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High-flux emulsion separation composite material and preparation method and application thereof

An emulsion separation, high-throughput technology, applied in separation methods, liquid separation, immiscible liquid separation, etc., can solve problems such as limiting the large-scale application of superwetting separation membranes, reducing separation flux, and achieving good mechanical stability. performance, high flexibility, improved separation efficiency

Active Publication Date: 2020-04-28
宁夏惟远新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing super-wetting separations are nano-scale small pore structures. Too small pores will easily reduce the separation flux, which greatly limits the large-scale application of super-wetting separation membranes in the field of oil-water separation.

Method used

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  • High-flux emulsion separation composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Add 10 g of cotton fiber per liter of water at room temperature, mechanically crush and disperse it to obtain cotton fiber pulp; calculate 50 mL of cotton fiber pulp per square centimeter, put a part of cotton fiber pulp into a vacuum filtration device and vacuum filter it into Membrane, to obtain the membrane layer required for high-flux emulsion separation materials;

[0025] (2) Spread the film layer prepared in step (1) on the bottom of the beaker, and pour the cotton fiber slurry on the surface of the film layer according to 10mL of cotton fiber slurry per square centimeter, freeze at -60°C to form a solid mixture, and freeze-dry porous layer / membrane composite;

[0026] (3) Prepare a N,N-dimethylformamide (DMF) solution of polycaprolactone with a mass fraction of 0.3%, wet the porous layer / film layer composite obtained in step (2), and dry at room temperature A high-throughput emulsion separation material is obtained.

[0027] Calculate the thickness and por...

Embodiment 2

[0030] (1) Add 10 g of sisal fiber per liter of water at room temperature, and mechanically pulverize it to obtain sisal fiber pulp; according to 20 mL of sisal fiber pulp per square centimeter, put a part of the sisal fiber pulp into a vacuum filtration device for vacuum pumping Filtrate into a membrane to obtain the membrane layer required for high-throughput emulsion separation materials;

[0031] (2) Spread the film layer prepared in step (1) on the bottom of the beaker, and pour the sisal fiber slurry on the surface of the film layer according to 5mL of sisal fiber slurry per square centimeter, and freeze at -40°C to form a solid mixture. Freeze-drying the porous layer / membrane composite;

[0032] (3) Prepare a polycaprolactone DMF solution with a mass fraction of 0.5%, wet the porous layer / membrane layer composite obtained in step (2), and dry it at room temperature to obtain a high-flux emulsion separation material.

[0033] Under the same test conditions as in Example...

Embodiment 3

[0036] (1) Add 100 g of viscose fiber per liter of water at room temperature, and mechanically pulverize it to obtain viscose fiber pulp; according to 10 mL of viscose fiber pulp per square centimeter, pour a part of viscose fiber pulp into a vacuum filtration device, and vacuum Filtrate into a membrane to obtain the membrane layer required for high-throughput emulsion separation materials;

[0037] (2) Spread the film layer prepared in step (1) on the bottom of the beaker, and pour the viscose fiber slurry on the surface of the film layer at a rate of 20 mL of viscose fiber slurry per square centimeter, and freeze at -80°C to form a solid mixture. Freeze-drying the porous layer / membrane composite;

[0038] (3) Prepare a polycaprolactone DMF solution with a mass fraction of 0.8%, wet the porous layer / membrane layer composite obtained in step (2), and dry it at room temperature to obtain a high-flux emulsion separation material.

[0039] Under the same test conditions as in Ex...

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Abstract

The invention belongs to the technical field of oil-water separation, and particularly relates to a high-flux emulsion separation composite material and a preparation method and application thereof. The emulsion separation material provided by the invention is composed of a porous layer with high tortuosity and a membrane layer with a large-aperture structure, a porous layer / membrane layer composite material with good mechanical stability is formed after compounding, and the oil-water selectivity is improved through hydrophobic modification. The preparation method provided by the invention hasrelatively low requirements on fiber types, expands fiber sources, and has relatively high flexibility; and the high-flux emulsion separation composite material is simple in composition, convenient to prepare and controllable in structure, has relatively high emulsion separation flux, and has a wide application prospect in the field of high-flux emulsion separation.

Description

technical field [0001] The invention belongs to the technical field of oil-water separation, and in particular relates to a high-flux emulsion separation composite material and its preparation method and application. Background technique [0002] Petroleum is an important energy source and an indispensable driving force for economic development. However, while the petrochemical industry continues to grow, the discharge of oily wastewater and the occurrence of oil spills are becoming more and more serious. This is not only the pollution of water resources, but also the waste of precious oil, and it is also a great harm to the ecological environment. The effective separation of oil-water mixture is not only the protection of the environment, but also the reuse of resources, which can alleviate the current situation of resource shortage. How to find an effective way to separate oil-water mixtures is a difficult problem that needs to be further explored. [0003] Superwetting ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D17/02
CPCB01D67/00B01D67/0002B01D17/085B01D2323/50B01D2323/46
Inventor 张涛岳学杰王明友邱凤仙杨冬亚戴玉婷
Owner 宁夏惟远新能源有限公司
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