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Preparation of a hinged structure pims membrane and its application in the field of gas separation

A hinge structure, PIM-1 technology, applied in the fields of recovery, CO2 separation, and capture, can solve the problems of insufficient membrane separation performance and restrictions on the application of membrane separation technology

Active Publication Date: 2020-12-01
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the separation performance of the commonly used membrane materials is still not high enough, which restricts the application of membrane separation technology in CO 2 Large-scale applications in the field of separation

Method used

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  • Preparation of a hinged structure pims membrane and its application in the field of gas separation
  • Preparation of a hinged structure pims membrane and its application in the field of gas separation
  • Preparation of a hinged structure pims membrane and its application in the field of gas separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] In a nitrogen atmosphere, TTSBI, TFTPN and a small amount of anhydrous K with a molar ratio of 1:1 2 CO 3 Dissolve in an appropriate amount of DMF, heat and reflux at 140°C for 2 hours, pour into sufficient deionized water to precipitate and filter after cooling, heat and reflux in hydrochloric acid solution for 3 hours, filter, wash with water until neutral, wash with methanol 3 to 5 times, and vacuum dry Dry in oven at 120° for 24h. Take a certain amount of PIM-1 synthesized by the high-temperature method and dissolve it in chloroform to make a casting solution with a mass fraction of 3%, stir it overnight until it is fully dissolved, filter to remove the residue, flow the solution on the PAN bottom film to form a film, and dry it at room temperature After 24 hours, vacuum-dry at 80° C. for 24 hours to obtain a PIM-1 gas separation membrane.

[0023] Test gas separation performance:

[0024] Pco 2 =2814Barrer

[0025] alpha i / j =17.8

Embodiment 2

[0027] In a nitrogen atmosphere, TTSBI, TFTPN and a small amount of anhydrous K with a molar ratio of 1:1 2 CO 3 Dissolve in an appropriate amount of DMAc, heat and reflux at 65°C for 72 hours, pour into sufficient deionized water to precipitate and filter after cooling, heat and reflux in hydrochloric acid solution for 3 hours, filter, wash with water until neutral, wash with methanol 3 to 5 times, and vacuum dry Dry in oven at 120° for 24h. Take a certain amount of PIM-1 synthesized by the low-temperature method and dissolve it in chloroform to form a casting solution with a mass fraction of 3%, stir it overnight until it is fully dissolved, filter to remove the residue, flow the solution on the PS bottom film to form a film, and dry it at room temperature After 24 hours, vacuum-dry at 80° C. for 24 hours to obtain a PIM-1 gas separation membrane.

[0028] Test gas separation performance:

[0029] Pco 2 =4424Barrer

[0030] alpha i / j =15.2

Embodiment 3

[0032] In a nitrogen atmosphere, take TTSBI, BDPF, TFTPN with a molar ratio of 1:1:2 and a small amount of anhydrous K 2 CO 3 Dissolve in an appropriate amount of DMF, heat and reflux at 140°C for 2 hours, pour into sufficient deionized water to precipitate and filter after cooling, heat and reflux in hydrochloric acid solution for 3 hours, filter, wash with water until neutral, wash with methanol 3 to 5 times, and vacuum dry Dry in oven at 120° for 24h. Take a certain amount of Cardo-PIM-1 synthesized by the high-temperature method and dissolve it in chloroform to form a casting solution with a mass fraction of 3%. Stir it overnight until it is fully dissolved and then filter to remove the residue. After drying at 80°C for 24 hours in vacuum, the Cardo-PIM-1 gas separation membrane was obtained.

[0033] Test gas separation performance:

[0034] Pco 2 =8420Barrer

[0035] alpha i / j =16.5

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PUM

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Abstract

A PIMs (polymers of intrinsic microporosity) polymer which is Cardo-PIM-1 and which has a novel cardo structure is prepared by utilizing a bimolecular nucleophilic reaction among tetrafluoroterephthalonitrile (TFTPN), 5,5',6,6'-tetrahydroxy-3,3',3,3'-tetramethyl-1,1'-spirobisindane (TTSBI) and 9,9-bis(3,4-hydroxyphenyl)fluorene (BDPF) in the invention, and the polymer is prepared into a gas separation film used for CO2 / N2 separation. Compared with traditional PIM-1 gas separation films, gas permeability of the film material is greatly improved by introduction of the cardo structure, thus developing a novel thought and a novel method for researching gas separation films.

Description

technical field [0001] The invention relates to a preparation method of a membrane material with good gas separation performance, which is suitable for CO in power plant flue gas and other industrial processes. 2 Separation, capture, recycling and other fields. Background technique [0002] Stepping into the 21st century, rapid economic development and population growth have led to global CO 2 Emissions have increased significantly, which has caused a series of problems such as global warming. According to the third climate change assessment report of the United Nations Intergovernmental Panel on Climate Change (IPCC), it is expected that the global average surface temperature will rise by 1.4°C to 5.8°C in 2100 (the average surface temperature is generally about 15°C). This estimate has taken into account the cooling effect of suspended particles in the atmosphere on the Earth's climate and the heat-absorbing effect of the ocean. Although there are many undetermined fact...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/10B01D69/02B01D71/06B01D53/22
CPCB01D53/228B01D67/0011B01D67/0013B01D69/02B01D69/10B01D71/06B01D2257/504B01D2325/02Y02C20/40
Inventor 孙海翔高雯张琰玮赵浩如李鹏牛青山
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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