What percentage of ethylene glycol is in antifreeze? 20

The proportion of ethylene glycol is 40 to 50 percent. When the glycol content is 68, the freezing point can be reduced to -68, and when this limit is exceeded, the freezing point will rise. 40 ethylene glycol and 60 soft water mixed into antifreeze, antifreeze temperature of -25; When ethylene glycol and water account for 50 each in the antifreeze, the antifreeze temperature is -35.

Ethylene glycol antifreeze, ethylene glycol is a colorless and slightly viscous liquid, the boiling point is 197 4, the freezing point is -11 5, and can be mixed with water in any proportion. After mixing, the freezing point is significantly reduced due to the change in the vapor pressure of the cooling water. The degree of its decrease decreases with the increase of ethylene glycol content within a certain range.

Ethylene glycol is mainly used in the production of polyester polyester, polyester resin, hygroscopic agent, plasticizer, surfactant, synthetic fiber, cosmetics and explosives, and is used as a solvent for dyes, inks, etc., antifreeze for the preparation of engines, gas dehydrating agent, manufacturing resin, and can also be used as a wetting agent for cellophane, fiber, leather, and adhesives.

It can produce synthetic resin PET, fiber grade PET is polyester fiber, bottle flake grade PET is used to make mineral water bottles, etc. It can also produce alkyd resin, glyoxal, etc., and is also used as an antifreeze. In addition to being used as an antifreeze for automobiles, it is also used for the transportation of industrial cooling capacity, generally known as a refrigerant, and at the same time, it can also be used as a condensate like water.

Pure ethylene glycol freezing point.

When water is added, the freezing point shows a downward trend, and when ethylene glycol concentration, the freezing point is -68 degrees.

After that, as the proportion of water increases, the freezing point gradually decreases until it reaches 0 degrees.

Therefore, the proportion of ethylene glycol in the antifreeze has a lot to do with the setting of the freezing point, generally speaking, at 50% each, the freezing point is -38 degrees.

The base fluid of the antifreeze consists of water and alcohol. The principle of choosing alcohol is to require a wide range of specific heat and low specific heat and thermal conductivity as close as possible to water. At present, the most commonly used are ethylene glycol and diethylene glycol.

Depending on the region in which it is used, the alcohol content in antifreeze generally ranges from 40% to 60%.

According to the minimum operating temperature required, it is generally determined from 30% to 50%, and the minimum temperature is -35 degrees to -55 degrees.

According to the local minimum temperature -5 degrees ratio, 20 degrees with 40, 25 degrees with 45, 30 degrees with 50, the rest with softened water or distilled water, plus 1 additive.

The formula of ethylene glycol antifreeze is the proportion of ethylene glycol antifreeze, and the proportion of ethylene glycol is 40% to 50%. Antifreeze BAI liquid mixed with 40% ethylene glycol and 60% soft water, and the antifreeze temperature is -25。Antifreeze mixed with 50% ethylene glycol and 50% DU50% soft water, and the antifreeze temperature is -35.

At present, more than 95% of domestic and foreign water-based antifreeze uses ethylene glycol, and compared with tap water, the most significant feature of ethylene glycol is antifreeze, while water cannot be antifreeze. Secondly, ethylene glycol has a high boiling point, low volatility, moderate viscosity and small change with temperature, and good thermal stability. Therefore, glycol-based antifreeze is an ideal coolant.

In addition to antifreeze, antifreeze also has the following advantages:

Anti-corrosion function: The engine and its cooling system are made of metal, including copper, iron, aluminum, steel and solder. These metals come into contact with water at high temperatures, and over time, they will be corroded and rusted.

Antifreeze not only does not corrode the engine cooling system, but also has anti-corrosion and rust removal functions.

The main ingredient of antifreeze on the market is ethylene glycol, which has the characteristics of high boiling point and low freezing point. Antifreeze also contains additives to prevent oxidation of glycol (which can form corrosive by-products), prevent corrosion, prevent foaming, etc.

Summary. Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, I hope this service can help you. It is all ethylene glycol, and antifreeze can be mixed and added.

Antifreeze with the same composition can be used universally. The main components of antifreeze are ethylene glycol, propylene glycol, and diethylene glycol, ethylene glycol is generally green, propylene glycol is red with orange, and diethylene glycol is the blue kind. Antifreeze itself is a colorless and transparent liquid, and the reason why these antifreezes are made in bright colors is mainly to make it easier to distinguish and prevent mistakes.

The main function of antifreeze is to prevent the coolant from freezing and cracking the radiator and freezing the engine block or cover when the cold winter is parked, and when the temperature is high in summer, it can effectively prevent boiling and avoid the phenomenon of boiling the pot. Automobile antifreeze has a large effect, which directly affects the performance and service life of the car. Antifreeze is a substitute for water.

Because it is cold in winter, the water freezes at 0 degrees Celsius. Whereas, antifreeze has a low freezing point and does not freeze.

Can antifreeze that is all ethylene glycol be mixed?

Hello, this question can give you a perfect reply, wait for me to sort out the information, I'm typing, 2-3 minutes, don't finish.

Hello, I am your exclusive technician, attentive, careful, dedicated to answering your car questions, I hope this service can help you. It is all ethylene glycol, and antifreeze can be mixed and added. Antifreeze with the same composition can be used universally.

The main components of antifreeze are ethylene glycol, propylene glycol, and diethylene glycol, ethylene glycol is generally green, propylene glycol is red with orange, and diethylene glycol is the blue kind. Antifreeze itself is a colorless and transparent liquid, and the reason why these antifreezes are made in bright colors is mainly to make it easier to distinguish and prevent mistakes. The main function of antifreeze is to prevent the coolant from freezing and cracking the radiator and freezing the engine block or cover when the cold winter is parked, and when the temperature is high in summer, it can effectively prevent boiling and avoid the phenomenon of boiling the pot.

Automobile antifreeze has a large effect, which directly affects the performance and service life of the car. Antifreeze is a substitute for water. Because it is cold in winter, the water freezes at 0 degrees Celsius.

Whereas, antifreeze has a low freezing point and does not freeze.

Hello! In general, yes.

National standard) ethylene glycol Polyester ethylene glycol contains ethylene glycol (non-standard) ethylene glycol content of more than 98% (white) ethylene glycol content is greater than 98%, boiling point between 194-204 degrees (non-white) ethylene glycol content is greater than 93%, boiling point between 194-204 degrees (black) ethylene glycol content is greater than 85%, and other components are propylene glycol, with a total content of 98%.

Ethylene glycol and propylene glycol are the two main benchmark materials in the antifreeze market. All of them can be mixed with water to form a solution to reduce the freezing point of the aqueous solution, and have the ability to prevent freezing cracking. Generally, the minimum frost resistance of ethylene glycol and propylene glycol is -75.

Coolants, on the other hand, are limited by viscosity and generally have a minimum usable temperature of -30 in industrial applications. In the case of low level, the viscosity is too large, and the heat transfer will be poor. Glycol coolant, there are different types such as industrial type, automotive antifreeze type, etc.

The general industrial type only carries anti-corrosion treatment for carbon steel, stainless steel, copper, etc. The automobile antifreeze type also increases the anti-corrosion of cast aluminum, flux, etc. Propylene glycol antifreeze is generally used in the field of automotive antifreeze, as well as in food and beverages with special requirements.

Purely in terms of the ability of coolant to deliver cold and the ability to resist freezing, ethylene glycol is better than propylene glycol. However, considering the toxicity, propylene glycol is a low-toxicity or non-toxic product, while ethylene glycol has high toxicity and great harm to the human body. In terms of **, propylene glycol ** is higher than ethylene glycol.

Propylene glycol is further divided into pharmaceutical grade propylene glycol and industrial grade propylene glycol. Now there is a new progress, called "environmentally friendly propylene glycol", which is actually the best crops.

The antifreeze itself is a colorless and transparent liquid, and the reason why these antifreeze are made into bright colors is mainly to make it easier to distinguish and distinguish some dyes, and another function is to prevent accidental ingestion. The color of antifreeze is not necessarily related to performance and quality. The Great Wall multi-effect antifreeze is prepared in a special fluorescent green color, mainly to facilitate leak detection.

First 50% ethylene glycol.

50% water refers to 50% volume of ethylene glycol + 50% volume of water, the density can be calculated equivalently, the formula is as follows:

pequ = (pwater*vwater+peg*veg) (volume after compatibility).

In the above formula, P is used to represent density, and the subscript eg is used to represent ethylene glycol.

The density of the 50% aqueous glycol solution (volume concentration) at room temperature is the data **shrae manual 2005

Specific heat. The calculation is similar to the above.

In addition, you will be given the following knowledge to further help you understand the properties of water and ethylene glycol.

The concentration ratio is: 55% ethylene glycol + 45% water when its boiling point: 107; Freezing Point: -40

Depending on the temperature at which the precaution is required, it can be mixed with 1 3 times the amount of water, usually when the water is mixed in a ratio of 1:1, the coolant will be made.

The freezing point drops to ethylene glycol — aqueous type of antifreeze.

The maximum concentration used is 75%, so remember not to exceed this concentration.

Water molecules. It is a molecular cluster through the association of hydrogen bonds, with a high freezing point, if water is used as the coolant in winter, it will freeze and cannot flow if it is lower than 0, and it will not play the role of circulating cooling when it starts, and because water becomes ice crystals is a process of volume increase, usually the same mass of water will increase by 9% 10% when it becomes iceThe resulting swelling force will expand and crack the radiator and pipeline and other components, in the antifreeze containing ethylene glycol, due to the existence of ethylene glycol, the initial freezing point is much lower than water, when the freezing point is reached, the ice crystals precipitated into a slurry, and the content of ethylene glycol in these ice crystals is low, obviously most of the ethylene glycol is still left in the unsolidified liquid phase, the result is to make the freezing point of the solution that has not yet crystallized lower, it is because of this characteristic of ethylene glycol, Therefore, the actual temperature of antifreeze containing ethylene glycol can be lowered a little lower than the measured freezing point.

Of course, the freezing point will rise after the lowest point (-69, the concentration of ethylene glycol is 68%), so it is futile to think that increasing the concentration of ethylene glycol to achieve a lower freezing point is ineffective in the end.

The properties of ethylene glycol can be found in Encyclopedia:

The ratio of ethylene glycol to water is 1:3.

Normally, the ratio of ethylene glycol to water is 1:3, that is, 1 part ethylene glycol plus 3 parts water, but the dilution ratio of ethylene glycol to water can be adjusted according to the temperature of the water body. When the water temperature is lower than -10, the glycol ratio should be increased to 1:

In order to obtain a better antifreeze effect, when the water temperature is lower than -20, the ethylene glycol ratio should be increased to 1:2, when the water temperature is lower than -30, the ethylene glycol ratio should be increased to 1:, and when the water temperature is lower than -50, the ethylene glycol ratio should be increased to 1:

1。Benefits of Ethylene Glycol for Freeze Protection:

1. Cheap and high security.

2. Strong anti-freezing ability and low corrosiveness.

Uses of Ethylene Glycol:

It is mainly used in polyester products, antifreeze, and can also be used to lubricate skin agents, plasticizers, surfactants, coatings, explosives, inks, etc. Among them, polyester products (including polyester fibers, polyester thin stool films, polyester plastics and others) account for about 90% of ethylene glycol consumption. About 85% of polyester is used in the production of polyester, which in turn is mainly used in textiles and clothing.

Another important consumer area of ethylene glycol is antifreeze, and the demand for antifreeze is closely related to automobile consumption. <>