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The difference between ethylene glycol and ethanolamine
1. structure and properties of the main differences
1. Ethylene glycol structure and properties
Ethylene glycol (Ethylene glycol) is a glycol with the molecular structure CH₂ OH-CH OH, which has two hydroxyl groups (-OH) and an ether bond (-O-). Its chemical properties are stable, liquid at room temperature, with high solubility, soluble in water and organic solvents. Ethylene glycol is a weakly acidic substance, and its pH value is close to neutral under neutral conditions.
2. Ethanolamine structure and properties
Ethanolamine (Ethylamine) is an organic amine compound with a molecular structure of CH₂ NH₂-CH, which has an amino group (-NH) and an ethyl group (-CH). Ethanolamine is a strong alkaline substance, which can be dissociated in water to form NH and acetate ions. Its chemical properties are relatively lively, easy to react with acidic substances.
2. main application areas of distinction
1. Industrial production on the application
In industrial production, ethylene glycol is mainly used to produce biofuels, dye intermediates and solvents. For example, ethylene glycol is an important raw material for the production of biodiesel and has clean use characteristics. Ethylene glycol is also used in the manufacture of plastic additives, fillers, etc.
Ethanolamine is mainly used in the textile industry and rubber industry. In the textile industry, ethanolamine is often used as dyeing auxiliaries and softeners to improve the dyeing effect and softness of fabrics. In the rubber industry, ethanolamine is used as a cross-linking agent to help improve the properties of the rubber.
2. Liquid refrigeration system application
Ethylene glycol has important application value in liquid refrigeration system. It is a common refrigerant used in household air conditioning and industrial refrigeration systems. Ethylene glycol has a wide range of applications in the field of liquid refrigeration due to its low toxicity and high boiling point.
Ethanolamine is mainly used in dyes, bleaching agents and textile auxiliaries and other fields. In the production of dyes, ethanolamine is used as a dye stabilizer and decolorizing agent, which can effectively prevent the degradation of dyes and the broaden of chromatographic peaks.
3. Physical Properties Comparison
1. Boiling Point and Density
Ethylene glycol is a liquid at room temperature, with a low boiling point (about 101°C) and a density of about 0.96g/cm³. In contrast, ethanolamine is also a liquid at room temperature, but has a higher boiling point (about 170°C) and a density of about 0.72g/cm³. The lower boiling point of ethylene glycol makes it convenient in certain applications.
2. Viscosity
The viscosity of ethylene glycol is about 0.3 mPa · s at normal temperature, which has a relatively low viscosity and is suitable for industrial applications that require fast flow. The viscosity of ethanolamine is relatively high, about 1.5 mPa · s, which makes it have certain resistance characteristics in some industrial applications.
4. summary
Ethylene glycol and ethanolamine have important applications in the field of chemical engineering, but there are significant differences in their structure, properties and applications. As a common diol, ethylene glycol has low acidity, high solubility and low boiling point, and is widely used in biofuels, solvents and other fields. As an organic amine compound, ethanolamine has strong alkalinity and is commonly used in textile and rubber industries. Understanding the difference between these two substances is of great significance for selecting suitable raw materials and optimizing the production process. Through in-depth study of their differences, chemical workers can make better use of these two substances to promote the development of industrial production and scientific and technological innovation.
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