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[Chemical Knowledge]：Properties and Uses of Diethylene Glycol Monoethyl Ether

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Diethylene glycol monoethyl ether (Diethylene Glycol Monoethyl Ether, referred to as DGME) is a common chemical production raw material, with a wide range of properties and uses. In this paper, the properties, production methods, quality standards, safety and use of diethylene glycol monoethyl ether will be introduced in detail.

1. the properties of diethylene glycol monoethyl ether

diethylene glycol monoethyl ether is a colorless and transparent liquid with elegant ether smell. Its molecular formula is C6H14O3 and its molecular weight is 134.17. Diethylene glycol monoethyl ether has good solubility, miscibility and permeability, and can be miscible with water, alcohols, ketones, esters and other organic solvents. In addition, it also has a lower vapor pressure and a higher boiling point, so it is often used as a solvent, reaction medium and chemical raw materials.

2. diethylene glycol monoethyl ether production method

diethylene glycol monoethyl ether production method mainly has two kinds of ester exchange method and ethylene oxidation method. The transesterification method uses ethylene glycol monoethyl ether as a raw material and ethylene glycol in the presence of an acidic catalyst to undergo a transesterification reaction to produce diethylene glycol monoethyl ether. The law of ethylene oxidation is that ethylene reacts with oxygen to produce ethylene oxide, and then reacts with ethylene glycol to obtain diethylene glycol monoethyl ether.

3. diethylene glycol monoethyl ether quality standards

diethylene glycol monoethyl ether quality standards mainly include purity, moisture, acidity, chroma and other indicators. Among them, the purity is the main index to measure the quality of diethylene glycol monoethyl ether, and the purity is generally above 99%. Indicators such as moisture, acidity and color also affect the performance and storage stability of diethylene glycol monoethyl ether.

4. safety
of diethylene glycol monoethyl ether
diethylene glycol monoethyl ether has certain toxicity and irritation. Long-term exposure or inhalation may cause headache, dizziness, nausea and other symptoms. Therefore, in the process of production and use, it is necessary to strictly abide by the safety operation procedures, wear protective equipment, and avoid direct contact and inhalation.

5. the use of diethylene glycol monoethyl ether

as an important chemical raw material, widely used in coatings, inks, cleaning agents, dyes, pharmaceuticals and other fields. The specific uses are as follows:

1. Coating industry: diethylene glycol monoethyl ether can be used as a solvent for the preparation of coatings to improve the leveling and drying properties of coatings.
2. Ink industry: In the ink production, diethylene glycol monoethyl ether can be used as a diluent to adjust the viscosity and drying of the ink.
3. cleaning agent industry: diethylene glycol monoethyl ether has good solubility and cleaning ability, can be used for the preparation of metal cleaning agent, glass cleaning agent.
4. Dye industry: diethylene glycol monoethyl ether can be used as a solvent and diluent for the production and preparation of dyes.
5. Pharmaceutical industry: diethylene glycol monoethyl ether in the field of medicine can be used as raw materials or solvents for the production of certain drugs.

In conclusion, diethylene glycol monoethyl ether, as a common raw material for chemical production, has a wide range of properties and uses. In the process of production and use, it is necessary to fully understand its nature and safety, and strictly abide by the operating procedures to ensure production safety and product quality.

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