Method for preparing fixed carrier compound membrane for CO2 separation by utilizing interfacial polymerization

A technology of interfacial polymerization and immobilized carrier, applied in separation methods, semi-permeable membrane separation, dispersion particle separation, etc., to achieve low cost, easy operation, and simple methods

Inactive Publication Date: 2007-07-18
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, few researchers have prepared and separated CO by interfacial polymerization. 2 gas immobilized carrier composite membrane

Method used

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  • Method for preparing fixed carrier compound membrane for CO2 separation by utilizing interfacial polymerization

Examples

Experimental program
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Effect test

example 1

[0019] The polyethersulfone ultrafiltration membrane is treated with surfactant sodium dodecylsulfonate dilute aqueous solution (mass concentration 0.5%); Get electrodeionized water 1400ml, triethylenetetramine 45ml, be made into a mass concentration of 2.8% Aqueous solution, in addition, add 7.283g of anhydrous sodium carbonate to the aqueous solution; take 1300ml of n-hexane and 12.466g of trimesoyl chloride to prepare a n-hexane solution with a mass concentration of 1.4%. First, immerse the treated polyethersulfone ultrafiltration membrane in the aqueous solution for 10 minutes at room temperature (25° C.), take it out, immerse it in n-hexane solution, take out the interfacial polymerization time for 3 minutes, take it out, wash the composite membrane with electrodeionized water, and then The composite film is heat-treated at 70° C. for 3 minutes, and finally dried at room temperature. With mixed gas 90vol% CO 2 / 10vol%CH 4 Composite membranes were tested. When the feed ...

example 2

[0021] The polysulfone ultrafiltration membrane is treated with surfactant sodium dodecylsulfonate dilute aqueous solution (0.5% in mass concentration); 1000ml of electrodeionized water and 87ml of diethylenetriamine are taken to form an 8% aqueous solution with a mass concentration , in addition, add 9.266g of anhydrous sodium carbonate to the aqueous solution; take 1000ml of n-hexane, 19.678g of trimesoyl chloride, and 20.022g of isophthaloyl chloride, the mass ratio of the two is about 50:50, and the mass concentration is 6%. n-hexane solution. First, immerse the treated polysulfone ultrafiltration membrane in the aqueous solution at room temperature (20°C) for 20 minutes, take it out, immerse it in n-hexane solution, take out the interfacial polymerization time for 5 minutes, take it out, wash the composite membrane with electrodeionized water, and then wash it at a temperature of 15 Dry naturally at room temperature. With mixed gas 90vol% CO 2 / 10vol%CH 4 Composite mem...

example 3

[0023] The polysulfone ultrafiltration membrane is processed with tensio-active agent sodium dodecylsulfonate dilute aqueous solution (0.5wt%); Get electrodeionized water 1000ml, tetraethylenepentamine 130ml, be made into the aqueous solution that mass concentration is 12%, In addition, 5.421 g of anhydrous sodium carbonate was added to the aqueous solution; 1000 ml of n-hexane and 26.452 g of trimesoyl chloride were taken to prepare a n-hexane solution with a mass concentration of 4%. At room temperature (25°C), immerse the treated polysulfone ultrafiltration membrane in the aqueous solution for 5 minutes, take it out, immerse it in n-hexane solution, and take out the interfacial polymerization time for 2 minutes, take it out, wash the composite membrane with electrodeionized water, and then put it at 45°C The composite film was heat-treated for 15 minutes, and finally dried at room temperature. With mixed gas 90vol% CO 2 / 10vol%CH 4 Composite membranes were tested. When t...

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Abstract

The invention discloses a method for preparation of CO2 carrier- fixed complex film with interfacial polymerization, belonging to the technique for preparation of film. The method contains the following steps: using a sheet film of polysulfone or polyethersulfone or a hollow fibre film as the basilemma, treating the surface of basilemma with a sodium dodecyl sulfonate water solution; soaking the treated basilemma in a diethylenetriamine, triethylene tetraamine, tetraethylene pentamine or polyethylene polyamine water solution in room temperature, and then adding to a trimesoyl- chloride skellysolve B solution or isophthaloyl- chloride skellysolve B solution or trimesoyl- chloride and isophthaloyl- chloride skellysolve B solution to generate interfacial polymerization; purifying the complex film with ionic hydration and drying naturally or drying naturally after a definite thermal treatment. The prepared complex film has a separation factor of 40- 200 to the mixture of CO2 / CH4, and a penetration ratio of 1- 6* 10- 5cm3(STP) / cm2.s.cmHg of CO2. The process is simple and it is easy to operate.

Description

technical field [0001] The invention relates to a method for preparing and separating CO by interfacial polymerization 2 The invention relates to a method for fixing a carrier composite membrane, which belongs to the preparation technology of a gas separation composite membrane. Background technique [0002] Fixed carrier gas separation composite membrane is a new type of gas separation membrane, which has high permeability and selectivity at the same time. Compared with other types of carrier membranes - liquid membranes and ion exchange membranes, the fixed carrier composite membrane is not easy to lose, and its stability is greatly improved. Separation of CO 2 Gas immobilized carrier composite membranes are rare in research at home and abroad, and only a few researchers focus on preparing immobilized carrier composite membranes by dip coating or plasma polymerization. Interfacial polymerization is a simple and practical method for preparing ultrathin composite films. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D53/22C01B31/20C01B32/50
CPCY02C10/10Y02C20/40Y02P20/151
Inventor 王志赵卷王纪孝伊春海王世昌
Owner TIANJIN UNIV
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