Green and environment-friendly deicing anti-freezing solution as well as preparation method and application thereof

Abstract

The invention discloses a green and environment-friendly deicing anti-freezing solution as well as a preparation method and application thereof, and the green and environment-friendly deicing anti-freezing solution mainly comprises the following components in percentage by mass: 44%-45% of propylene glycol, 6%-12% of an anti-freezing agent, 1%-4% of a preservative and 0.1%-0.3% of a thickening agent. Propylene glycol is used as a core component, has a low freezing point of-59 DEG C, can effectively prevent coal from being frozen in the transportation process, has good biodegradability and biocompatibility, and causes little pollution to the environment. The freezing point is further reduced by the anti-freezing agent, so that the coal car compartment is prevented from freezing in a low-temperature environment. And the preservative can form a protective film on the surface of the vehicle to delay corrosion and ensure that the anti-freezing solution does not mildew within 2-3 years. And the thickening agent forms a protective film on the contact surfaces of the coal and the carriage, so that the adhesive force is enhanced, and the anti-freezing solution is more lasting and effective in severe weather.

Description

Technical Field

[0001] The invention belongs to the technical field of deicing and antifreeze fluids, and relates to a green and environment-friendly deicing and antifreeze fluid, a preparation method thereof, and an application thereof. Background Art

[0002] With the continuous development of the coal transportation industry, the performance requirements for the deicing and antifreeze used in transportation are becoming increasingly diverse and stringent. Coal transportation involves a variety of complex environments, especially in cold areas or in winter, where low temperature conditions pose a severe challenge to the loading and unloading of coal. Coal transportation vehicles need to travel long distances under different climatic conditions and often encounter extremely cold weather. Once the extremely cold weather reaches the freezing point, the freezing intensity of coal and the car wall is relatively large. During the unloading process of the train at the station, it is difficult to separate the coal from the bottom and side walls of the car, resulting in a large amount of frozen coal. Some components in traditional deicing and antifreeze will produce toxic and harmful gases when burned with coal, polluting the atmospheric environment. In addition, some deicing and antifreeze on the market contain harmful elements such as chlorine and phosphorus, which brings new problems to the subsequent use of coal. When the use of chlorine-containing coal antifreeze reaches a certain concentration, it will corrode transportation, production, and coal-burning equipment. In addition, once a leak occurs, it may also cause serious pollution to the soil and water. Therefore, it is necessary to develop non-toxic and harmless green and environmentally friendly deicing and antifreeze.

[0003] The deicing and antifreeze in the prior art is highly corrosive, and will obviously corrode the metal parts of the transport vehicle during the coal transportation process, and may even cause large areas of rust on the parts and make them scrapped. In addition, most of the deicing and antifreeze on the market are chloride-type deicing and antifreeze, nitrite-type deicing and antifreeze, or deicing and antifreeze containing other harmful ingredients, such as the Chinese patent application "A nano-type energy-saving and environmentally friendly antifreeze for automobiles and its preparation method" with publication number CN115044354A, but the invention contains nitrite. Nitrite-type deicing and antifreeze may enter the environment due to leakage or discharge during use, causing potential harm to soil, water sources and ecosystems. These chemical substances are not easy to degrade in the environment, may exist and accumulate for a long time, and thus have an adverse effect on biodiversity and ecological balance. Nitrite itself has certain toxicity and may cause harm to both aquatic and terrestrial organisms. If nitrite-type antifreeze enters the water body, it may cause poisoning of aquatic organisms, affect their growth and reproduction, and then damage the entire aquatic ecosystem. In addition, nitrite may also be transmitted through the food chain, posing a potential threat to human health. Chloride-based deicing and antifreeze fluids mainly rely on salt ions and water molecules to form hydrated ions to adjust the internal structure of water molecules to lower the freezing point. Most deicing and antifreeze fluids on the market currently have a freezing point of about -30°C. For example, the Chinese patent application with publication number CN107312505A, "An environmentally friendly antifreeze fluid for vehicles and its preparation method", has a freezing point of only -20°C, which cannot meet the antifreeze use needs in some areas with lower temperatures. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a green and environmentally friendly deicing antifreeze fluid and a preparation method and application thereof, thereby solving the technical problems that the existing antifreeze fluid is highly corrosive, contains harmful ingredients that pollute the environment, and has a low freezing point and cannot be used in areas with lower temperatures.

[0005] The present invention is achieved through the following technical solutions: A green and environment-friendly deicing antifreeze fluid comprises, by mass fraction, 44% to 45% of propylene glycol, 4% to 12% of antifreeze agent, 1% to 4% of preservative, 0.1% to 0.3% of thickener and the balance of water.

[0006] Preferably, by mass fraction, the composition includes 42.7% to 44.8% propylene glycol, 4.7% to 12% antifreeze, 1.5% to 2.4% preservative, 0.12% to 0.18% thickener and the balance water.

[0007] Preferably, by mass fraction, the mixture includes 43.15% propylene glycol, 11.27% antifreeze, 1.5% preservative, 0.13% thickener, and the balance water.

[0008] Preferably, the antifreeze agent is at least one of diethylene glycol, ethylene glycol, polyethylene glycol and butanediol.

[0009] Preferably, the preservative is at least one of calcium propionate, triethanolamine, sodium propionate and kason.

[0010] Preferably, the thickener is at least one of carrageenan, gum arabic, gellan gum, sodium alginate and xanthan gum.

[0011] The above-mentioned method for preparing the green and environmentally friendly deicing antifreeze fluid is prepared by adding propylene glycol, antifreeze agent, preservative and thickener into water according to mass fraction and stirring.

[0012] Preferably, the stirring temperature is 25-50° C. and the stirring time is 10-30 min.

[0013] Preferably, the stirring speed is 300-500 rpm.

[0014] The above-mentioned green and environmentally friendly deicing and antifreeze fluid is used to prevent coal from freezing.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: The invention discloses a green and environment-friendly deicing antifreeze liquid, wherein the additives in the liquid include 44% to 45% propylene glycol. The propylene glycol is used as an anticoagulant. The propylene glycol has a low freezing point of -59°C, which can effectively protect coal transport vehicles from being affected by low temperature environments and prevent coal from freezing during transportation. The propylene glycol reduces the freezing point by changing the arrangement state of solvent molecules, interfering with the normal crystallization process and destroying the order of ice crystal structure constructed by water by its own hydrogen bonds, thereby hindering the growth and formation of ice crystals. In addition, the propylene glycol has good biodegradability and biocompatibility. In the natural environment, it can be decomposed into harmless substances such as carbon dioxide and water by microorganisms at a relatively fast speed, and the pollution to the environment is small. For example, in the soil, microorganisms can quickly decompose it, and it will not remain for a long time like some difficult-to-degrade chemical substances, affecting the soil structure and ecological balance. The antifreeze agent reduces the freezing point and prevents the compartment of the coal transport vehicle from freezing in a low temperature environment. The preservative can form a protective film on the surface of the transport vehicle to delay the corrosion of the corresponding parts. During the storage of antifreeze, a small amount of preservatives is added to ensure that the antifreeze does not mold during the 2-3 year storage period. Thickeners can form a protective film on the contact surface between coal and the carriage, enhancing the adhesion of antifreeze on the coal and the carriage, making it less likely to be washed away in rainy weather, and thus increasing the duration of its effectiveness.

[0016] Furthermore, calculated by mass fraction, it includes 42.7% to 44.8% propylene glycol, 4.7% to 12% antifreeze, 1.5% to 2.4% preservative, 0.12% to 0.18% thickener and the remainder water. At this component content, propylene glycol, antifreeze and preservative can fully play their roles. Too much content will increase the cost, and too little content will reduce the effect of the deicing antifreeze. When the thickener content is less than 0.12%, the deicing antifreeze will not easily stick to the wall, reducing the duration of the antifreeze to work. When the thickener content is greater than 0.18%, it will affect the fluidity of the antifreeze and reduce the effect of the deicing antifreeze.

[0017] Furthermore, based on the mass fraction, 43.15% propylene glycol, 11.27% antifreeze, 1.5% preservative, 0.13% thickener and the balance water, this composition ratio can effectively improve the effect of the antifreeze.

[0018] Furthermore, the antifreeze is at least one of diethylene glycol, ethylene glycol, polyethylene glycol and butanediol, so that the coal transport vehicle compartment is not easy to freeze in a low-temperature environment, and the antifreeze used is almost non-toxic and has little harm to the human body and organisms in the environment. During use, even if a small amount of leakage occurs, it will not cause serious pollution to the soil, water sources, etc., and the impact on the ecological environment is relatively small.

[0019] Furthermore, the preservative is at least one of calcium propionate, triethanolamine, sodium propionate and kason. During the storage of the antifreeze, a trace amount of preservative is added to ensure that the antifreeze does not mold during the storage period of 2 to 3 years. The preservative used has excellent biocompatibility, is almost harmless to the environment and human body, and can be directly discharged.

[0020] Furthermore, the thickener is at least one of carrageenan, gum arabic, gellan gum, sodium alginate and xanthan gum, which can form a protective film on the coal and the contact surface between the coal and the carriage, enhance the adhesion of the antifreeze on the coal and the carriage, and is not easily washed away in rainy weather, which can increase the duration of its effectiveness; the thickeners used, carrageenan, gum arabic, gellan gum, sodium alginate and xanthan gum, are food-grade thickeners with good biodegradability and environmental compatibility, and have a lower risk of environmental pollution than some traditional thickeners.

[0021] In addition, the present invention also discloses a method for preparing the above-mentioned green and environmentally friendly deicing antifreeze liquid, which is prepared by adding propylene glycol, antifreeze agent, preservative and thickener into water according to mass fraction and stirring. The process is simple to operate and does not require complicated chemical reaction equipment. It can be completed in a general chemical mixing and stirring container and is suitable for large-scale production.

[0022] Furthermore, the stirring temperature is 25-50° C. and the stirring time is 10-30 min. This time range is sufficient to fully mix the components, which can save time and facilitate mass production under the same level of demand.

[0023] Furthermore, the stirring speed is 300-500 r, within which the components can be fully mixed, so that the preparation conditions are simple and easy to mass produce. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to understand the characteristics and effects of the present invention, the following is a general description and definition of the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used in the text are the common meanings understood by those skilled in the art for the present invention. In the event of a conflict, the definition in this specification shall prevail.

[0025] The theories or mechanisms described and disclosed herein, whether correct or incorrect, should not limit the scope of the present invention in any way, that is, the present invention can be implemented without being limited by any specific theory or mechanism.

[0026] In this article, all features such as values, quantities, contents and concentrations defined in the form of numerical ranges or percentage ranges are for simplicity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to have included and specifically disclosed all possible secondary ranges and individual values ​​within the range (including integers and fractions).

[0027] In this document, unless otherwise specified, “includes,” “including,” “contains,” “has,” or similar terms cover the meanings of “consisting of” and “mainly consisting of,” for example, “A includes a” covers the meanings of “A includes a and other” and “A only includes a.”

[0028] In this document, in order to make the description concise, not all possible combinations of various technical features in various embodiments or examples are described. Therefore, as long as there is no contradiction in the combination of these technical features, the various technical features in various embodiments or examples can be combined arbitrarily, and all possible combinations should be considered to be within the scope of this specification.

[0029] The invention provides a green and environment-friendly deicing antifreeze liquid, which comprises, by mass fraction, 44% to 45% of propylene glycol, 4% to 12% of antifreeze agent, 1% to 4% of preservative, 0.1% to 0.3% of thickener and the balance of water.

[0030] More preferably, based on mass fraction, the composition includes 42.7% to 44.8% propylene glycol, 4.7% to 12% antifreeze, 1.5% to 2.4% preservative, 0.12% to 0.18% thickener and the balance water.

[0031] More preferably, based on mass fraction, the mixture includes 43.15% propylene glycol, 11.27% antifreeze, 1.5% preservative, 0.13% thickener, and the balance water.

[0032] The antifreeze agent is at least one of diethylene glycol, ethylene glycol, polyethylene glycol and butanediol.

[0033] The preservative is at least one of calcium propionate, triethanolamine, sodium propionate and kason.

[0034] The thickener is at least one of carrageenan, gum arabic, gellan gum, sodium alginate and xanthan gum.

[0035] The above-mentioned green and environmentally friendly deicing antifreeze fluid preparation method is prepared by adding propylene glycol, antifreeze agent, preservative and thickener into water according to mass fraction, and stirring at 25-50° C. for 10-30 min. The stirring speed is 300-500 r.

[0036] The invention discloses a green and environmentally friendly deicing antifreeze liquid. The deicing antifreeze liquid uses an anticoagulant propylene glycol to lower the freezing point. The propylene glycol has a relatively low freezing point of -59°C, which can effectively protect coal transport vehicles from being affected by low temperature environments and prevent freezing during coal transportation. Propylene glycol has good biodegradability and biocompatibility. In the natural environment, it can be quickly decomposed into harmless substances such as carbon dioxide and water by microorganisms, and has little pollution to the environment. For example, in the soil, microorganisms can quickly decompose it, and it will not remain for a long time like some difficult-to-degrade chemical substances, affecting the soil structure and ecological balance. Antifreeze agents such as diethylene glycol, ethylene glycol, polyethylene glycol, and butanediol are used to lower the freezing point to prevent the coal transport vehicle compartment from freezing in a low temperature environment. The antifreeze involved in the invention is almost non-toxic, has little harm to human body and biological organisms in the environment, and during use, even if a small amount of leakage occurs, it will not cause serious pollution to soil, water sources, etc., and the impact on the ecological environment is relatively small. The preservatives used, such as calcium propionate, triethanolamine, sodium propionate, and kason, are food-grade preservatives, have excellent biocompatibility, are almost harmless to the environment and human body, and can be directly discharged. The preservatives involved in the present invention can form a protective film on the surface of the transport vehicle to delay the corrosion of the corresponding parts. During the storage of the antifreeze, a trace amount of preservative is added to ensure that the antifreeze does not mold during the 2-3 year storage period. The thickeners used, such as carrageenan, gum arabic, gellan gum, sodium alginate, and xanthan gum, can form a protective film on the contact surface of coal and coal and the carriage, enhance the adhesion of the antifreeze on the coal and the carriage, and are not easily washed away in rainy weather, which can increase the duration of its function. The thickeners used, such as carrageenan, gum arabic, gellan gum, sodium alginate, and xanthan gum, are food-grade thickeners, have good biodegradability and environmental compatibility, and have a lower risk of environmental pollution than some traditional thickeners. The invention is convenient to prepare and has reasonable process design. The prepared deicing and antifreeze fluid is harmless to the environment and human body and is green and environmentally friendly. It has important theoretical value and practical significance for solving the problem of coal freezing during coal transportation.

[0037] Another inventive point of the present invention is that the deicing antifreeze liquid is non-toxic and harmless. The deicing antifreeze liquid does not contain toxic substances and other dangerous components, and is harmless to the environment and human body. It will not cause pollution to the environment after use, which meets the environmental protection requirements of modern society. The deicing antifreeze liquid described in the present invention usually has a long service life, which helps to reduce costs. The deicing antifreeze liquid has a good anti-corrosion protection effect on the components of the carriage of the transport vehicle, and can extend the service life of the carriage. Compared with the traditional deicing antifreeze liquid, which is complicated to prepare, highly corrosive, and unfriendly to the environment, the green and environmentally friendly deicing antifreeze liquid provided by the present invention has a simple entire preparation process and is easy to scale up.

[0038] The deicing and antifreeze liquid of the present invention does not contain harmful components such as chlorine and nitrite, and is a green and environmentally friendly deicing and antifreeze liquid. Its performance meets the requirements of the industry standard TB / T 3208-2008 "Technical Conditions for Antifreeze Liquid for Bulk Granular Cargo Transportation" of the Ministry of Railways, and ensures the antifreeze effect. It has low corrosion to metal materials, is non-toxic and pollution-free, and has no adverse effects on operators and the environment. The green and environmentally friendly deicing and antifreeze liquid of the present invention is colorless and transparent, has no obvious irritating odor, has a pH of 6.5-8.3, a freezing point of ≤-55°C, a flash point of >120°C, and its metal corrosion is measured as follows: steel ≤0.05mm / a, copper ≤0.05mm / a, aluminum ≤0.05mm / a, rat oral LD50>15000mg / kg, and has no effect on organic coatings on coal transportation vehicles.

[0039] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0040] The following examples use conventional instruments and equipment in the art. The experimental methods in the following examples where specific conditions are not specified are usually carried out under conventional conditions or under conditions recommended by the manufacturer. The various raw materials used in the following examples are conventional commercial products unless otherwise specified, and their specifications are conventional specifications in the art. In the specification of the present invention and the following examples, unless otherwise specified, "%" means weight percentage, "part" means weight part, and ratio means weight ratio.

[0041] Example 1 The green and environment-friendly deicing and antifreeze fluid of this embodiment includes the following components in mass fractions: 44% of anticoagulant propylene glycol, 7.88% of antifreeze agent diethylene glycol, 2% of preservative calcium propionate, 0.12% of thickener carrageenan and 46% of water.

[0042] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan, and water into the reaction container in sequence under stirring, heat at 30° C., stir at a speed of 300 r for 30 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0043] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 6.8, freezing point = -56°C, flash point = 122°C, and its metal corrosion resistance was measured: steel = 0.04mm / a, copper = 0.04mm / a, aluminum = 0.05mm / a, rat oral LD50 = 15500mg / kg, and had no effect on organic coatings on coal transportation vehicles.

[0044] Example 2 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 42.7% of antifreeze agent propylene glycol, 11.95% of antifreeze agent diethylene glycol, 2.2% of preservative calcium propionate, 0.15% of thickener carrageenan, and 43% of water.

[0045] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan, and water into the reaction container in sequence under stirring, heat at 50° C., stir at a rate of 500 r for 10 min, and then cool to room temperature to obtain a green and environmentally friendly deicing and antifreeze liquid.

[0046] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 6.7, freezing point = -58°C, flash point = 121°C, and its metal corrosion resistance was measured as follows: steel = 0.04 mm / a, copper = 0.05 mm / a, aluminum = 0.04 mm / a, rat oral LD50 = 15700 mg / kg, and had no effect on organic coatings on coal transport vehicles.

[0047] Example 3 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 44.8% of anticoagulant propylene glycol, 4.74% of antifreeze agent diethylene glycol, 2.3% of preservative calcium propionate, 0.16% of thickener carrageenan, and 48% of water.

[0048] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan and water into the reaction container in sequence under stirring, heat at 30° C. with a stirring rate of 350 r for 25 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0049] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention is colorless, has no obvious irritating odor, has a pH value of 6.6, a freezing point of -57°C, a flash point of 123°C, and its metal corrosion resistance was measured as follows: steel = 0.04 mm / a, copper = 0.04 mm / a, aluminum = 0.04 mm / a, rat oral LD50 = 15800 mg / kg, and has no effect on organic coatings on coal transport vehicles.

[0050] Example 4 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 43.4% of anticoagulant propylene glycol, 9.88% of antifreeze agent diethylene glycol, 1.6% of preservative calcium propionate, 0.12% of thickener carrageenan, and 45% of water.

[0051] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan, and water into the reaction container in sequence under stirring, heat at 35° C. at a stirring rate of 400 r for 25 min, and then cool to room temperature to obtain a green and environmentally friendly deicing and antifreeze liquid.

[0052] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 7.2, freezing point = -57°C, flash point = 123°C, and its metal corrosion resistance was measured as follows: steel = 0.05 mm / a, copper = 0.04 mm / a, aluminum = 0.05 mm / a, rat oral LD50 = 15300 mg / kg, and had no effect on organic coatings on coal transport vehicles.

[0053] Example 5 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 43% of anticoagulant propylene glycol, 11.16% of antifreeze agent diethylene glycol, 1.7% of preservative calcium propionate, 0.14% of thickener carrageenan, and 44% of water.

[0054] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan and water into the reaction container in sequence under stirring, heat at 40° C. with a stirring rate of 350 r for 35 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0055] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 7.6, freezing point = -56°C, flash point = 122°C, and its metal corrosion resistance was measured: steel = 0.04mm / a, copper = 0.05mm / a, aluminum = 0.05mm / a, rat oral LD50 = 15800mg / kg, and had no effect on organic coatings on coal transportation vehicles.

[0056] Example 6 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 44.6% of antifreeze agent propylene glycol, 5.82% of antifreeze agent diethylene glycol, 2.4% of preservative calcium propionate, 0.18% of thickener carrageenan, and 47% of water.

[0057] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan and water into the reaction container in sequence under stirring, heat at 45° C. with a stirring rate of 450 r for 50 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0058] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 8, freezing point = -59°C, flash point = 123°C, and its metal corrosion resistance was measured as follows: steel = 0.05 mm / a, copper = 0.05 mm / a, aluminum = 0.04 mm / a, rat oral LD50 = 15500 mg / kg, and had no effect on organic coatings on coal transport vehicles.

[0059] Example 7 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 43.7% of anticoagulant propylene glycol, 7.88% of antifreeze agent diethylene glycol, 2.25% of preservative calcium propionate, 0.17% of thickener carrageenan, and 46% of water.

[0060] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan and water into the reaction container in sequence under stirring, heat at 28° C. at a stirring rate of 370 r for 30 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0061] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 8.2, freezing point = -58°C, flash point = 122°C, and its metal corrosion resistance was measured as follows: steel = 0.05 mm / a, copper = 0.05 mm / a, aluminum = 0.05 mm / a, rat oral LD50 = 15200 mg / kg, and had no effect on organic coatings on coal transport vehicles.

[0062] Example 8 The green and environment-friendly deicing antifreeze fluid of this embodiment includes the following components in mass fractions: 43.1% of anticoagulant propylene glycol, 11.27% of antifreeze agent diethylene glycol, 1.5% of preservative calcium propionate, 0.13% of thickener carrageenan, and 44% of water.

[0063] The preparation method of the deicing and antifreeze liquid in this embodiment is as follows: weigh the materials according to the mass fraction, add propylene glycol, diethylene glycol, calcium propionate, carrageenan and water into the reaction container in sequence under stirring, heat at 43° C. at a stirring rate of 410 r for 15 min, and then cool to room temperature to obtain the green and environmentally friendly deicing and antifreeze liquid.

[0064] The obtained green and environmentally friendly deicing and antifreeze liquid was subjected to performance testing, and the results showed that the deicing and antifreeze liquid prepared by the present invention was colorless, had no obvious irritating odor, pH = 6.6, freezing point = -61°C, flash point = 123°C, and its metal corrosion resistance was measured: steel = 0.04mm / a, copper = 0.05mm / a, aluminum = 0.05mm / a, rat oral LD50 = 15100mg / kg, and had no effect on organic coatings on coal transportation vehicles.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A green and environmentally friendly deicing and antifreeze fluid, characterized in that: Calculated by mass fraction, it includes 44%~45% propylene glycol, 4%~12% antifreeze, 1%~4% preservative, 0.1%~0.3% thickener and the balance water.

2. The green and environmentally friendly deicing and antifreeze liquid according to claim 1, characterized in that: Calculated by mass fraction, it includes 42.7%~44.8% propylene glycol, 4.7%~12% antifreeze, 1.5%~2.4% preservative, 0.12%~0.18% thickener and the balance water.

3. The green and environmentally friendly deicing and antifreeze liquid according to claim 1, characterized in that: Calculated by mass fraction, it includes 43.15% propylene glycol, 11.27% antifreeze, 1.5% preservative, 0.13% thickener, and the balance water.

4. The green and environmentally friendly deicing and antifreeze liquid according to claim 1, characterized in that: The antifreeze agent is at least one of diethylene glycol, ethylene glycol, polyethylene glycol and butanediol.

5. The green and environmentally friendly deicing and antifreeze liquid according to claim 1, characterized in that: The preservative is at least one of calcium propionate, triethanolamine, sodium propionate and kason.

6. The green and environmentally friendly deicing and antifreeze liquid according to claim 1, characterized in that: The thickener is at least one of carrageenan, gum arabic, gellan gum, sodium alginate and xanthan gum.

7. A method for preparing a green and environmentally friendly deicing and antifreeze liquid according to any one of claims 1 to 6, characterized in that: The preparation method is prepared by adding propylene glycol, antifreeze agent, preservative and thickener into water according to mass fraction and stirring the water.

8. The method for preparing a green and environmentally friendly deicing and antifreeze liquid according to claim 7, characterized in that: The stirring temperature is 25-50° C. and the stirring time is 10-30 min.

9. The method for preparing a green and environmentally friendly deicing and antifreeze liquid according to claim 7, characterized in that: The stirring speed is 300-500 r.

10. Use of the green and environmentally friendly deicing and antifreeze liquid according to any one of claims 1 to 6 in preventing coal from freezing.