Preparation method of low-temperature anti-adhesive aircraft de-icing and anti-icing liquid

An anti-icing liquid and anti-sticking technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of short duration of effect, thickening and sedimentation, large consumption, etc., and achieve the effect of reducing freezing point.

Inactive Publication Date: 2018-10-12
刘凡领
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that the current aircraft deicing and anti-icing fluid mainly has a short duration of effect, and cannot achieve long-term deicing effect after use, resulting in a large consumption, and the aircraft deicing and anti-icing fluid is Viscosification and sedimentation are prone to occur at low temperatures to produce hydration gels, which can easily cause short-term bonding of aircraft doors and elevators and cause them to be stuck. A preparation method for low-temperature anti-sticking aircraft deicing and anti-icing fluid is provided.

Method used

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Examples

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example 1

[0027] Weigh 600g of potatoes, put them into a stone mill and grind for 3 hours to obtain potato residues, put the potato residues into a plastic basin, add 1000mL of water and 500mL of sodium hydroxide solution with a mass fraction of 8% to the plastic basin, and heat at 90°C After stirring for 2 hours under the same conditions, the potato slurry was obtained, and the potato slurry was placed in a centrifugal disperser, centrifuged at a speed of 4000r / min for 10 minutes, and the supernatant was removed to obtain the lower filter residue; the above filter residue was placed in a beaker, and deionized water After washing the filter residue 3 times, add 200mL of sodium chlorite solution with a mass fraction of 20g / mL to the beaker, adjust the pH to 4.8 with a glacial acetic acid solution with a mass fraction of 90%, heat the beaker to 70°C, and keep it warm. After 2 hours, delignified fibers were obtained, and the delignified fibers were mixed with hydrochloric acid with a mass f...

example 2

[0029] Weigh 650g of potatoes, put them into a stone mill and grind them for 3.5h to obtain potato residues, put the potato residues into a plastic basin, add 1100mL of water and 600mL of 8% sodium hydroxide solution into the plastic basin, and set the temperature at 95 After stirring for 2.5 hours under the condition of ℃, the potato slurry was obtained, and the potato slurry was placed in a centrifugal disperser, centrifuged at a speed of 4500r / min for 13min, and the supernatant was removed to obtain the filter residue of the lower layer; the above filter residue was placed in a beaker and used to After washing the filter residue with ion water for 4 times, add 250 mL of sodium chlorite solution with a mass fraction of 24 g / mL to the beaker, adjust the pH to 5.0 with a glacial acetic acid solution with a mass fraction of 90%, and heat the beaker to 75 °C. After 2.5 hours of heat preservation treatment, delignified fibers are obtained. Mix the delignified fibers with hydrochlo...

example 3

[0031] Weigh 700g of potatoes, put them into a stone mill and grind them for 4 hours to obtain potato residues, put the potato residues into a plastic basin, add 1200mL of water and 700mL of 8% sodium hydroxide solution into the plastic basin, and heat at 100°C After stirring for 3 hours under the same conditions, the potato slurry was obtained, and the potato slurry was placed in a centrifugal disperser, centrifuged at a speed of 5000r / min for 15min, and the supernatant was removed to obtain the lower filter residue; the above filter residue was placed in a beaker, and deionized water After washing the filter residue 5 times, add 300mL of sodium chlorite solution with a mass fraction of 25g / mL to the beaker, adjust the pH to 5.2 with a glacial acetic acid solution with a mass fraction of 90%, heat the beaker to 80°C, and keep it warm. After 3 hours, delignified fibers were obtained, and the delignified fibers were mixed with hydrochloric acid with a mass fraction of 10% in a m...

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Abstract

The present invention relates to the technical field of preparation of liquid for de-icing and anti-icing of outer surfaces of aircrafts and particularly relates to a preparation method of low-temperature anti-adhesive aircraft de-icing and anti-icing liquid. Potatoes are used as a raw material; the potatoes are treated to obtain delignified fibers; a nitric acid solution is added to activated carbon mixed liquid to obtain modified activated carbon mixed liquid; microcrystalline fiber powder, supernatant, propylene glycol, etc. are heated and mixed; at the same time, ammonia gas is introduced;and after a reaction is finished, the materials are discharged to obtain the low-temperature anti-adhesive aircraft de-icing and anti-icing liquid. The microcrystalline fiber powder extracted with the potatoes as the raw material is fibers liable to soften at normal temperature. During the process of freezing on the surfaces of the aircrafts due to low temperature, the low-temperature anti-adhesive aircraft de-icing and anti-icing liquid can prevent crystal particles from forming large ice crystals and avoid formation of ice blocks. In addition, the microcrystalline fibers present rigid molecular chains at low temperature, can avoid production of hydrated gel of the propylene glycol, ethylene glycol, etc. in the aircraft de-icing and anti-icing liquid at a low freezing point, and reducescorrosion of the aircraft surface metals by the aircraft de-icing and anti-icing liquid. The aircraft de-icing and anti-icing liquid has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of liquid preparation for deicing and anti-icing on the outer surface of an aircraft, in particular to a preparation method of a low-temperature anti-sticking aircraft de-icing and anti-icing liquid. Background technique [0002] Under the icy weather conditions of rain and snow, the ground, roads or airport runways are very easy to freeze. The icing of the airport pavement not only may cause the aircraft to skid off the runway when taxiing, but also is more fatal to the landing of the aircraft, thus threatening the safety of road traffic and aviation operations in winter. There have been many air accidents caused by severe ice and snow in the history of aviation in the world. Flight crews, maintenance and dispatch personnel should all pay high attention to the serious harm brought by complex weather conditions in winter to aircraft take-off. The most effective deicing and anti-icing method in general at pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/18
CPCC09K3/185
Inventor 刘凡领何伟仁张建初
Owner 刘凡领
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