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Automobile engine cooling liquid and its preparing process

A technology for automobile engine and coolant, applied in the field of coolant, can solve the problems of poor coolant stability, unstable coolant, low solubility, etc., and achieve good corrosion inhibition effect, stable and reliable quality, and good stability.

Inactive Publication Date: 2010-02-17
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the corrosion inhibitor is introduced, it also leads to the instability of the cooling liquid, such as the introduction of sodium silicate, 2-mercaptobenzothiazole (MBT), benzotriazole (BTA), and tolyltriazole (TTA)
Sodium silicate and 2-mercaptobenzothiazole (MBT) are excellent corrosion inhibitors for aluminum and its alloys, benzotriazole (BTA) and tolyltriazole (TTA) are corrosion inhibitors for copper and copper alloys , but the two have a negative impact on the stability of the coolant, and are prone to flocculent precipitation
At present, silicate has been stabilized by a silicon stabilizer, while TTA and BTA are almost insoluble in water, and their solubility in alcohols is also very small. They are prone to precipitation due to photosensitivity reactions, resulting in instability of the cooling liquid. Therefore, copper and its The corrosion inhibition of alloys has attracted much attention, and providing a long-term and stable automotive engine coolant for corrosion inhibition of copper and its alloys has become an urgent problem in this technical field.

Method used

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  • Automobile engine cooling liquid and its preparing process
  • Automobile engine cooling liquid and its preparing process
  • Automobile engine cooling liquid and its preparing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Step 1. Add 20kg of deionized water to a reactor with a stirrer, then add 30kg of ethylene glycol, 0.1kg of phosphoric acid and 1kg of borax, and stir until they are completely dissolved.

[0033] Step 2, add 50kg of deionized water to another reactor with agitator, then add 1kg of triethanolamine, 0.1kg of sodium hydroxide, 0.1kg of 2-amylaminebenzimidazole (PAB), 0.2kg of mercaptobenzothiazole Sodium (NACAP), 0.1kg of 3-(trihydroxymethylsiloxane)-propanyl-monophosphate phosphate and 0.1kg of sodium silicate, fully stirred until completely dissolved.

[0034] Mix and stir the materials in step 1 and step 2 evenly, and add an appropriate amount of simethicone emulsion and direct sunfast blue to prepare the cooling liquid 1 of the present invention.

Embodiment 2

[0036] Step 1. Add 30kg of deionized water into the reaction kettle with agitator, then add 40kg of ethylene glycol, 0.05kg of phosphoric acid and 0.51kg of borax, and stir until they are completely dissolved.

[0037] Step 2, add 30kg of deionized water to another reactor with agitator, then add 0.5kg of triethanolamine, 0.05kg of sodium hydroxide, 0.05kg of 2-amylamine benzimidazole (PAB), 0.15kg of mercaptothiazole di Sodium (NATD), 0.05kg of 3-(trihydroxymethylsiloxane)-propanyl-monophosphate phosphate and 0.05kg of sodium silicate, fully stirred until completely dissolved.

[0038] Mix and stir the materials in step 1 and step 2 evenly, and add an appropriate amount of simethicone emulsion and direct sunfast blue to prepare the cooling solution 2 of the present invention.

Embodiment 3

[0040] Step 1. Add 25kg of deionized water into the reaction kettle with agitator, then add 50kg of ethylene glycol, 0.15kg of phosphoric acid and 1.5kg of borax, and stir until all of them are dissolved.

[0041] Step 2, add 25kg deionized water in another reactor with agitator, then add 1.5kg triethanolamine, 0.15kg sodium hydroxide, 0.15kg2-pentylamine benzimidazole (PAB), 0.15kg mercaptothiazole di Sodium (NATD), 0.1kg sodium mercaptobenzothiazole (NACAP), 0.15kg 3-(trihydroxymethylsiloxane)-propanyl-monophosphate phosphate and 0.15kg sodium silicate, fully stirred until completely dissolved .

[0042] Mix and stir the materials in step 1 and step 2 evenly, and add an appropriate amount of simethicone emulsion and direct sunfast blue to prepare the cooling liquid 3 of the present invention.

[0043] The cooling liquid 1 of the present invention is subjected to a glassware corrosion test, the cooling liquid 2 of the present invention is subjected to a simulated practical c...

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PUM

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Abstract

A cooling liquid of engine for vehicle and its production are disclosed. It consists of water, glycol and other additives. Copper corrosion inhibitor, thiazodium and alkyl amine benzimidazole. The pHvalue is between 6-11, it has excellent corrosion inhibiting function, less usage and better stability. It has good boiling and freezing resistances and no deposits and scales.

Description

technical field [0001] The invention relates to coolant technology, in particular to an automobile engine coolant and a preparation method. Background technique [0002] At present, the coolant widely used in automobile engine cooling system should not only have a good cooling and heat dissipation effect, but also have functions such as anticorrosion, scale inhibition, and antifreeze. Its composition includes water, antifreeze and additives. Water and antifreeze are the base fluids, and the additives are mainly corrosion inhibitors, defoamers and colorants. According to the technical requirements of the Chinese standard SH0521-1999 or the American standard ASTM-D-3306, the coolant should have a corrosion inhibitory effect on metals such as steel, cast iron, copper, brass, cast aluminum, and solder. Therefore, borax, Amines, nitrites, phosphates, silicates, carboxylic acids, nitrogen heterocyclic compounds, etc. are used as corrosion inhibitors, and the pH value is adjusted...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/20
Inventor 朱红于学清
Owner BEIJING JIAOTONG UNIV
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