Anti-freezing cooling liquid and preparation thereof

A technology of antifreeze coolant and coolant, which is applied in the direction of chemical instruments and methods, heat exchange materials, etc., can solve the problems of poor storage stability and inhibition effect, and achieve the effects of improving stability, inhibiting precipitation, and improving inhibition effect

Active Publication Date: 2009-03-04
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages of poor storage stability and poor inhibitory effect on aluminum and aluminum alloy corrosion in ex

Method used

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  • Anti-freezing cooling liquid and preparation thereof

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preparation example Construction

[0015] The invention also provides a method for preparing the antifreeze cooling liquid, wherein the method comprises uniformly mixing ethylene glycol, water, sebacic acid, sodium silicate, cinnamic acid, mannitol and an antifoaming agent.

[0016] Preferably, the method comprises uniformly mixing ethylene glycol and water at a mixing temperature of 40-80° C., then adding sebacic acid, sodium silicate, cinnamic acid and mannitol and mixing evenly at a mixing temperature of 40-80° C. °C, adjust the pH value to 7-11, and then add a defoamer to obtain a cooling liquid.

[0017] According to the present invention, the method for adjusting the pH value to 7-11 is well known to those skilled in the art, for example, the pH value can be adjusted by adding sodium hydroxide and / or potassium hydroxide, preferably, the pH value is adjusted to 8 -10.

[0018] According to the preparation method of the present invention, ethylene glycol, water, sebacic acid, sodium silicate and antifoamin...

Embodiment 1

[0023] This embodiment is used to illustrate the antifreeze coolant provided by the present invention.

[0024] 100 parts by weight of water and 90 parts by weight of ethylene glycol are mixed evenly, and the mixing temperature is 60 ° C, and then sequentially add 0.6 parts by weight of sodium silicate, 0.05 parts by weight of cinnamic acid, 0.5 parts by weight of mannitol and 0.8 parts by weight of 2 parts of sebacic acid were mixed evenly, and sodium hydroxide was added to adjust the pH value to 7, and then 0.04 parts by weight of defoamer OF50 (Beijing Shijingshan Hangping Organosilicon Factory) was added to obtain antifreeze coolant S1.

Embodiment 2

[0028] This embodiment is used to illustrate the antifreeze coolant provided by the present invention.

[0029] Mix 100 parts by weight of water and 100 parts by weight of ethylene glycol uniformly at 40°C, then add 0.2 parts by weight of benzotriazole, 1.2 parts by weight of borax, and 2.0 parts by weight of sodium silicate , 0.5 parts by weight of sodium benzoate, 0.05 parts by weight of cinnamic acid, 0.05 parts by weight of mannitol, 0.5 parts by weight of sodium nitrate, 1.0 parts by weight of sebacic acid and 0.15 parts by weight of disodium diethylamine tetraacetate mixed uniformly , adding potassium hydroxide to adjust the pH value to 11, and then adding 0.05 parts by weight of tributyl phosphate to obtain antifreeze coolant S2.

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Abstract

The invention provides an antifreezing cooling liquid which comprises glycol, water, decanedioic acid, sodium silicate and a foam killer; wherein, the cooling liquid also contains cinnamic acid and mannite. The invention also provides a preparation method of the antifreezing cooling liquid; wherein, the method includes the step of uniformly mixing the glycol, the water, the decanedioic acid, the sodium silicate and the foam killer. The storage stability of the antifreezing cooling liquid provided by the invention is better; besides, the antifreezing cooling liquid provided by the invention extensively improves the restraining effect to aluminum corrosion.

Description

technical field [0001] The invention relates to an antifreeze cooling liquid and a preparation method thereof. Background technique [0002] At present, the antifreeze coolant mostly uses the aqueous solution of ethylene glycol, adding phosphate and borate additives in the aqueous solution of ethylene glycol can make the antifreeze coolant have a great inhibitory effect on the corrosion of copper and cast iron, but with the With the wide application of aluminum alloy in the cooling system of automobile engines, the disadvantage of the antifreeze coolant being highly corrosive to the aluminum surface gradually emerged. Therefore, people add silicate additives to the antifreeze coolant to inhibit the antifreeze coolant from affecting Corrosion of aluminum and aluminum alloys. [0003] For example, CN13696232A discloses a anti-corrosion, anti-scaling and anti-boiling refrigerant, which includes 85-99.6% by weight of ethylene glycol, 0.01-3% by weight of preservative nitrite, a...

Claims

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Application Information

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IPC IPC(8): C09K5/20
Inventor 张日清董俊卿
Owner BYD CO LTD
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