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Metal-organic framework material separation membrane as well as preparation method and application thereof

An organic framework and separation membrane technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problem of difficult to obtain MOFs separation functional layer, weak combination of separation functional layer and basement membrane, specific material selectivity Difficult to improve and other problems, to achieve the effects of excellent chemical dissolution resistance, high temperature resistance, large flux and separation coefficient

Active Publication Date: 2022-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems existing in the prior art that it is difficult to obtain a continuous and complete MOFs separation function layer, or the separation function layer is not firmly combined with the base membrane and is prone to fall off and defects, and the obtained separation membrane flux is small and the separation coefficient is low. Low, difficult to improve the selectivity of specific substances, discontinuous preparation process, etc., through the specific pretreatment of the basement membrane and the method of in situ growth reaction to construct a metal-organic framework material separation with a continuous intercalation structure Functional layer, preparing a functional layer on the surface of the membrane with a special microscopic geometry, and realizing the regulation of its structure and chemical composition

Method used

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  • Metal-organic framework material separation membrane as well as preparation method and application thereof
  • Metal-organic framework material separation membrane as well as preparation method and application thereof
  • Metal-organic framework material separation membrane as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0191] (1) Solution required for MOFs membrane preparation

[0192] N-methylpyrrolidone, terephthalic acid, zirconium tetrachloride and pure water are mixed according to the molar ratio of 400:1:1:0.01 and fully stirred to obtain the solution required for the preparation of the MOFs membrane.

[0193] (2) Basement membrane pretreatment

[0194] (a) Mix polyacrylic acid, partially hydrolyzed polyacrylic acid, polyvinyl alcohol and zirconium tetrachloride at a molar ratio of 2:1 with a mass concentration of 1000 mg / L, and stir for 1 hour to obtain a reacted solution;

[0195] (b) After the polypropylene hollow fiber base membrane with a pore size of 500nm is washed with water, washed with ethanol and dried, the ratio of the surface area of ​​the base membrane to the solution described in (a) is 1m 2 / L (that is, the film with a surface of 1 square meter is coated with 1L of the preparation solution described in step (a)), the solution generated in (a) is coated on the surface o...

Embodiment 2

[0202] The difference from Example 1 is only that in (2) basement membrane pretreatment, according to the ratio of the basement membrane surface area and the solution described in (a), it is 0.1m 2 / L (that is, the film with a surface of 0.1 square meters is coated with 1 L of the solution prepared in step (a)), and the solution generated in (a) is coated on the surface of the dried base film.

[0203] The performance test data of the membrane is shown in Table 1. The performance test data of the membrane show that the flux of nitrogen gas at 0.1Mpa can reach 2.01×10 -6 mol / (m 2 ·s·Pa), while the flux of propylene gas is only 0.18×10 - 6 mol / (m 2 s Pa), the nitrogen / propylene separation coefficient is 11.17.

Embodiment 3

[0205] The difference with Example 1 is only that in (2) basement membrane pretreatment, according to the ratio of the basement membrane surface area and the solution described in (a), be 5m 2 / L (that is, a film with a surface of 5 square meters is coated with 1 L of the solution prepared in step (a)), and the solution generated in (a) is coated on the surface of the dried base film.

[0206] The performance test data of the membrane is shown in Table 1. The performance test data of the membrane show that the flux of nitrogen gas at 0.1Mpa can reach 10.41×10 -6 mol / (m 2 ·s·Pa), while the flux of propylene gas is only 1.206×10 - 6 mol / (m 2 s Pa), the nitrogen / propylene separation coefficient is 8.63.

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Abstract

The invention provides a metal-organic framework material separation membrane and a preparation method of the metal-organic framework material separation membrane. The metal-organic framework material separation membrane comprises a base membrane and a metal-organic framework material functional layer, and the metal-organic framework material functional layer structurally comprises polyhedral structures which are mutually embedded. The preparation method of the metal-organic framework material separation membrane comprises the following steps: (1) preparing a solution containing a first organic solvent, an organic ligand, a metal compound and an auxiliary agent; (2) pretreating the base film, and introducing metal atoms in the metal compound in the step (1) to the surface of the base film; and (3) mixing the base membrane pretreated in the step (2) with the solution in the step (1) to obtain a first mixture, and heating the first mixture to react to prepare the metal-organic framework material separation membrane. The organic gas separation membrane prepared by the invention has the properties of high separation coefficient, large flux, adhesion resistance, pollution resistance and the like in the application process.

Description

technical field [0001] The invention relates to a metal-organic framework material separation membrane and a method for preparing the metal-organic framework material separation membrane, belonging to the technical field of organic gas separation membrane preparation. Background technique [0002] Gas membrane separation technology is a new technology that uses the high-efficiency selective permeability of membrane materials to organic matter to realize the separation of organic matter from the gas phase. It has continuous process, no heat release, no secondary pollution, high recovery rate, low energy consumption and advantages of miniaturization. It is currently the mainstream technology for organic matter separation and volatile organic compound (VOCs) treatment in developed countries, and it has a very wide range of applications in the fields of environmental protection, chemical industry, and biopharmaceuticals. [0003] Most of the existing organic gas separation memb...

Claims

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Application Information

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IPC IPC(8): B01D69/02B01D71/06B01D67/00B01D53/22
CPCB01D69/02B01D53/228B01D71/76B01D67/0006C07C7/144Y02A20/131C08G83/001B01D69/12B01D71/028B01D67/0051B01D2323/30B01D67/0088B01D71/70B01D2257/7022C07C9/15B01D2323/081B01D67/00933B01D2325/02834B01D71/262B01D2325/02833B01D71/261B01D2325/02832B01D2325/02831B01D67/0079B01D67/0083B01D69/08B01D2323/10B01D2323/385B01D2325/22B01D2325/24B01D2325/30B01D2325/38C07F7/003B01D71/301
Inventor 吴长江魏昕郦和生张新妙孙杰王成鸿王玉杰孟凡宁
Owner CHINA PETROLEUM & CHEM CORP
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