Metal-organic framework MIL-160 film, preparation method and application

A metal-organic framework, porous alumina technology, applied in organic chemistry, chemical instruments and methods, membrane technology, etc., can solve the problems of low paraxylene flux, cracks, pinhole intergranular, etc., and achieve high selective separation performance Effect
CN108889132AActive Publication Date: 2018-11-27EAST CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EAST CHINA NORMAL UNIVERSITY
Publication Date
2018-11-27

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Abstract

The invention discloses a metal-organic framework MIL-160 film, a preparation method and an application, and belongs to the technical field of preparation of functional film separating materials. Themetal-organic framework MIL-160 film has excellent chemical stability and hydrothermal stability, the hole diameter of the film is about 0.6 nanometer, and the size of the hole diameter is equal to that of the dynamics diameter of a xylene homologue. According to the method, a porous aluminum oxide substrate is functionally modified through dopamine, polydopamine is modified on the surface of theporous substrate, MIL-160 particle 'capturing' and 'adsorbing' capacity of the surface of the porous substrate is enhanced, so that nucleating and growing of the MIL-160 film on the surface of the substrate are facilitated, and the uniform and compact MIL-160 film is prepared and has high separation performance. The MIL-160 film prepared by the method is used for separation of xylene geometric isomers, the xylene permeation flux of the film is 258-563g*m<-2>*h<-1>, and the p-xylene / o-xylene separation coefficient of the film is 16.8-38.5 at the pervaporation temperature of 25-100 DEG C.
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Description

technical field

[0001] The invention belongs to the field of preparation of membrane separation materials, in particular to a method for synthesizing metal organic framework membranes widely used in gas separation and liquid separation, and in particular to provide a uniform and dense membrane with excellent xylene isomerism prepared by functional modification of dopamine Metal-organic framework membrane MIL-160 membrane with volume separation performance and its preparation method. Background technique

[0002] Xylene is the main component of C8 aromatics, and there are three isomers (p-xylene PX, o-xylene OX, m-xylene MX). P-xylene is an important chemical raw material for the synthesis of polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). Para-xylene, as part of BTX aromatics (benzene, toluene and xylene isomers), must be separated from ortho-, meta-, and ethylbenzene by distillation, adsorption, crystallization, and reaction processes. However, due ...

Claims

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