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Inorganic-organic coordination compound separation membrane and production method and application thereof

A coordination compound and compound technology, applied in the field of separation membranes, can solve the problems of difficult preparation, poor membrane separation and durability, and achieve the effects of uniform crystal size, excellent performance, and good thermal and chemical stability.

Active Publication Date: 2019-08-20
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the problems of existing membrane materials such as difficulty in large-area preparation, poor membrane separation and membrane durability, and provide a continuous preparation, simple method, high separation efficiency, chemical stability and thermal stability. Good separation membrane, preparation method thereof and application of the separation membrane in oil-water separation process

Method used

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  • Inorganic-organic coordination compound separation membrane and production method and application thereof
  • Inorganic-organic coordination compound separation membrane and production method and application thereof
  • Inorganic-organic coordination compound separation membrane and production method and application thereof

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preparation example Construction

[0033] The present invention also provides a preparation method for the above-mentioned inorganic-coordination compound separation membrane, the method comprising the following steps:

[0034] 1) forming a seed film on the surface of the substrate;

[0035] 2) Secondary growth on the seed film to form a separation layer.

[0036] In the preparation method of the present invention, preferably, step 1) includes:

[0037] 1-1) In a polar solvent, a compound containing M element is subjected to a contact reaction with the organic ligand, and the product after the contact reaction is separated from solid to liquid to obtain an inorganic-organic coordination compound seed crystal, wherein the The M is selected from group IIB elements, and the organic ligand is an imidazole compound;

[0038] 1-2) dispersing the inorganic-organic coordination compound seed crystals obtained in step 1-1) in water to obtain an aqueous dispersion;

[0039] 1-3) Put the substrate into the aqueous disp...

Embodiment 1

[0075] (1) Preparation of Zn(mim) 2 seed crystal

[0076] Add 1.5g of zinc nitrate hexahydrate and 20g of 2-methylimidazole into 90ml of deionized water to disperse evenly, and stir and react at 25°C for 30min. The product was centrifuged, washed three times with deionized water, and dried at 60°C to obtain a white seed crystal powder.

[0077] (2) Preparation of Zn(mim) 2 Seed solution

[0078] 0.2 g of the obtained seed crystal powder was added into 10 ml of deionized water, and was ultrasonicated for 30 min at a frequency of 40 kHz to uniformly form a seed crystal dispersion.

[0079] (3) Preparation of Zn(mim) 2 Seed film

[0080] Immerse the treated stainless steel mesh (800 mesh in pore size and 2 μm in thickness) in the dispersed seed crystal dispersion liquid, ultrasonically treat it at a frequency of 30 kHz for 10 min, and dry it at 120 ° C for 2 h, repeat the above dipping and ultrasonic 1. The drying step is performed twice to obtain a continuous and uniform s...

Embodiment 2

[0093] Step (1) prepares Zn(mim) 2 Seed and step (2) prepare Zn(mim) 2 The seed solution was carried out according to the method of Example 1.

[0094] (3) Preparation of Zn(mim) 2 Seed film

[0095] Immerse the treated stainless steel mesh (400 mesh in pore size and 2 μm in thickness) in the dispersed seed crystal dispersion liquid, ultrasonically treat it for 10 min at a frequency of 30 kHz, and dry it at 120 °C for 2 h, repeat the above dipping and ultrasonic 1. The drying step is performed twice to obtain a continuous and uniform seed crystal film formed on the stainless steel mesh.

[0096] (4) Preparation of Zn(mim) 2 Coordination Compound Separation Membrane

[0097] Dissolve 0.11g of zinc acetate dihydrate in 2ml of deionized water, dissolve 1.150g of 2-methylimidazole in 18ml of deionized water, mix the above two solutions and put the stainless steel mesh coated with the seed crystal film vertically into the mixed solution In the reaction at 25°C for 24h, Zn(mim...

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Abstract

The invention relates to the field of separation membranes, and discloses an inorganic-organic coordination compound separation membrane, a production method of the separation membrane and applicationof the separation membrane in an oil-water separation process. The separation membrane comprises a substrate and a separation layer which grows on the substrate, wherein the separation layer is formed by an inorganic-organic coordination compound, an inorganic element in the inorganic-organic coordination compound is selected from IIB family elements, and an organic ligand in the inorganic-organic coordination compound is an imidazole compound. The provided separation membrane is good in thermal stability, chemical stability and durability and excellent in oil-water separation performance.

Description

technical field [0001] The invention relates to the field of separation membranes, in particular to an inorganic-coordination compound separation membrane, a preparation method of the separation membrane and an application of the separation membrane in the oil-water separation process. Background technique [0002] Oily sewage comes from a wide range of sources, such as petrochemical, petroleum exploration, mechanical processing, transportation, leather, textile, food, medicine and other industries. Every year, a large amount of oil and toxic pollutants flow into the ocean through various channels, especially oil and harmful industrial poison leakage accidents. However, the transportation, storage and use of petroleum are ubiquitous. Therefore, oil-water separation materials and technologies have important scientific and technological significance and broad application prospects in the fields of environmental governance and oil recovery and reuse. [0003] At present, the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D69/02B01D67/00B01D17/022
CPCB01D71/06B01D69/02B01D67/0079B01D17/02B01D2325/36
Inventor 赵宇鑫薛铭刘全桢张健中陶彬宋明秋
Owner CHINA PETROLEUM & CHEM CORP
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