Usage:

1. Mainly used to make polyester, polyester, polyester resin, hygroscopic agent, plasticizer, surfactant, synthetic fiber, cosmetics.

2. It can be used as a wetting agent for cellophane, fiber, leather, and adhesives.

3. It can produce synthetic resin PET, fiber grade PET is polyester fiber, bottle flake grade PET is used to make mineral water bottles, etc.

4. It can produce alkyd resin, glyoxal, etc., and is also used as antifreeze.

Pay attention to when using ethylene glycol as a refrigerant, you should :

1. Its freezing point changes with the concentration of ethylene glycol in the aqueous solution. When the concentration is below 60%, the freezing point decreases as the concentration of ethylene glycol in the aqueous solution increases. However, after the concentration exceeds 60%, as the concentration of ethylene glycol increases, the freezing point changes. As the concentration increases, its freezing point tends to rise, and the viscosity also increases as the concentration increases. When the concentration reaches 99.9%, its freezing point rises to -13.2°C.

2. Ethylene glycol contains hydroxyl groups. When working at 80 degrees Celsius - 90 degrees Celsius for a long time, ethylene glycol will be oxidized first to glycolic acid and then to oxalic acid, that is, oxalic acid (oxalic acid), which contains 2 carboxyl groups. Oxalic acid and its by-products affect the central nervous system first, then the heart, and then the kidneys. Ethylene glycol oxalic acid, which causes corrosion to equipment and makes it leak. Therefore, in the prepared antifreeze, there must also be a preservative to prevent corrosion of steel and aluminum and the formation of scale.