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Separation membrane, preparation method and application thereof

A separation membrane and separation layer technology, which is applied in the field of separation membranes, can solve the problems of difficult preparation, poor durability of membrane separation membranes, etc., and achieve the effects of uniform crystal size, excellent performance, and simple and easy preparation methods

Active Publication Date: 2019-08-23
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a separation membrane capable of continuous preparation, simple method and high separation efficiency in order to overcome the problems existing in existing membrane materials such as difficulty in large-area preparation, membrane separation and membrane durability. Its preparation method and the application of the separation membrane in the oil-water separation process

Method used

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  • Separation membrane, preparation method and application thereof
  • Separation membrane, preparation method and application thereof
  • Separation membrane, preparation method and application thereof

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preparation example Construction

[0033] The present invention also provides the preparation method of above-mentioned separation membrane, and this method comprises 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 the presence of an organic solvent, the compound containing the M element is subjected to a contact reaction with the organic carboxylic acid, and the product after the contact reaction is separated from solid to liquid to obtain an inorganic-organic coordination compound seed crystal, wherein the Said M is an element of group IVB;

[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 dispersion prepared in step 1-2) and perform ultrasonic tr...

Embodiment 1

[0079] (1) Preparation of Zr-H 2 BDC Seed

[0080] 0.08g ZrCl 4 Add to 20ml DMF to disperse evenly, then add 0.057g terephthalic acid and 0.043g benzoic acid, and mix well under stirring. Then place it at 120°C for 24h. After cooling, the product was centrifuged, washed three times with DMF and deionized water, and then dried in an oven at 80°C to obtain a white seed crystal powder.

[0081] (2) Preparation of Zr-H 2 BDC seed solution

[0082] Add 25 mg of the obtained seed crystal powder into 50 ml of deionized water in a beaker, and disperse it uniformly by ultrasonication for 30 min at a frequency of 40 kHz to form a seed crystal dispersion.

[0083] (3) Preparation of Zr-H 2BDC seed film

[0084] Put the treated stainless steel mesh carrier (pore size 500 mesh, thickness 2 μm) in a beaker containing 25ml of seed dispersion, ultrasonicate for 30min at a frequency of 40kHz, and bake in an oven at 120°C for 2h, repeat this step 3 times, A continuous, uniform seed film...

Embodiment 2

[0097] (1) Preparation of Zr-H 2 BDC Seed

[0098] 0.08g ZrCl 4 Add to 20ml DMF to disperse evenly, then add 0.057g terephthalic acid and 0.043g benzoic acid, and mix well under stirring. Then place it at 120°C for 24h. After cooling, the product was centrifuged, washed three times with DMF and deionized water, and then dried in an oven at 80°C to obtain a white seed crystal powder.

[0099] (2) Preparation of Zr-H 2 BDC seed solution

[0100] Add 25 mg of the obtained seed crystal powder into 50 ml of deionized water in a beaker, and disperse it uniformly by ultrasonication for 30 min at a frequency of 40 kHz to form the seed crystal solution.

[0101] (3) Preparation of Zr-H 2 BDC seed film

[0102] Put the treated stainless steel mesh carrier (500 mesh in pore size and 2 μm in thickness) in a beaker containing 25ml of seed solution, ultrasonicate for 30min at a frequency of 40kHz, and put in an oven at 120°C for 2h. Repeat this step 3 times to obtain A continuous, u...

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Abstract

Relating to the field of separation membranes, the invention discloses a separation membrane, a preparation method of the separation membrane and application of the separation membrane in the oil-water separation process. The separation membrane comprises a substrate and a separation layer growing on the substrate, wherein the separation layer is formed by an inorganic-organic coordination compound, the inorganic element in the inorganic-organic coordination compound is selected from IVB group elements, and the organic ligand in the inorganic-organic coordination compound is organic carboxylicacid. The separation membrane provided by the invention has good thermal stability, chemical stability and durability, and has excellent oil-water separation performance.

Description

technical field [0001] The invention relates to the field of separation membranes, in particular to a separation membrane, a preparation method of the separation membrane and an application of the separation membrane in an oil-water separation process. Background technique [0002] As an extremely important energy source, petroleum plays an irreplaceable role in our daily life. With the rapid development of science and technology, people have made great progress in the exploration and refining of oil. However, the environmental pollution problems in the process of mining, transportation, production, and use cannot be ignored. Therefore, the preparation of oil-water separation materials and development is particularly important. Since the 1950s, membrane separation technology has entered the stage of industrial application. At the beginning, microfiltration membranes and ion exchange membranes were widely used, followed by reverse osmosis, ultrafiltration, and pervaporation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/02B01D67/00B01D17/022
CPCB01D71/022B01D71/025B01D71/027B01D17/02B01D67/0079B01D69/02B01D2325/36
Inventor 赵宇鑫薛铭刘全桢张健中陶彬张晓晶
Owner CHINA PETROLEUM & CHEM CORP
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