Cooling fluid of engine

A technology of engine coolant and monobasic acid, which is applied in the field of engine coolant, can solve the problems of large amount of organic additives, containing carcinogens, easy formation of precipitation, etc., and achieves the effects of increasing the boiling point, improving the anti-scaling function, and improving the sterilization function.

Active Publication Date: 2008-07-09
LIAONING SANTE PETROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mainstream coolant products in the market are inorganic salts and inorganic-organic composites, and most of the coolants contain carcinogens, which are prone to precipitation, defoaming is very difficult, and cavitation is serious; there is no complete article on organic coolants using propylene glycol in China. According to the literature, the cooling liquid patent with the patent No. 01131412.5 only uses ethylene glycol and organic additives to compound an all-organic cooling liquid. It also uses organic matter and ethylene glycol to compound such as US patents 4,587,028 and 4,647,392 abroad, but The amount of organic additives is large, the cost is high, and there is the possibility of polluting the environment

Method used

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  • Cooling fluid of engine

Examples

Experimental program
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Effect test

Embodiment 1

[0039] Embodiment 1: the preparation of polymer

[0040] 30kg ethylene oxide and 30kg lauryl alcohol (also lauryl alcohol) are reacted in an autoclave with 0.3kg potassium hydroxide as a catalyst, refluxed for 3 hours, the reaction temperature is controlled at 100°C, and the vacuum degree is controlled at 0.5MPa. React under vacuum stirring, after making the added mole number of oxirane be 36 moles, the temperature of reaction is lowered to 40 ℃, in the dodecanoic acid (also lauric acid) of adding 60kg in reaction kettle, rely on dodecanoic acid The catalyst performance of the acid itself is not only the raw material to participate in the reaction, but also the catalyst in the reaction process. The temperature is raised to 80°C, and the vacuum degree is controlled at 0.4MPa. After 1.5 hours of reaction, the temperature is raised to 110°C, and the pressure is controlled at 0.65MPa. After constant temperature for 35 minutes, the temperature was raised to 120°C, the pressure was ...

Embodiment 2

[0041] Embodiment 2: the preparation of fluorescent green

[0042] Take water-soluble tartrazine (C 16 h 12 N 4 o 9 S 2 3Na) 0.0001kg and water-soluble brilliant blue (C 37 h 36 N2 o 9 S 3 2Na) 0.0001kg mixed to obtain fluorescent green.

Embodiment 3

[0044] Add 30kg of propylene glycol to the blending kettle, then use the feed pump to extract 69kg of deionized water, place it in the blending kettle to blend with propylene glycol, start a new pulse stirring system, and stir for 10 minutes to make the water and propylene glycol well compatible; Next, add benzotriazole 0.05kg, polymer 0.6kg, sodium benzoate 0.15kg, polyacrylic acid 0.05kg, AEO 9 (fatty alcohol polyoxyethylene (9) ether) 0.05kg, n-octanoic acid 0.05kg, sebacic acid disodium salt 0.05kg, butylparaben (4-hydroxybenzoic acid butyl) 0.0002kg, defoamer (poly Oxyethylene polyoxypropylene monobutyl ether XD-4000) 0.0002kg, fluorescent green 0.0002kg; mixed and stirred at 35±5°C for 30 minutes, tested, filtered and packaged to obtain the engine coolant of this invention.

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Abstract

This invention relates to an engine cooling liquid, which comprises: propylene glycol, deionized water, pyrrole compound, polymer, polyacrylic acid, and sodium benzoate, purging agent AEO9, monobasic acid, dibasic salt, 4-hydroxy butyl benzoate, antifoamer and fluorescent green. The cooling liquid can form two compact protecting films on metal surface: a polymer film adsorbed on the metal surface and an organic acid film on the polymer film. The two protecting films can protect the metals from corrosion by water and propylene glycol. Besides, the cooling liquid also has good anti-freezing, anti-boiling, anti-contamination, anti-leaking, anti-rusting and anti-corrosion performance.

Description

Technical field: [0001] The invention relates to an engine coolant used in a motor vehicle cooling system, in particular to an engine coolant containing propylene glycol. Background technique: [0002] The engine cooling system is an important part of motor vehicles. Therefore, with the increase of vehicles, the coolant used in the cooling system also increases. There is a big problem with the existing coolants in China: the main material of the coolant is B Low-molecular alcohols such as glycol and methanol are not environmentally friendly and have poor biodegradability, and most of them are inorganic salt-type coolants, which have short service life and are prone to precipitation. More importantly, they contain amine salts, nitrites, etc. Chemical raw materials that cause carcinogens. [0003] The US National Institute of Occupational Health (NIOSH) and the Japan Materials Testing Association successively pointed out that the compound use of amino alcohols and nitrites ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/20
Inventor 王海祥范村
Owner LIAONING SANTE PETROCHEM
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