Separation membrane, preparation method, aviation kerosene dehydration and purification method and application

A technology of aviation kerosene and separation membrane, applied in the direction of mechanical dehydration/demulsification, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of emulsified water adhesion, pollution, attenuation, membrane pore clogging, separation performance, etc. , to achieve enhanced separation performance, efficient separation and purification, and high separation throughput

Inactive Publication Date: 2021-03-19
CSSC SYST ENG RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the chemical composition, traditional separation membranes usually do not have super-hydrophobic properties. When separating aviation kerosene, they are easily adhered and polluted by emulsified water, resulting in clogging of membrane pores and rapid attenuation of separation performance.
At the same time, the pore ratio of traditional separation membranes is usually low, resulting in low separation flux of small-pore separation membranes. There are "contradictory" problems in separation membranes in terms of high separation flux and high separation efficiency, and it is difficult to achieve aviation kerosene at the same time. fast and efficient separation

Method used

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  • Separation membrane, preparation method, aviation kerosene dehydration and purification method and application
  • Separation membrane, preparation method, aviation kerosene dehydration and purification method and application
  • Separation membrane, preparation method, aviation kerosene dehydration and purification method and application

Examples

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preparation example Construction

[0047] The present invention provides a kind of preparation method of oil-water separation membrane, and this method comprises the following steps:

[0048] Step one, any one or Other polymer film-forming materials and fluorine-containing water repellents with the same main chain and different side chains, such as heptadecafluorodecyltrimethoxysilane, heptadecafluorodecyltrichlorosilane, tridecafluorooctyltriethoxysilane, Any one of perfluorooctyltrichlorosilane and perfluorododecylmercaptan, dissolved in N,N-dimethylformamide, N,N-dimethylacetamide, N-methylpyrrolidone, tris In organic solvents of any one of methyl chloride, dioxane, m-cresol, diphenyl sulfone, diphenyl ether, tetrahydrofuran and dimethyl sulfoxide, stir at 70-100°C for 36-60 hours to form a uniform high Molecular solution; the concentration of polymer film-forming material is 0.01-1g / mL; the concentration of fluorine-containing water repellent is 0.0001-1g / mL;

[0049]In order to obtain a uniform separatio...

Embodiment 1

[0068] Weigh a certain amount of polyvinylidene fluoride and heptadecafluorodecyltrimethoxysilane, dissolve in N,N-dimethylformamide organic solvent, wherein the concentration of polyvinylidene fluoride is 0.1g / mL, seventeen The concentration of fluorodecyltrimethoxysilane was 0.005g / mL, stirred at 85°C for 48h, and prepared into a homogeneous polymer solution. The above solution was spun into a film by electrospinning at room temperature, the relative air humidity was 70% during spinning, the spinning voltage difference was 12kV, the spinning distance was 10cm, and the spinner was spun at a spinning injector speed of 1.5mL / h. Silk time is 1h. After spinning, the porous membrane was dried at 60° C. for 24 h to obtain the desired separation membrane.

[0069] Scanning electron microscope image of the separation membrane see figure 1 , it can be seen that the separation membrane has a porous structure connected by ball filaments, which is composed of micro-nano balls and micro...

Embodiment 2

[0071] Different from Example 1, the spinning time of this example is 10h.

[0072] Scanning electron microscope image of the separation membrane see Figure 5 , it can be seen that the separation membrane also has a porous structure connected by filaments, and the diameter of the micro-nano balls and micro-nano fibers does not change much when the spinning time increases, but due to the increase in the density of the micro-nano balls and micro-nano fibers, The pore diameter of the separation membrane is reduced to 0.9-1.0 μm. After testing, the water contact angle of the separation membrane is 161°, the rolling angle is 3°, and the aviation kerosene contact angle is 0°, indicating that the separation membrane has superhydrophobic and superoleophilic properties.

[0073] The separation membrane is used for the water removal and purification test of emulsified aviation kerosene with a water content of 30000ppm. The photos of the emulsified aviation kerosene before and after th...

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Abstract

The invention discloses a preparation method of an oil-water separation membrane, which comprises the steps of dissolving a hydrophobic polymer film-forming material and a fluorine-containing water repellent agent in an organic solvent, and stirring at the temperature of 70-100 DEG C for 36-60 hours to form a uniform polymer solution; under the conditions that the relative air humidity is 50-100%,the spinning voltage difference is 5-50 kV, the spinning distance is 5-30 cm, the pushing speed of a spinning injector is 1.2-1.8 mL/h, and the spinning time is 0.1-100 h, spinning the polymer solution into a porous membrane through electrostatic spinning; and drying the porous membrane at the temperature of 60-80 DEG C for 1-24 hours to obtain the separation membrane. The invention also discloses a super-hydrophobic and super-oleophylic oil-water separation membrane. The separation membrane has a ball-wire connected structure and an adjustable membrane aperture. The separation membrane prepared by the invention can effectively separate aviation kerosene with high emulsification degree, the water content in the separated aviation kerosene is lower than 10ppm, and the flux reaches 20m<3>/(m<2>hbar).

Description

technical field [0001] The invention belongs to the technical field of water removal and purification of aviation kerosene, and relates to a separation membrane, a preparation method and an application in water removal and purification of aviation kerosene. Background technique [0002] The cleanliness of jet fuel, namely aviation kerosene, directly determines the performance and safe operation of the jet engine, and then determines the stability and safety of the aircraft during flight. Aviation kerosene is easily mixed with water and impurities during production, transportation, loading and unloading, storage and distribution, and the water content of aviation kerosene at the bottom of large oil tanks is very high. The emulsified water in aviation kerosene will aggravate the growth of microorganisms and the corrosion of metal components of jet engines. The adsorption of microorganisms and rust on filters and nozzles will increase the oil suction resistance of oil pumps, re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D61/40C10G33/06B01D17/04
CPCB01D67/0002B01D69/02B01D61/40C10G33/06B01D17/04B01D2323/39B01D2325/38C10G2300/1051
Inventor 董贺峰谷美邦胡婕李文鹤刘松万然刘绪儒侯振兴
Owner CSSC SYST ENG RES INST
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