Organic anti-freeze cooling liquid and preparation method thereof

Abstract

The invention discloses a cooling liquid for automobiles, and relates to an organic anti-freeze cooling liquid and a preparation method thereof. The cooling liquid is characterized by comprising 40 to 60 percent of glycol, 60 to 40 percent of de-ionized water and additives, wherein the additives comprise a reducing agent, an antioxidant, an antiseptic, a rust preventative, a mildew inhibitor, a scale inhibitor, a defoaming agent, a pH value buffer and a pH value regulator. The preparation method comprises the following steps of: 1, adding the de-ionized water and the reducing agent into a reactor A and heating the mixture to the boiling point; and 2, squeezing the liquid in the reactor A into a reactor B after the temperature reaches the normal temperature, and adding the glycol and the additives into the reactor B to prepare the anti-freeze cooling liquid. Due to the adoption of hydrazine hydrate in the invention, free oxygen in the de-ionized water is eliminated and the problem of corrosion resistance is solved well; the product meets the requirements on long-term effect, environmental protection, safety and non-toxicity; the cooling liquid has the advantage of low cost of the required raw materials; the preparation method has the advantages of simplicity, a few facilities and low energy consumption, wins warm praise from customers and has extremely high popularization and application value and broad market prospect.

Description

technical field [0001] The invention relates to a coolant for automobiles. Background technique [0002] Today, fundamental changes have taken place in people's thinking on the application of antifreeze coolant for automobiles. It not only requires good antifreeze and cooling performance, but also requires long-term performance, environmental protection, safety, and non-toxicity. It has become a maintenance-free antifreeze Coolant. [0003] At present, the antifreeze coolant sold on the market is based on ethylene glycol and water, supplemented with organic and inorganic composite additives. The pure inorganic salt type antifreeze coolant has been eliminated. The pure organic acid type antifreeze coolant is difficult for people to accept due to factors such as price. Therefore, engineers and technical personnel and related departments are researching and developing new antifreeze coolant to make it high-quality, high-performance, and affordable for people. Acceptable antif...

AI Technical Summary

Problems solved by technology

[0006] Ethylene glycol, water-based organic antifreeze coolant, patent applications 96109058.8, 98104884.6, 981117298.9, 200610015513.5, 02159677.8, 200480036206.4, 200810050223.3 all use phosphorus-containing compounds, which are prone to produce 38.8, 4030 harmful substances, patent application 203 200910075775.4, 01131412.5, 93121035.6 use hydroquinone, p-tert-butylcatechol, p-hydroxyanisole, ascorbic acid and other antioxidants to improve the performance of the coolant. However, there is no treatment for the free oxygen in the antifreeze coolant. The existence of free oxygen in deionized water will consume antioxidants in the process of preparing antifreeze coolant, so that the amount of antioxidants is insufficient during the use of coolant, resulting in the oxidation of ethylene glycol and the formation of formic acid. mixed acid corrosive substances

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