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Engine coolant and preparation method thereof

An engine coolant and solution technology, applied in chemical instruments and methods, heat exchange materials, etc., can solve the problems of difficult to protect metal iron, low buffer platform, etc., to achieve the effect of small corrosion and improved protection

Inactive Publication Date: 2014-05-28
江苏三阳环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention solves the technical problem in the prior art that the organic acid engine coolant has a low buffer platform and is difficult to protect metal iron

Method used

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  • Engine coolant and preparation method thereof

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preparation example Construction

[0025] The invention provides a preparation method of the engine coolant, comprising the following steps:

[0026] a. Dissolve fatty acids or fatty acid salts, aromatic acids or aromatic acid salts and additives in water, adjust the pH value to 9.0-10.5, and record it as solution A;

[0027] b. Dissolve the silicate in water to form a silicate solution; add the silicate solution into solution A, stir evenly, and record it as solution B;

[0028] c. Filter solution B, add ethylene glycol to the filtrate, and stir evenly to obtain the engine coolant.

[0029] According to the preparation method provided by the present invention, fatty acids or fatty acid salts, aromatic acids or aromatic acid salts and additives are dissolved in part of the water, and the pH value is adjusted to 9.0-10.5, which is recorded as solution A; in addition, the remaining silicate solution Prepare a silicate solution in water, and then pour it into A. In order to avoid precipitation when the silicate s...

Embodiment 1

[0032] (1) Add 470 parts by weight of deionized water to the container, then add 5 parts by weight of borax, 15 parts by weight of 2-aminoglutaric acid, 5 parts by weight of succinic acid, 5 parts by weight of sebacic acid, and 5 parts by weight of sodium benzoate , 5 parts by weight of terephthalic acid, 5 parts by weight of p-nitrobenzoic acid, 1 part by weight of benzotriazole, 25 parts by weight of sodium hydroxide, stirred to dissolve; finally add silicate stabilizer modified siloxane N4144 ( The molecular formula is CH 3 O(CH 2 CH 3 O) 7.8 C 3 h 6 Si(OCH 3 ) 3 ) 0.3 parts by weight, and stirred evenly to obtain solution A1.

[0033] (2) In another container, add 75 parts by weight of deionized water, then add 1 part by weight of sodium silicate nonahydrate and stir until dissolved to prepare a sodium silicate solution; add the sodium silicate solution to solution A1, stir evenly, and obtain Solution B1.

[0034] (3) Filter solution B1, add 380 parts by weight of e...

Embodiment 2

[0041] (1) Add 450 parts by weight of deionized water into the container, then add 20 parts by weight of 2-aminoglutaric acid, 5 parts by weight of glutaric acid, 7 parts by weight of capric acid, 5 parts by weight of terephthalic acid, and 5 parts by weight of sodium benzoate Parts by weight, 3 parts by weight of isooctanoic acid, 1 part by weight of benzotriazole, and 27 parts by weight of sodium hydroxide were stirred until dissolved; finally, 0.3 parts by weight of silicate stabilizer sodium aluminate was added and stirred evenly to obtain solution A2.

[0042] (2) Quantitatively add 75 parts by weight of deionized water into another container, then add 0.5 parts by weight of sodium silicate nonahydrate and stir until dissolved to prepare a sodium silicate solution; add the sodium silicate solution to solution A2, stir evenly, Solution B2 is obtained.

[0043] (3) Filter solution B2, add 190 parts by weight of ethylene glycol, 5 ppm sodium fluorescein and 50 ppm silicone d...

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Abstract

The invention discloses an engine coolant, which comprises water, glycol, a fatty acid or fatty acid salt, an aromatic acid or aromatic acid salt, silicate and an additive, wherein the pKa of the fatty acid or fatty acid salt is 4.7-6.5; the pKa of the aromatic acid or aromatic acid salt is 3-5; and the additive contains a buffer platform elevator which is 2-aminoglutaric acid or a mixture of the 2-aminoglutaric acid and borate. The invention further provides a preparation method of the engine coolant. The engine coolant provided by the invention is provided with two buffer platforms, so that protection of metal iron can be enhanced on the premise of well protecting other metals with the engine coolant.

Description

technical field [0001] The invention relates to an engine coolant and a preparation method thereof. Background technique [0002] Engine coolant is used to take away a large amount of heat generated by fuel combustion during engine operation, so as to ensure stable operation of the engine at an appropriate temperature. Most of the engine coolants used in the market are aqueous solutions of ethylene glycol, water is used as the main cooling medium, and ethylene glycol is used to lower the freezing point of the coolant; at the same time, in order to ensure that the metal parts of the engine cooling system are not damaged by the coolant during use Corrosion, various corrosion inhibitors are usually added to the coolant. The corrosion inhibitor additives used in common coolants are mainly inorganic salts, and some organic acid salts are also used. [0003] The cooling liquid itself is alkaline. During use, ethylene glycol is gradually oxidized to produce acidic substances, whi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K5/20
CPCC09K5/10C23F11/08C23F11/10
Inventor 朱志坚
Owner 江苏三阳环保科技有限公司
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