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[Chemical Knowledge]：Properties and Uses of Oxygen

Read： 544 Time：11months ago Source：Transform the World with Simplicity

Oxygen is a non-metallic element with the chemical symbol O and atomic number 8. Under normal temperature and pressure, oxygen is a colorless, tasteless, odorless gas with high reactivity and can react with many elements and compounds. In the field of chemical production raw materials, oxygen is widely used in oxidation reaction, combustion reaction, fermentation process and so on.

1. the nature of oxygen

1. physical properties

oxygen at room temperature and pressure is colorless, tasteless, odorless gas, density slightly larger than air, not soluble in water, but slightly soluble in ethanol, ether and other organic solvents. Oxygen has a melting point of minus 218.4 ℃, a boiling point of minus 182.9 ℃, a critical temperature of minus 118.4 ℃, and a critical pressure of 5.08MPa.

2. Chemical properties

Oxygen is a strong oxidant that can react with many elements and compounds, such as metals, non-metals, and organics. The reactivity of oxygen is more intense at high temperature, high pressure or in the presence of a catalyst. In addition, the oxygen is also combustion-supporting and can support the combustion reaction.

2. the use of oxygen

in the field of chemical production raw materials, oxygen has a wide range of uses, mainly used in the following aspects:

1. oxidation reaction

oxygen as a strong oxidant, is widely used in organic and inorganic oxidation reaction. For example, in reactions such as the oxidation of ethylene to acetaldehyde, the oxidation of propylene to acrylic acid, and the oxidation of methanol to formaldehyde, oxygen as an oxidant can increase the rate and selectivity of the reaction.

2. Combustion reaction

oxygen as a combustion aid, which can support the combustion reaction and is widely used in high temperature processing such as flame cutting, welding and smelting.

3. fermentation process

in the fermentation process, oxygen as a microbial respiratory material, can promote the growth and metabolism of microorganisms, improve the yield and quality of fermentation products.

In short, oxygen has a wide range of uses in the field of chemical production raw materials, which can improve the quality and output of chemical products and promote the development of the chemical industry.

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