CN112778981A - Antifreezing solution and preparation method thereof - Google Patents
Antifreezing solution and preparation method thereof Download PDFInfo
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- CN112778981A CN112778981A CN201911093534.2A CN201911093534A CN112778981A CN 112778981 A CN112778981 A CN 112778981A CN 201911093534 A CN201911093534 A CN 201911093534A CN 112778981 A CN112778981 A CN 112778981A
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Abstract
The application discloses an antifreezing solution and a preparation method thereof, and belongs to the technical field of internal combustion engines. The antifreeze provided by the embodiment of the application comprises: 25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water. The antifreeze liquid with different freezing points can be prepared by changing the volume fractions of the components, and the specific heat capacity of the antifreeze liquid is similar to that of water, so that more heat can be taken away; the viscosity of the antifreeze is low, and the antifreeze can flow in the water tank quickly; the pH of the antifreeze is alkaline, and the antifreeze can neutralize acidic substances generated by the antifreeze. The antifreezing solution can meet the requirement of internal combustion engines with different environmental temperatures on the antifreezing solution, avoid the excess performance of the antifreezing solution and reduce the purchasing cost.
Description
Technical Field
The present application relates to the field of internal combustion engine technology. In particular to an antifreezing solution and a preparation method thereof.
Background
An internal combustion engine is a power machine that operates by burning fuel in the machine to generate a large amount of heat and converting the heat into power. However, the heat may overheat the cylinder of the internal combustion engine, burning out the components, so that the heat on the surface of the cylinder can be taken away by the antifreeze during use, and then is released out through the water tank and the fan, thereby protecting the cylinder. The anti-freezing liquid is a cooling liquid with an anti-freezing function, can prevent a water tank from being frozen down in winter, can also prevent the water tank from boiling in summer, is anti-scaling and anti-corrosion, and has great influence on the performance of the internal combustion engine.
The antifreeze used in the related technology is mainly a finished antifreeze purchased from the market, and the freezing point of the finished antifreeze is generally-45 ℃. The antifreezing solution mainly comprises glycol, water and other additives.
However, some regions have no severe cold, for example, in Chongqing regions, the lowest temperature in winter is-8 ℃ to-2 ℃, the freezing point of the finished antifreeze is far lower than that in Chongqing regions, and purchasing the finished antifreeze in the regions can result in excessive performance and high cost of the finished antifreeze.
Disclosure of Invention
The embodiment of the application provides an antifreezing solution and a preparation method thereof, which can avoid the excess of the performance of the antifreezing solution and reduce the purchasing cost. The specific technical scheme is as follows:
in one aspect, an embodiment of the present application provides an antifreeze, including the following components by volume fraction:
25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water;
the freezing point range of the anti-freezing solution is-10 ℃ to-35 ℃, and the anti-freezing solutions with different freezing points comprise components with different volume fractions;
the specific heat capacity of the antifreeze is 3.50-3.76J/(g ℃); the viscosity of the antifreeze solution is 2.05-3.13 mPa & S; the pH value of the hydrogen ion concentration index of the antifreeze is 8.49-9.23.
In one possible implementation, the antifreeze further includes: hydroxypropyl-beta-cyclodextrin;
the volume fraction of the hydroxypropyl-beta-cyclodextrin is 0.5-1%.
In another possible implementation manner, the anti-freezing solution further includes: glutaraldehyde;
the volume fraction of the glutaraldehyde is 0.5-1%.
In another possible implementation manner, when the freezing point of the anti-freezing solution is-15 ℃, the anti-freezing solution comprises the following components in volume fraction:
28 to 35 percent of the ethylene glycol, 1 to 3 percent of the Lan-826 general pickling corrosion inhibitor, 0.5 to 1 percent of the sodium molybdate, 0.5 to 1 percent of the hydrolyzed polymaleic anhydride, 0.5 to 1 percent of the hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of the glutaraldehyde and the balance of the deionized water.
In another possible implementation, the antifreeze is suitable for use in internal combustion engines which are subjected to ambient temperatures above-15 ℃.
In another possible implementation manner, when the freezing point of the anti-freezing solution is-25 ℃, the anti-freezing solution comprises the following components in volume fraction:
37-42% of ethylene glycol, 1-3% of Lan-826 general pickling corrosion inhibitor, 0.5-1% of sodium molybdate, 0.5-1% of hydrolyzed polymaleic anhydride, 0.5-1% of hydroxypropyl-beta-cyclodextrin, 0.5-1% of glutaraldehyde and the balance of deionized water.
In another possible implementation, the antifreeze is suitable for use in internal combustion engines that are subjected to ambient temperatures above-25 ℃.
In another possible implementation manner, when the freezing point of the anti-freezing solution is-35 ℃, the anti-freezing solution comprises the following components in volume fraction:
45-50% of ethylene glycol, 1-3% of Lan-826 general acid pickling corrosion inhibitor, 0.5-1% of sodium molybdate, 0.5-1% of hydrolyzed polymaleic anhydride, 0.5-1% of hydroxypropyl-beta-cyclodextrin, 0.5-1% of glutaraldehyde and the balance of deionized water.
In another possible implementation, the antifreeze is suitable for use in internal combustion engines that are subjected to ambient temperatures above-35 ℃.
In another aspect, an embodiment of the present application provides a preparation method of an antifreeze, where the preparation method includes:
adding ethylene glycol and deionized water into a stirrer according to the volume fraction of the components, and uniformly stirring;
adding a Lan-826 general pickling corrosion inhibitor, sodium molybdate and hydrolyzed polymaleic anhydride into the stirrer, and uniformly stirring to obtain the antifreezing solution.
The technical scheme provided by the embodiment of the application has the following beneficial effects:
the antifreeze provided by the embodiment of the application comprises the following components in percentage by volume: 25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water. The freezing point range of the antifreeze is-10 ℃ to-35 ℃, the antifreeze with different freezing points comprises components with different volumes, the specific heat capacity of the antifreeze is 3.50-3.76J/(g DEG C), the viscosity of the antifreeze is 2.05-3.13 mPa & S, and the pH of the antifreeze is 8.49-9.23. The antifreeze liquid with different freezing points can be prepared by changing the volume fractions of the components, and the specific heat capacity of the antifreeze liquid is similar to that of water, so that more heat can be taken away; the anti-freezing solution has low viscosity, flows in the water tank quickly and takes away more heat; the pH value of the anti-freezing solution is alkaline, so that acidic substances generated by the anti-freezing solution can be neutralized, and the corrosion to a water tank is slowed down. The antifreezing solution can meet the requirement of internal combustion engines with different environmental temperatures on the antifreezing solution, avoid the excess performance of the antifreezing solution and reduce the purchasing cost.
Detailed Description
In order to make the technical solutions and advantages of the present application more clear, the following describes the embodiments of the present application in further detail.
The embodiment of the application provides an antifreezing solution, which comprises the following components in percentage by volume:
25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water;
wherein the freezing point range of the antifreeze is-10 ℃ to-35 ℃, and the antifreeze with different freezing points comprises components with different volume fractions;
the specific heat capacity of the antifreeze is 3.50-3.76J/(g ℃); the viscosity of the antifreeze is 2.05-3.13 mPa & S; the pH value of the antifreeze is 8.49-9.23.
Different regions have different ambient temperatures, and therefore, different ambient temperatures have different requirements for antifreeze. For example, in the Chongqing area, tall mountains and plateaus around the Chongqing area block the invasion of cold tides, no summer heat and no severe cold exist in the area, the average temperature in summer is between 24 and 28 ℃, and the highest temperature is between 36 and 42 ℃; the average temperature in winter is between 4 ℃ and 8 ℃, and the lowest temperature is-8 ℃ to-2 ℃. Therefore, the freezing point of the antifreeze required by the area is less than-8 ℃, but the difference between the freezing point and-8 ℃ is not great.
The freezing point of the finished antifreeze in the related technology is generally-45 ℃, and for the regions in China, the freezing point of the antifreeze is far lower than the lowest temperature of the coldest regions in China, so that the antifreeze has excessive performance and overhigh purchase cost. In the embodiment of the application, the antifreezing solution with different freezing points can be prepared by changing the volume fractions of the components, and the antifreezing solution is suitable for internal combustion engines with different environmental temperatures, so that the requirement of the internal combustion engines with different environmental temperatures on the antifreezing solution is met, the phenomenon that the performance of the antifreezing solution is excessive is avoided, and the purchasing cost is reduced.
Introduction of ethylene glycol: the antifreezing fluid generally consists of three parts of water, an antifreezing agent and an additive, and can be divided into three types of alcohol type, glycerin type and glycol type according to different components of the antifreezing agent. In the embodiment of the application, ethylene glycol is used as an antifreezing agent, and has the properties of high boiling point, good low-temperature performance, corrosion resistance, scale inhibition and the like, so that the water tank can be prevented from being frozen in winter, and the water tank can be prevented from boiling in summer.
Introduction of Lan-826 general pickling corrosion inhibitor: in the embodiment of the application, the Lan-826 general pickling corrosion inhibitor can be used as a corrosion inhibitor to slow down corrosion of an antifreeze solution to metals in a water tank, and has a good corrosion inhibition effect.
Introduction of sodium molybdate: sodium molybdate is also a corrosion inhibitor, and in the embodiment of the application, the sodium molybdate and the Lan-826 general pickling corrosion inhibitor are adopted to act synergistically to slow down the corrosion of the antifreeze solution on metals in a water tank, so that the corrosion rate of the antifreeze solution on the metals reaches the national standard.
Introduction of hydrolyzed polymaleic anhydride: the hydrolyzed polymaleic anhydride has good high-temperature resistance, and a certain amount of hydrolyzed polymaleic anhydride is added into the antifreeze provided by the embodiment of the application, so that the boiling point of the antifreeze can be increased, and a water tank is prevented from boiling in summer.
In addition, the anti-freezing solution is easy to scale in the water tank, and the main component of the scale is calcium carbonate. The hydrolyzed polymaleic anhydride has good scale inhibition and dispersion effects on calcium carbonate, and the scale inhibition time is long. Therefore, a certain amount of hydrolyzed polymaleic anhydride is added into the antifreeze, so that the scale inhibition performance of the antifreeze can be improved, and the water tank is prevented from scaling to influence the heat dissipation of the internal combustion engine.
Introduction of deionized water: since tap water contains a large amount of inorganic ions, scale is easily generated during use. The scale can restrict the flow of antifreeze in the water tank, reduce the heat dissipation effect, lead to the cylinder block overheated, damage the internal-combustion engine when serious. Therefore, in the antifreeze provided by the embodiment of the application, deionized water for removing inorganic ions in water is adopted, so that the generation of scale can be slowed down to a certain extent.
The antifreeze provided by the embodiment of the application comprises the following components in percentage by volume: 25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water. The freezing point range of the antifreeze is-10 ℃ to-35 ℃, the antifreeze with different freezing points comprises components with different volumes, the specific heat capacity of the antifreeze is 3.50-3.76J/(g DEG C), the viscosity of the antifreeze is 2.05-3.13 mPa & S, and the pH of the antifreeze is 8.49-9.23. The antifreeze liquid with different freezing points can be prepared by changing the volume fractions of the components, and the specific heat capacity of the antifreeze liquid is similar to that of water, so that more heat can be taken away; the anti-freezing solution has low viscosity, flows in the water tank quickly and takes away more heat; the pH value of the anti-freezing solution is alkaline, so that acidic substances generated by the anti-freezing solution can be neutralized, and the corrosion to a water tank is slowed down. The antifreezing solution can meet the requirement of internal combustion engines with different environmental temperatures on the antifreezing solution, avoid the excess performance of the antifreezing solution and reduce the purchasing cost.
In the embodiment of the present application, the volume fraction of the ethylene glycol may be set and changed as needed, for example, the volume fraction of the ethylene glycol may be: 25%, 28%, 30%, 35%, 37%, 40%, 42%, 45%, 48%, 50%, 52%. The volume fraction of the Lan-826 general pickling corrosion inhibitor can be set and changed according to needs, for example, the volume fraction of the Lan-826 general pickling corrosion inhibitor can be: 1%, 1.5%, 2%, 2.5%, 2.8%, 3%. The volume fraction of sodium molybdate may be set and modified as desired, for example, the volume fraction of sodium molybdate may be: 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%. The volume fraction of hydrolyzed polymaleic anhydride can be set and modified as desired, for example, the volume fraction of hydrolyzed polymaleic anhydride can be: 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%.
Introduction of hydroxypropyl- β -cyclodextrin: in one possible implementation, the antifreeze further includes: hydroxypropyl-beta-cyclodextrin;
the volume fraction of the hydroxypropyl-beta-cyclodextrin is 0.5 to 1 percent.
In the examples of the present application, hydroxypropyl- β -cyclodextrin acts as a solubilizer, which increases the solubility of the remaining components in deionized water and ethylene glycol. Also, the volume fraction of hydroxypropyl- β -cyclodextrin can be set and changed as desired, for example, the volume fraction of hydroxypropyl- β -cyclodextrin can be: 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%.
Introduction of glutaraldehyde: in one possible implementation, the antifreeze further includes: glutaraldehyde;
the volume fraction of the glutaraldehyde is 0.5-1%.
In the embodiment of the application, glutaraldehyde is used as a bactericide, so that microorganisms in the anti-freezing solution can be killed, and the microorganisms are prevented from corroding the internal combustion engine. Also, the volume fraction of glutaraldehyde may be set and changed as needed, for example, the volume fraction of glutaraldehyde may be: 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%.
In the embodiment of the application, the freezing point range of the anti-freezing solution is-10 ℃ to-35 ℃, and anti-freezing solutions with different freezing points comprise components with different volume fractions. For example, the lowest temperature in winter in the Chongqing area is-8 ℃, in the embodiment of the application, the antifreeze with the freezing point of-15 ℃ can be prepared by changing the volume fraction of each component, so that the use requirement of the area is met. For example, the minimum temperature in Xinjiang area in winter is-15 ℃, in the embodiment of the application, the antifreeze with the freezing point of-25 ℃ can be prepared by changing the volume fraction of each component, so as to meet the use requirement of the area. For another example, the lowest winter temperature in the northeast region is-25 ℃, in the embodiment of the application, the antifreeze with the freezing point of-35 ℃ can be prepared by changing the volume fraction of each component, so that the use requirement of the region can be met. The freezing point of the antifreeze can be any value within the range of-5 ℃ to-35 ℃, and in the embodiment of the application, the freezing point of the antifreeze is only described as-15 ℃, 25 ℃ and-35 ℃.
In the embodiment of the application, when the freezing point of the anti-freezing solution is-15 ℃, the anti-freezing solution comprises the following components in percentage by volume: 28 to 35 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolyzed polymaleic anhydride, 0.5 to 1 percent of hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of glutaraldehyde and the balance of deionized water.
When the freezing point of the antifreeze is-25 ℃, the antifreeze comprises the following components in percentage by volume: 37 to 42 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolyzed polymaleic anhydride, 0.5 to 1 percent of hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of glutaraldehyde and the balance of deionized water.
When the freezing point of the antifreeze is-35 ℃, the antifreeze comprises the following components in percentage by volume: 45 to 50 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolyzed polymaleic anhydride, 0.5 to 1 percent of hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of glutaraldehyde and the balance of deionized water.
It should be noted that the higher the boiling point of the anti-freezing liquid is, the less the water tank is prone to boiling when the internal combustion engine is running. In the embodiment of the application, the boiling point of the obtained anti-freezing solution is between 98.5 and 102.3 ℃ by adjusting the volume fraction of each component, so that the phenomenon of boiling in a water tank can be avoided.
The specific heat capacity refers to the heat absorbed or released by the antifreeze per unit mass at a unit temperature, and the larger the specific heat capacity of the antifreeze is, the more heat the antifreeze per unit mass can take away, and the better the cooling effect is. In the embodiment of the application, by adjusting the volume fractions of the components, the specific heat capacity of the obtained antifreeze is 3.50-3.76J/(g.DEG C), and the specific heat capacity of water is 4.2J/(g.DEG C), which can be seen that: the specific heat capacity of the antifreezing solution is close to that of water, so that heat generated by the cylinder body can be taken away in time.
The viscosity can represent the flowing difficulty of the anti-freezing solution, and the higher the viscosity, the slower the flowing speed of the anti-freezing solution is, and the less heat is taken away. The viscosity measurement method can be divided into absolute viscosity and relative viscosity, the absolute viscosity is divided into dynamic viscosity and kinematic viscosity, in the embodiment of the application, the absolute viscosity is used for measuring the flowing difficulty of the anti-freezing solution, and the kinematic viscosity is used for expression. The viscosity of the antifreeze solution is 2.05 to 3.13 mPas. It can be seen that: the viscosity of the antifreeze is low, so that the flowing speed is high, and more heat can be taken away.
The pH (hydrogen ion concentration index) is an index of the pH value of the solution, the acid solution is easy to corrode metals, and if the alkalinity is too strong, the metal surface is easy to scale, so that the antifreeze can generate acidic substances during working and influence the performance of the antifreeze.
At present, the price of finished antifreeze solution in the market is 13000 yuan/ton, taking southwest oil and gas field division as an example, about 348 internal combustion engines are available in the whole division, and 130 tons of antifreeze solution are consumed annually, so that the production and operation cost is 169 ten thousand yuan/year. The price of the ethylene glycol superior product used in the embodiment of the application is 6000 yuan/ton, the price of the Lan-826 general pickling corrosion inhibitor is 23200 yuan/ton, the price of the hydrolyzed polymaleic anhydride is 6800 yuan/ton, the price of the sodium molybdate is 3400 yuan/ton, the price of the hydroxypropyl-beta-cyclodextrin is 24000 yuan/ton, the price of the glutaraldehyde is 8000 yuan/ton, and the price of the deionized water is 1000 yuan/ton. The antifreeze solution is prepared according to the volume fraction of 35 percent of glycol, 1 percent of Lan-826 general pickling corrosion inhibitor, 0.5 percent of hydrolyzed polymaleic anhydride, 0.5 percent of sodium molybdate, 0.5 percent of hydroxypropyl-beta-cyclodextrin, 0.5 percent of glutaraldehyde and 62 percent of deionized water, the price of the antifreeze solution is only 3160 yuan/ton, the production and operation cost is about 41 ten thousand yuan/year, and compared with the finished antifreeze solution, the antifreeze solution can save the production cost by about 120 ten thousand yuan each year. Under the great prospect of the national great promotion of resource-saving and environment-friendly economic construction, the prepared antifreezing solution which is low in cost and meets the standard has great significance for improving the efficiency of the internal combustion engine.
Another point to be noted is that the finished antifreeze in the related art is sometimes not suitable for some models. For example, southwestern oil and gas field division C15 diesel engine, manufactured by cartettler corporation, has been used after commissioning with finished antifreeze solution. After the unit normally operates for 19000 hours, the lower sealing parts of the three power cylinder sleeves are corroded to different degrees, and the average depth is 2 mm. The lower seal of the power cylinder sleeve is mainly used for sealing a cooling water channel of an engine body, and the periphery of the cylinder sleeve is covered by the antifreeze, so that the corrosion near the lower seal of the power cylinder sleeve is directly related to the antifreeze.
In the embodiment of the present application, the corrosion performance of the antifreeze on the cast iron test piece was also studied. The internal combustion engine was generally made of cast iron, and when the antifreeze solution according to the embodiment of the present invention was not added, the corrosion rate of the cast iron test piece was 0.2184mm/a when only water was added, whereas the corrosion rate was significantly reduced when the antifreeze solution according to the embodiment of the present invention was used. Wherein, the antifreeze with the freezing point of-15 ℃ is used and comprises the following components by volume fraction: 28-35% of ethylene glycol, 1-3% of Lan-826 general acid pickling corrosion inhibitor, 0.5-1% of sodium molybdate, 0.5-1% of hydrolyzed polymaleic anhydride, 0.5-1% of hydroxypropyl-beta-cyclodextrin, 0.5-1% of glutaraldehyde and the balance of deionized water, wherein the corrosion rate of the antifreeze solution on the cast iron test piece is 0.0449mm/a, and the corrosion inhibition rate is 79.45%. It can thus be seen that: the antifreezing solution greatly reduces the corrosion rate of the cast iron test piece.
In addition, the anti-freezing solution provided by the embodiment of the application has good corrosion and scale inhibition effects, and the scale formation rate of the anti-freezing solution meets the national standard through detection; the internal combustion engine of the southwest oil and gas field, such as a fuel engine and a gas engine, has no scaling phenomenon after field test. Therefore, the antifreezing solution can be popularized and applied to gasoline engines and diesel engines, and has wide application prospects.
The embodiment of the application also provides a preparation method of the anti-freezing solution, which comprises the following steps:
step 1: adding ethylene glycol and deionized water into a stirrer according to the volume fraction of each component, and uniformly stirring.
The volume fractions of the components are respectively as follows: 25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride, 0.5 to 1 percent of hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of glutaraldehyde and the balance of deionized water.
According to the volume fractions of the components, 25-52 percent of ethylene glycol and deionized water with corresponding volume fractions are added into a stirrer and then stirred uniformly.
Step 2: adding a Lan-826 general pickling corrosion inhibitor, sodium molybdate and hydrolyzed polymaleic anhydride into a stirrer, and uniformly stirring to obtain the antifreezing solution.
Adding 1-3% by volume of Lan-826 general acid pickling corrosion inhibitor, 0.5-1% by volume of sodium molybdate and 0.5-1% by volume of hydrolytic polymaleic anhydride into a stirrer added with glycol and water to obtain the antifreeze.
When the antifreeze also comprises hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of hydroxypropyl-beta-cyclodextrin is also added into the stirrer; when the antifreeze also comprises glutaraldehyde, 0.5-1% of glutaraldehyde is also added into the stirrer.
When the anti-freezing solution is used, solid particles and scale in a cooling water system of the internal combustion engine, namely a water tank, are removed, the original finished anti-freezing solution in the water tank is drained, deionized water is fully added, then the water tank idles for 8 hours, and finally the deionized water is discharged into the water tank. After the antifreeze provided by the embodiment of the application is prepared according to the corresponding volume fraction, the antifreeze is added into a water tank, so that the whole water tank is filled with the antifreeze.
In conclusion, the preparation method of the anti-freezing solution is simple, and the on-site real-time preparation can be realized.
The above description is only for facilitating the understanding of the technical solutions of the present application by those skilled in the art, and is not intended to limit the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. The anti-freezing solution is characterized by comprising the following components in percentage by volume:
25 to 52 percent of ethylene glycol, 1 to 3 percent of Lan-826 general acid pickling corrosion inhibitor, 0.5 to 1 percent of sodium molybdate, 0.5 to 1 percent of hydrolytic polymaleic anhydride and the balance of deionized water;
the freezing point range of the anti-freezing solution is-10 ℃ to-35 ℃, and the anti-freezing solutions with different freezing points comprise components with different volume fractions;
the specific heat capacity of the antifreeze is 3.50-3.76J/(g DEG C), the viscosity of the antifreeze is 2.05-3.13 mPa.S, and the hydrogen ion concentration index pH of the antifreeze is 8.49-9.23.
2. The antifreeze of claim 1, further comprising: hydroxypropyl-beta-cyclodextrin;
the volume fraction of the hydroxypropyl-beta-cyclodextrin is 0.5-1%.
3. The antifreeze of claim 2, further comprising: glutaraldehyde;
the volume fraction of the glutaraldehyde is 0.5-1%.
4. The antifreeze of claim 3, wherein when the freezing point of said antifreeze is-15 ℃, said antifreeze comprises the following components in volume fraction:
28 to 35 percent of the ethylene glycol, 1 to 3 percent of the Lan-826 general pickling corrosion inhibitor, 0.5 to 1 percent of the sodium molybdate, 0.5 to 1 percent of the hydrolyzed polymaleic anhydride, 0.5 to 1 percent of the hydroxypropyl-beta-cyclodextrin, 0.5 to 1 percent of the glutaraldehyde and the balance of the deionized water.
5. The antifreeze of claim 4, wherein said antifreeze is suitable for use with internal combustion engines having ambient temperatures greater than-15 ℃.
6. The antifreeze of claim 3, wherein when the freezing point of said antifreeze is-25 ℃, said antifreeze comprises the following components in volume fraction:
37-42% of ethylene glycol, 1-3% of Lan-826 general pickling corrosion inhibitor, 0.5-1% of sodium molybdate, 0.5-1% of hydrolyzed polymaleic anhydride, 0.5-1% of hydroxypropyl-beta-cyclodextrin, 0.5-1% of glutaraldehyde and the balance of deionized water.
7. The antifreeze of claim 6, wherein said antifreeze is suitable for use with internal combustion engines having ambient temperatures greater than-25 ℃.
8. The antifreeze of claim 3, wherein when the freezing point of said antifreeze is-35 ℃, said antifreeze comprises the following components in volume fraction:
45-50% of ethylene glycol, 1-3% of Lan-826 general acid pickling corrosion inhibitor, 0.5-1% of sodium molybdate, 0.5-1% of hydrolyzed polymaleic anhydride, 0.5-1% of hydroxypropyl-beta-cyclodextrin, 0.5-1% of glutaraldehyde and the balance of deionized water.
9. The antifreeze of claim 8, wherein said antifreeze is suitable for use with internal combustion engines having ambient temperatures greater than-35 ℃.
10. The method for preparing an anti-icing fluid according to any one of claims 1 to 9, characterized in that said method comprises:
adding ethylene glycol and deionized water into a stirrer according to the volume fraction of the components, and uniformly stirring;
adding a Lan-826 general pickling corrosion inhibitor, sodium molybdate and hydrolyzed polymaleic anhydride into the stirrer, and uniformly stirring to obtain the antifreezing solution.
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| CN201911093534.2A CN112778981A (en) | 2019-11-11 | 2019-11-11 | Antifreezing solution and preparation method thereof |
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Application publication date: 20210511 |