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High oil stain resistance oil-water separation membrane and its preparation method and application

A technology of oil-water separation membrane and oil pollution, which is applied in separation methods, liquid separation, chemical instruments and methods, etc. It can solve the problems of low anti-pollution performance, high membrane separation pressure, and low membrane flux.

Active Publication Date: 2018-10-30
WUXI LAHIGH ENG DESIGN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing membrane separation technology, oil-water separation membranes generally have the disadvantages of low anti-pollution performance, low membrane flux, high membrane separation pressure, and large pressure loss.

Method used

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  • High oil stain resistance oil-water separation membrane and its preparation method and application
  • High oil stain resistance oil-water separation membrane and its preparation method and application
  • High oil stain resistance oil-water separation membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of fluorine-containing resin: take 8 g of methacrylic acid (MAA), 13 g of n-butyl acrylate (BA), 18 g of fluorine-containing monomer dodecafluoroheptyl methacrylate (G04), and azobisisobutyronitrile ( AIBN) 1g, propylene glycol methyl ether acetate (PMA) 60g;

[0037] Add 40% propylene glycol methyl ether acetate into the three-necked flask, and raise the temperature of the liquid in the bottle to 70°C under the stirring of the mechanical stirring blade;

[0038] 20% propylene glycol methyl ether acetate, 30% methacrylic acid, 30% n-butyl acrylate, 40% azobisisobutyronitrile and 50% fluorine-containing monomer dodecafluoroheptyl methacrylate Mix evenly to make the first mixed solution, drop the first mixed solution into the three-necked flask with a dropping funnel, continue to react for 1.5 hours after the dropwise addition, and keep the liquid temperature in the bottle at 70°C;

[0039] 20% propylene glycol methyl ether acetate, 70% methacrylic acid, ...

Embodiment 2

[0046] (1) Preparation of fluorine-containing resin: Take 6 g of methacrylic acid (MAA), 15 g of n-butyl acrylate (BA), 25 g of fluorine-containing monomer dodecafluoroheptyl methacrylate (G04), and azobisisobutyronitrile ( AIBN) 2g, propylene glycol methyl ether acetate (PMA) 52g;

[0047] Add 35% propylene glycol methyl ether acetate into the three-necked flask, and raise the temperature of the liquid in the bottle to 65°C under the stirring of the mechanical stirring blade;

[0048] 25% propylene glycol methyl ether acetate, 35% methacrylic acid, 35% n-butyl acrylate, 45% azobisisobutyronitrile and 45% fluorine-containing monomer dodecafluoroheptyl methacrylate Mix evenly to make the first mixed solution, drop the first mixed solution into the three-necked flask with a dropping funnel, continue to react for 2 hours after the dropwise addition, and keep the liquid temperature in the bottle at 65°C;

[0049] 25% propylene glycol methyl ether acetate, 65% methacrylic acid, 65...

example 3

[0056] (1) Preparation of fluorine-containing resin: take 15 g of methacrylic acid (MAA), 10 g of n-butyl acrylate (BA), 30 g of fluorine-containing monomer dodecafluoroheptyl methacrylate (G04), and azobisisobutyronitrile ( AIBN) 3g, propylene glycol methyl ether acetate (PMA) 42g;

[0057] Add 45% propylene glycol methyl ether acetate into the three-necked flask, and raise the temperature of the liquid in the bottle to 75°C under the stirring of the mechanical stirring blade;

[0058] 15% propylene glycol methyl ether acetate, 25% methacrylic acid, 25% n-butyl acrylate, 35% azobisisobutyronitrile and 55% fluorine-containing monomer dodecafluoroheptyl methacrylate Mix evenly to make the first mixed solution, drop the first mixed solution into the three-necked flask with a dropping funnel, continue to react for 1 hour after the dropwise addition, and keep the temperature of the liquid in the bottle at 75°C;

[0059] 15% propylene glycol methyl ether acetate, 75% methacrylic a...

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Abstract

The invention provides an oil-water separation membrane with high oil stain resistance, which has a porous structure and is super-hydrophilic and super-oleophobic. The contact angle of water on the surface of the film is 3-10 degrees while the contact angle of oil liquid under water is 140-165 degrees. The invention also discloses a preparation method of the membrane. The method particularly includes the steps of preparing fluorine-containing resin, preparing a membrane material, and performing scrape coating to form the membrane. The invention also provides an application of the membrane in separation of an oil-water mixture system. The membrane is good in oil removal effect, strong in oil stain resistance, high in film flux and low in separation pressure. The membrane allows low-pressure operations, is low in energy consumption and cost, and has excellent oil removal effects when being applied in various types of wastewater.

Description

technical field [0001] The invention relates to a highly oil-pollution-resistant oil-water separation membrane and a preparation method and application thereof, belonging to the technical field of sewage treatment. Background technique [0002] Oily sewage comes from petrochemical industry, oil exploration, mechanical processing, residential life and ocean freighters, etc. Every year, more than 10 million tons of oil in the world flow into ocean surface runoff through various channels. Oily sewage has a high chemical oxygen demand (COD) and is very serious for environmental pollution. Therefore, it is of great significance to separate oil and water to prevent oil from being discharged into the environmental water body and causing environmental pollution. [0003] There are four forms of oil in water: floating oil, dispersed oil, emulsified oil and dissolved oil. The particle size of slick oil is generally greater than 100 μm, which can be removed by natural floating; the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D17/022
CPCB01D17/02
Inventor 王晔刘正锁陈梅
Owner WUXI LAHIGH ENG DESIGN
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