Triethylene glycol (TEG) with the chemical formula C6H14O4 is a colorless, odorless, water-soluble liquid that belongs to the glycol family and is derived from ethylene oxide.
It is known for its hygroscopicity, and is very effective at absorbing moisture. TEG has unique chemical properties that make it valuable for a variety of applications. Its high boiling point, low vapor pressure, and low volatility are important features that make it well-suited for heat transfer and dehydration processes. TEG is also miscible with water and many organic solvents, which increases its flexibility in a variety of applications.
In the oil and gas industry, triethylene glycol plays a vital role in natural gas dehydration. It is used in glycol dehydration units to remove water vapor from natural gas streams, which prevents corrosion of pipelines and the formation of hydrates. The hygroscopic nature of TEG makes this process very effective.
Technical Characteristics
| Chemical Formula | C6H14O4 |
| Other names | Triglycol 2,2′-[Ethane-1,2-diylbis(oxy)] di(ethan-1-ol) 2-[2-(2-Hydroxyethoxy) ethoxy] ethanol |
| CAS Number | 112-27-6 |
| Molar mass | 150.174 g/mol |
| Melting Point | −7 °C |
| Boiling Point: | 285 °C |
| Density | 1.1255 g/mL |
| Appearance | Colorless liquid |
Applications
- Dehydration of natural gas
- Cleaning products and household care
- Deodorizer
- Disinfectant
- Cosmetic Products
Environmental impact of TEG
Triethylene glycol can cause water and soil contamination if leaked or released into the environment. It dissolves readily in water and may negatively impact water quality and harm aquatic ecosystems. Although TEG is less toxic than many industrial chemicals, improper use and poor management can lead to harmful environmental impacts.
Safety Measures and Regulations for Handling TEG
When working with TEG, it is essential to wear personal protective equipment such as gloves, safety glasses, and appropriate clothing. It should be stored in a cool, dry place away from heat sources and direct sunlight. Adequate ventilation is recommended to prevent inhalation of vapors. If TEG is spilled or leaked, it should be cleaned up promptly and prevented from entering water systems. It is also essential to comply with local and international regulations regarding its handling, storage, and disposal.
Packing
This chemical can be supplied in 230 kg barrels.