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A kind of antistatic gas separation composite membrane and preparation method thereof

A gas separation and anti-static technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of complicated production process, difficult to prepare gas separation composite membrane, insoluble and infusible, etc., and achieve wide application foreground effect

Active Publication Date: 2020-10-30
DALIAN EUROFILM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Another method is to add a conductive polymer layer in the middle of the composite membrane. The production process of this method is complicated, and the only few conductive polymers are insoluble and infusible, so it is not easy to prepare gas separation composite membranes.

Method used

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  • A kind of antistatic gas separation composite membrane and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Dissolve 70 parts of vinylmethylsiloxane-octylmethicone-dimethylsiloxane copolymer in 930 parts of isooctane, add 4 parts of polymethylhydrogensiloxane, 3 parts of 1 , 3-divinyl-1,1,3,3-tetramethyldisiloxane platinum complex, stirred at 40°C for 60 minutes, then added 1 part of 1-octyl-3-methylimidazolium tetrafluoroboron salt, stirred at 40°C for 30 minutes, and prepared as a membrane solution for the separation layer. The membrane solution of the separation layer was evenly coated on the polyacrylonitrile bottom membrane with a pore size of 25 nm, dried at room temperature for 10 minutes, and then dried at 100°C for 20 minutes to prepare a composite membrane. Test its O at 25°C 2 and N 2 The permeation and separation properties of the flux are J N2 =0.28m 3 / m 2 h bar, α O2 / N2 =2.33. Test its surface resistance to measure as 10 8 Ω.

Embodiment 2

[0038] Dissolve 70 parts of vinylmethylsiloxane-octylmethicone-dimethylsiloxane copolymer in 930 parts of isooctane, add 4 parts of polymethylhydrogensiloxane, 3 parts of 1 , 3-divinyl-1,1,3,3-tetramethyldisiloxane platinum complex, stirred at 40°C for 60 minutes, then added 10 parts of 1-octyl-3-methylimidazolium tetrafluoroboron acid salt, and continued to stir at 40°C for 60 minutes to prepare a separation layer membrane solution. The membrane solution of the separation layer was evenly coated on the polyacrylonitrile bottom membrane with a pore size of 25 nm, dried at room temperature for 10 minutes, and then dried at 100°C for 20 minutes to prepare a composite membrane. Test its O at 25°C 2 and N 2 The permeation and separation properties of the flux are J N2 =0.24m 3 / m 2 h bar, α O2 / N2 =2.33. Test its surface resistance to measure as 10 6 Ω.

Embodiment 3

[0040] Dissolve 70 parts of vinylmethylsiloxane-octylmethicone-dimethylsiloxane copolymer in 930 parts of isooctane, add 4 parts of polymethylhydrogensiloxane, 3 parts of 1 , 3-divinyl-1,1,3,3-tetramethyldisiloxane platinum complex, add 10 parts of 1-octyl-3-methylimidazolium tetrafluoroborate, stir at 40°C 90min, prepare the separation layer membrane solution. The membrane solution of the separation layer was evenly coated on the polyacrylonitrile bottom membrane with a pore size of 25 nm, dried at room temperature for 10 minutes, and then dried at 100°C for 20 minutes to prepare a composite membrane. Test its O at 25°C2 and N 2 The permeation and separation properties of the flux are J N2 =0.28m 3 / m 2 h bar, α O2 / N2 =2.33. Test its surface resistance to measure as 10 6 Ω.

[0041] In Comparative Example 1, no ionic liquid was added, and the prepared composite membrane had N 2 Flux and O 2 / N 2 The selectivity is J N2 =0.28m 3 / m 2 h bar, α O2 / N2 =2.33. The s...

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Abstract

The invention discloses an anti-static gas separation composite membrane and a preparation method thereof. A porous base membrane is dip-coated with separation layer solution containing ionic liquid to prepare the anti-static composite membrane. The ionic liquid dissolved in a non-polar solvent can be uniformly mixed with the separation layer membrane solution to obtain homogeneous separation layer membrane solution. The prepared composite membrane not only keeps original penetrating and separating properties, but also has an anti-static property. The anti-static composite membrane prepared bythe method is applicable to oil and gas recovery of an oil depot and a petrol station and has a wide application prospect.

Description

technical field [0001] The invention relates to antistatic membrane technology, in particular to a method for preparing an antistatic composite membrane used for gas separation. Background technique [0002] Static electricity is one of the main ignition sources of fire and explosion accidents in oil depots and gas stations. During the storage, transportation, transportation, loading and unloading of oil products in oil depots and gas stations, static electricity will inevitably be generated. The oil itself is a flammable and explosive liquid. When the electrostatic discharge energy exceeds the minimum ignition energy of the oil vapor, the oil can be ignited and detonated. The harm of static electricity in the operation process of oil depot and gas station is very great. The oil gas recovery system is installed in gas stations and oil depots to ensure that the oil and gas generated in the gasoline process such as purchase, sales and storage can be effectively recovered to r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D69/02B01D67/00B01D53/22
CPCB01D53/228B01D67/0002B01D69/02B01D69/12B01D2325/26
Inventor 张玉玲谭杰季鹏飞王连军魏艳娟刘宇孟兆伟滕野杜国栋李恕广栗广勇
Owner DALIAN EUROFILM IND