Triethylene Glycol Skincare CAS 112-27-6

The core advantage of being a solvent lies in its high selectivity and solubility, especially suitable for aromatic hydrocarbon extraction processes. In petroleum refining, aromatic hydrocarbons such as benzene, toluene, and xylene (BTX) in the reforming liquid are important chemical raw materials, but they need to be efficiently separated from the mixed hydrocarbons. This goal is achieved through liquid-liquid extraction: its polar groups form hydrogen bonds with aromatic hydrocarbons, while non aromatic hydrocarbons (such as alkanes) are excluded due to polarity differences. The typical parameters of this process are as follows:

Operating conditions: temperature of 40-60 ℃, pressure of 1.0-1.5 MPa, solvent ratio (TEG to raw material mass ratio) of 3:1-5:1.

Separation efficiency: The recovery rate of aromatic hydrocarbons can reach over 90%, the purity is close to 100%, and the solvent loss is less than 0.5 kg/ton of raw material.

Economy: Compared to traditional glycol solvents such as diethylene glycol, its cycle life is extended by 30% and equipment corrosion rate is reduced by 50%.
In addition, it can also dissolve polymer materials such as rubber, nitrocellulose, and resin. For example, in the processing of polyvinyl chloride (PVC), adding 5% -10% of this substance can significantly reduce melt viscosity and improve extrusion molding performance; In polyvinyl acetate (PVAc) lotion, as a cosolvent, it can improve the stability of lotion and prevent stratification.

Through esterification reaction, triethylene glycol diacetate (TEGDA) is generated, becoming an important plasticizer in the plastic industry. The molecular structure of TEGDA is similar in polarity to resin and has excellent compatibility. Its mechanism of action includes:

Lowering the glass transition temperature (Tg): TEGDA molecules are inserted between resin chains, weakening intermolecular forces and allowing the material to maintain flexibility at low temperatures.

Improving processing performance: Adding TEGDA to PVC can lower the melt temperature by 10-15 ℃, reduce energy consumption, and extend equipment life.
Improve physical properties: Increase the elongation at break of PVC film by 200% and the impact strength by 50%.
TEGDA is widely used in safety films, sealing materials, industrial coatings, and other fields. For example, after adding TEGDA to the windshield safety film of a car, it can withstand extreme temperature changes from -40 ℃ to 80 ℃ without cracking; In food packaging materials, TEGDA's low mobility (<0.1 mg/kg) meets FDA standards to ensure food safety.

Its alcohol ether structure endows it with the ability to reduce liquid surface tension, and its critical micelle concentration (CMC) is 0.1 mol/L, which can significantly improve wettability. Specific applications include:
Printing ink: acts as a moisture absorbent to prevent ink from drying and clumping, while also serving as a softener to enhance the feel of printed materials. For example, adding 3% to newspaper ink can increase printing speed by 20%.

Textile printing and dyeing: As a wetting agent, triethylene glycol skincare helps dyes penetrate fibers evenly and improves color fastness. In reactive dye dyeing, the dyeing time can be shortened by 30% and the number of water washes can be reduced.
Coating industry: As a leveling agent to eliminate pinholes on the surface of coatings, adding 0.5% -1% triethylene glycol to water-based coatings can increase glossiness by 15%.

Excessive water content in natural gas can lead to the formation of hydrates, blockage of pipelines, and corrosion of equipment. It is the most commonly used solvent for natural gas dehydration, with a dehydration efficiency far exceeding that of diethylene glycol and ethylene glycol. The typical process flow is as follows:
Absorption tower: Natural gas (with a water content of 0.5% -2%) enters from the bottom and comes into countercurrent contact with triethylene glycol sprayed from the top. The water is absorbed to form a rich liquid (with a water content of 5% -10%).

Regeneration tower: After heating the rich solution to 200 ℃, the water evaporates, and the lean solution (with water content<0.1%) is recycled.

Cooling and filtration: The regenerated triethylene glycol is cooled and filtered before returning to the absorption tower.
The technical advantages of this process include:
Accurate dew point control: It can reduce the water dew point of natural gas to below -60 ℃, meeting the strict requirements of long-distance pipelines for moisture (such as the West East Gas Pipeline Project requiring a water dew point of ≤ -10 ℃).
Low energy consumption: The regeneration process uses a fire tube to directly heat the reboiler, with a thermal efficiency of 85%, and the operating cost is reduced by 20% -30% compared to the molecular sieve adsorption method.
Strong stability: chemically stable, not easily decomposed, can be reused for a long time (usually>5 years), and has low equipment maintenance costs.

The freezing point is -7.2 ℃ and the boiling point is 285 ℃, making it an ideal antifreeze for automotive cooling systems and diesel additives. Its advantages include:
Low corrosiveness: The corrosion rate of metals such as aluminum alloy and copper is reduced by 60% compared to ethylene glycol, extending the life of the engine.
High boiling point: can withstand high temperature environment of the engine and prevent the phenomenon of "boiling".

Environmental friendliness: Biodegradation rate>90%, in compliance with EU REACH regulations.
Adding triethylene glycol to diesel can lower the cold filter point (CFPP) and prevent the precipitation of wax crystals in diesel at low temperatures. For example, adding 0.5% triethylene glycol to 0 # diesel can reduce CFPP from 4 ℃ to -10 ℃, ensuring that the engine starts normally in an environment of -20 ℃.

In addition to natural gas, it can also be used for drying industrial gases such as associated gas, carbon dioxide, and hydrogen in oil fields. For example:
Synthetic ammonia production: The water content in the feed gas should be less than 0.1 ppm, otherwise it will poison the iron-based catalyst. Dehydration can extend the lifespan of catalysts by 3-5 times.
Hydrogen purification: In proton exchange membrane fuel cells (PEMFCs), dehydration can lower the dew point of hydrogen to -70 ℃, meeting the strict requirements of the cell for moisture.