LNG vehicle anti-freezing liquid

A technology of automobile antifreeze and LNG, which is applied in the field of antifreeze, which can solve the problems that the antifreeze performance of antifreeze cannot meet the requirements of LNG heavy trucks, the antifreeze cannot flow normally, and affect the normal use of automobiles, etc., and achieve the effect of inhibiting corrosion and antifreezing Good, the effect of increasing the heat conduction speed

Active Publication Date: 2015-07-15
SHAANXI AUTOMOBILE GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The liquefaction point of LNG for vehicles is -161.5°C. When it is vaporized by the carburetor, it absorbs a large amount of heat from the antifreeze liquid, which causes the antifreeze liquid to freeze in the carburetor in winter, and the antifreeze liquid cannot flow normally, which affects the normal use of the car.
Therefore, the antifreeze performance of traditional antifreeze cannot meet the requirements for the use of LNG heavy trucks in cold regions in winter

Method used

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  • LNG vehicle anti-freezing liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0010] Example 1: Ethylene glycol 35%; Dimethyl sulfoxide 5%; Sodium molybdate 0.1%; Sodium dihydrogen phosphate 0.1%; Benzotriazole 0.1%; Phthalic acid 0.1%; Isophthalic acid 0.1% %; mercaptobenzothiazole 0.05%; sodium nitrate 0.1%; sodium benzoate 0.05%; sodium hydroxide 0.1%; fluorescein 0.0005%; deionized water balance.

Embodiment 2

[0011] Example 2: Ethylene glycol 55%; Dimethyl sulfoxide 30%; Sodium molybdate 0.3%; Sodium dihydrogen phosphate 0.4%; Benzotriazole 0.6%; Phthalic acid 0.3%; Isophthalic acid 0.3% %; mercaptobenzothiazole 0.8%; sodium nitrate 0.3%; sodium benzoate 0.2%; sodium hydroxide 0.5%; fluorescein 0.0015%; deionized water balance.

Embodiment 3

[0012] Example 3: Ethylene glycol 51.54%; Dimethyl sulfoxide 5.08%; Sodium molybdate 0.11%; Potassium dihydrogen phosphate 0.37%; Benzotriazole 0.28%; Phthalic acid 0.18%; %; mercaptobenzothiazole 0.09%; sodium nitrate 0.11%; sodium benzoate 0.09%; sodium hydroxide 0.37%; fluorescein 0.0008%; deionized water balance.

[0013] The test results of the quality index of this kind of antifreeze are as follows:

[0014]

[0015]

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PUM

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Abstract

The present invention relates to an LNG vehicle anti-freezing liquid, and provides a new special LNG vehicle anti-freezing liquid used for cold regions and having characteristics of excellent corrosion resistance, rust resistance, scale inhibition, high boiling point, and low freezing point. The LNG vehicle anti-freezing liquid is characterized by comprising, by weight, 35-55% of ethylene glycol, 5-30% of dimethyl sulfoxide, 0.1-0.3% of sodium molybdate, 0.1-0.4% of potassium dihydrogen phosphate, 0.1-0.6% of benzotriazole, 0.1-0.3% of phthalic acid, 0.1-0.3% of Isophthalic acid, 0.05-0.8% of mercapto benzothiazole, 0.1-0.3% of sodium nitrate, 0.05-0.2% of sodium benzoate, 0.1-0.5% of sodium hydroxide, 0.0005-0.0015% of fluorescein, and the balance of deionized water.

Description

technical field [0001] The invention relates to an antifreeze liquid, in particular to an antifreeze liquid used for LNG vehicles. Background technique [0002] LNG for vehicles is stored in low-temperature liquid and gaseous forms in gas cylinders. It can be extracted from the gas cylinder in pure liquid or gas-liquid mixed form, and heated by the LNG vaporizer and its pipeline to become a gaseous state. The carburetor is installed between the cylinder and the engine. The carburetor is connected to the engine cooling system, and the coolant (supplied by the engine) flows through the shell side of the carburetor and heats the tube side. When the liquefied natural gas enters the carburetor, it is vaporized and heated by the high-temperature coolant from the engine, and then supplied to the engine. [0003] The liquefaction point of LNG for vehicles is -161.5°C. When it is vaporized by the carburetor, it absorbs a large amount of heat from the antifreeze liquid, which causes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/20
CPCC09K5/20
Inventor 白培谦刘峰王庆国
Owner SHAANXI AUTOMOBILE GROUP
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