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a deicing agent

A snow-melting agent and low-molecular technology, which is applied in other chemical processes, chemical instruments and methods, etc., can solve problems such as unsatisfactory long-term use, corrosion, and no snow-melting agent found, and achieve a significant effect of melting ice and snow, reducing The effect of labor intensity and ease of snow melting

Active Publication Date: 2016-04-06
SCI INST HOHHOT ADMINISTRATION OF RAILWAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The second type of non-chlorine salt deicing agent has little harm to the environment and has high environmental protection significance. However, due to its high price, it is only used in small areas such as airports.
[0007] For the third type of mixed deicing agent, that is, liquid organic matter + rust inhibitor type deicing agent, on the one hand, the composition of the mother liquor is relatively single, and most of this type of deicing agent choose an organic alcohol as the mother liquor; on the other hand, the existing corrosion inhibitor The components of nitrite have a certain degree of toxicity. For example, nitrite as a corrosion inhibitor is a carcinogen, which cannot be used according to the regulations of the labor and health department; Salt is the main component, but silicate is unstable in aqueous solution, so a silicate stabilizer must be used at the same time, which is not ideal for long-term use; molybdate is expensive and rarely used in practical applications
After the corrosion inhibitor dissolves, it will often cause corrosion and pollution to the soil, road surface or other contact surfaces, and even affect the survival of humans and animals.
At present, deicing agents are widely used in roads, airports, etc., but there is no deicing agent used in railway turnouts.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] For Shanxi, Hebei and southern regions where the temperature is around -15°C and above, the ratio of various substances:

[0052] Low molecular organic polyol: 30%

[0053] Ethanol: 1%

[0054] Water: 67.4%

[0055] Triethanolamine: 0.8%;

[0056] Metal ion chelates and their salts: 0.1%;

[0057] Sodium metasilicate: 0.2%;

[0058] Benzotriazole: 0.3%;

[0059] Sodium dihydrogen phosphate: 0.2%

[0060] The preparation method is as described above.

Embodiment 2

[0062] For colder regions in the north, such as the three eastern provinces, where the temperature is -25 to -30°C and below, the ratio of various substances:

[0063] Low molecular weight organic polyol: 60%

[0064] Ethanol: 2%

[0065] Water: 34.5%

[0066] Triethanolamine: 1.0%;

[0067] Metal ion chelates and their salts: 0.8%;

[0068] Sodium metasilicate: 0.4%;

[0069] Benzotriazole: 0.8%;

[0070] Sodium dihydrogen phosphate: 0.5%

[0071] The preparation method is as described above.

Embodiment 3

[0072] Embodiment 3: performance measurement

[0073] Metal corrosion test and toxicological index

[0074] According to the formula above, different proportions of deicing agent were prepared, and the corrosion test was carried out. Measure performance indicators such as viscosity, specific gravity, pH value, freezing point, etc., then put a certain amount of aluminum alloy, copper, and steel sheet at 25°C, seal and let it stand for 7 days (168h), and measure the effect of different compound formula snow melting agents on metal tests. Corrosion of the sheet, the results are shown in Table 1:

[0075] Table 1 full formula test result

[0076]

[0077]

[0078] The test results of the main technical indicators of the deicing agent are shown in Table 2:

[0079] Test items

Standard Requirements (Liquid)

results of testing

Dissolving speed / (g / min)

≥6.0

11.0

Snow melting and ice melting capacity / (g / min)

≥90% of sodium chloride ...

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Abstract

The invention discloses a snow-melting agent. The snow-melting agent comprises following components by weight: 30-60% of low-molecular organic polyol, 0.8-1.2% of triethanolamine, 0.1-1% of a metal ion chelate or salts thereof, 0.2-0.4% of sodium metasilicate, 0.1-1% of benzotriazole, 0.2-0.5% of sodium dihydrogen phosphate, and 30-70% of water. The snow-melting agent adopts a formula combining an organic phase and an inorganic phase, and comprises a mixture of two or three compounds selected from glycol, propylene glycol and ethanol, and a composite corrosion inhibitor including the water, the triethanolamine, the metal ion chelate or the salts thereof, the sodium metasilicate, the benzotriazole and the sodium dihydrogen phosphate. The freezing point of the snow-melting agent is below -40 DEG C, and the snow-melting agent has significant ice and snow melting effects.

Description

technical field [0001] The invention relates to the field of deicing agents. Background technique [0002] Turnout is an important part of railway station transportation equipment. When it snows in winter, especially when the snow is relatively heavy, if the snow on the turnout is not cleaned in time or is not cleaned thoroughly, it is easy to cause the tip of the point rail of the turnout to not stick closely to the basic rail, and it will directly Affect the sending and receiving operations of trains, and even cause the interruption of railway transportation. [0003] In order to solve the problem of freezing and snow accumulation of turnouts in snowy weather, a lot of research has been carried out at home and abroad. There are mainly the following methods for snow removal of turnouts: electric heating, gas heating, hot air, compressed air, blowtorch heating, warm water injection type, warm water circulation type and deicing agent. However, due to 1) the large power cons...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K3/18
Inventor 吉荣廷
Owner SCI INST HOHHOT ADMINISTRATION OF RAILWAY
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