a vacuum oven at 80°C for 24 hours to obtain a light yellow and transparent polymer PDMAEMA-PEGMEMA. Take 0.5g of PDMAEMA-PEGMEA and dissolve it in 20ml of ethanol, and then take 0.0278 gXDC (xylene dichloride) was dissolved in 15ml of ethanol as a cross-linking agent, then the two solutions were mixed, ultrasonicated for 10 minutes, poured (submerged) on the polysulfone plate base film treated with ethanol, and then poured out the solution and dried at room temperature. Repeat 2 times, and finally dry at room temperature for 24 hours.

[0047] Test gas separation performance:

[0048] J CO2 / l=110×10 -6 cm 3 (STP). / cm ...

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Abstract

The invention relates to a macromolecule separation membrane technology, in particular to a method for preparing a CO2 separation membrane material and a composite membrane, comprising the following steps of: adding DM and PEGA to a tetrahydrofuran dissolvant, and then adding an initiator, wherein the total mass percent of the DM and the PEGA is 5-90 percent, and the mass percent of the initiator is 0.07-1 percent; then heating a 50-90 DEG C of oil bath for reflux; reacting for 10-30h; after the reaction, pouring into a stirring nonpolar dissolvant after the solution is cooled to the room temperature for settlement to obtain a white viscous polymer; and then baking for 20-30h in a vacuum baking oven at the temperature of 70-120 DEG C to obtain a light yellow transparent polymer PDM-PEGA. A composite plate prepared by the invention has good separating performance on CO1 / CH4, CO2 / Na and CO2 / H2.

Description

technical field [0001] The present invention relates to polymer separation membrane technology, specifically prepares CO containing functional groups for promoting transfer and ether oxygen functional groups 2 Preferentially permeable separation membranes. Background technique [0002] CO 2 The separation and removal of is a separation process with great potential and industrial prospects. Hydrogen is one of the main energy sources in the future; at present, the main source of hydrogen is through the reforming of alkanes and the reaction of hydration gas, which produces CO 2 impurity gas, in order to obtain pure hydrogen source, CO 2 The removal is very important. Natural gas is one of the main energy and chemical raw materials in the world in recent decades, and natural gas products often contain a large amount of CO 2 Impurities, which not only affect the quality of natural gas combustion, but also corrode pipelines and equipment for transporting natural gas (CO 2 is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/78B01D71/40B01D53/22C01B31/20C01B32/50
CPCY02C10/10Y02C20/40Y02P20/151
Inventor 曹义鸣赵红永介兴明丁晓莉刘健辉周美青
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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