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Preparation method of MOFs tube type hybrid membrane for separating aromatic hydrocarbons/alkyl hydrocarbons

A technology for separating aromatic hydrocarbons and hybrid membranes, applied in the field of membrane separation, can solve the problems of high temperature resistance, high manufacturing cost, brittleness and difficult processing, etc., and achieve the effect of improving swelling resistance and reducing feeding temperature.

Inactive Publication Date: 2014-10-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although organic polymer membranes have many advantages, they have disadvantages such as low temperature resistance and easy swelling; while inorganic membranes are resistant to corrosion and high temperature, but they also have disadvantages such as high manufacturing costs, brittleness and difficulty in processing, and single surface groups.

Method used

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  • Preparation method of MOFs tube type hybrid membrane for separating aromatic hydrocarbons/alkyl hydrocarbons
  • Preparation method of MOFs tube type hybrid membrane for separating aromatic hydrocarbons/alkyl hydrocarbons
  • Preparation method of MOFs tube type hybrid membrane for separating aromatic hydrocarbons/alkyl hydrocarbons

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with hydroxyl used is polyvinyl alcohol (PVA, molecular weight is 16000), and the metal source is copper acetate hydrate ((CH 3 COO) 2 Cu·H 2 O, the molecular weight is 199.65), and the organic ligand is trimesic acid (C 9 h 6 0 6 , the molecular weight is 210), the solvent of the metal source and the organic ligand is H at a ratio of 1:1:1 2 O, C 2 h 5 The mixed solution of OH and DMF, the solvent of polyvinyl alcohol is H 2 O.

[0027] Preparation conditions and methods:

[0028] (1) Prepare HKUST-1 by solvothermal method. Dissolve 5 g of copper acetate hydrate and 2.5 g of trimesic acid in H at a ratio of 1:1:1 2 O, C 2 h 5 OH, DMF solvent, prepared into a solution, static defoaming. It was stirred a...

Embodiment 2

[0036]Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with hydroxyl used is polyvinyl alcohol (PVA, molecular weight is 16000), and the metal source is copper acetate hydrate ((CH 3 COO) 2 Cu·H 2 O, the molecular weight is 199.65), and the organic ligand is trimesic acid (C 9 h 6 0 6 , the molecular weight is 210), the solvent of the metal source and the organic ligand is H at a ratio of 1:1:1 2 O, C 2 h 5 The mixed solution of OH and DMF, the solvent of polyvinyl alcohol is H 2 O.

[0037] Preparation conditions and methods:

[0038] (1) Prepare HKUST-1 by solvothermal method. Dissolve 5 g of copper acetate hydrate and 2.5 g of trimesic acid in H at a ratio of 1:1:1 2 O, C 2 h 5 OH, DMF solvent, prepared into a solution, static defoaming. It was stirred at...

Embodiment 3

[0046] Aluminum oxide (Al 2 o 3 ) material, in the form of a tubular ultrafiltration membrane with a membrane pore size of 0.1-0.2 μm and a membrane area of ​​28 cm 2 , the silane coupling agent used in pretreatment is 3-aminopropyl-trimethoxysilane, the polymer with hydroxyl used is polyvinyl alcohol (PVA, molecular weight is 16000), and the metal source is copper acetate hydrate ((CH 3 COO) 2 Cu·H 2 O, the molecular weight is 199.65); the organic ligand is trimesic acid (C 9 h 6 0 6 , the molecular weight is 210), the solvent of the metal source and the organic ligand is H at a ratio of 1:1:1 2 O, C 2 h 5 The mixed solution of OH and DMF, the solvent of polyvinyl alcohol is H 2 O.

[0047] Preparation conditions and methods:

[0048] (1) Prepare HKUST-1 by solvothermal method. Dissolve 5 g of copper acetate hydrate and 2.5 g of trimesic acid in H at a ratio of 1:1:1 2 O, C 2 h 5 OH, DMF solvent, prepared into a solution, static defoaming. It was stirred at ro...

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Abstract

A preparation method of an MOFs tube type hybrid membrane for separating aromatic hydrocarbons / alkyl hydrocarbons, and belongs to the technical field of membrane separation. The method comprises the steps: preparing MOFs particles by a solvent thermal method; preparing an MOFs / polymer membrane liquid by a co-mixing method, carrying out ultrasonic dispersion, and standing for defoaming; compounding the MOFs / polymer on the outer surface of a ceramic porous membrane modified by a silane coupling agent through a dynamic compression method, and forming a thin membrane separation layer; and drying the hybrid membrane for 0.1-4 h at the temperature of 30-120 DEG C, to enhance the stability of the separation layer. The invention provides the new preparation method of the MOFs hybrid membrane for separating the aromatic hydrocarbons / alkyl hydrocarbons, the process is simple, and the prepared hybrid membrane has good pervaporation performance, and the mechanical strength is improved to a larger degree.

Description

technical field [0001] The invention relates to a method for preparing a MOFs tubular hybrid membrane for separating aromatics / alkanes, and belongs to the technical field of membrane separation. Background technique [0002] The separation of aromatic / alkane mixtures is of great significance in the fields of petrochemical and environmental protection. The volatilization of aromatic hydrocarbons such as benzene in fuel pollutes the environment and damages public health. In the process of producing ethylene from petroleum cracking, the aromatic components in it cannot be directly converted into olefins, and coking will affect heat transfer. In order to ensure high production efficiency, the content of aromatics in petroleum must be reduced. In addition, many important chemical crude products are mixtures of aromatics / alkanes, which also need to be separated and purified to achieve product specifications. Benzene and xylene are raw materials for the manufacture of various syn...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D67/00B01D69/04
Inventor 李建荣张悦王乃鑫纪树兰张蓉汪林吴桐刘天骄
Owner BEIJING UNIV OF TECH
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