What does co mean?

1. commander (commanding officer)

Carbon monoxide is a carbon-oxygen compound with the chemical formula of CO and the molecular weight of 28.0 10 1. Usually, it is a colorless, odorless and tasteless gas. Physically speaking, carbon monoxide has a melting point of -205℃ and a boiling point of-19 1.5℃, and is insoluble in water (the solubility in water at 20℃ is 0.002838g), so it is not easy to liquefy and solidify.

Chemically, carbon monoxide is both reducing and oxidizing, and oxidation reaction (combustion reaction) and disproportionation reaction can occur. At the same time, it is poisonous. At high concentration, it will cause people to have different degrees of poisoning symptoms, harm human brain, heart, liver, kidney, lung and other tissues, and even die like an electric shock. The minimum lethal concentration for human inhalation is 5000 ppm(5 minutes).

In industry, carbon monoxide is the basis of carbon monoxide chemistry, which can be prepared by coke oxygen method and other methods, and is mainly used for the production of methanol and phosgene and organic synthesis.

2. Chemical properties

Carbon monoxide is an unsaturated metastable molecule, and its chemical properties are stable during decomposition. At room temperature, carbon monoxide will not react with acids, bases, etc. However, when mixed with air, it can form an explosive mixture, which can cause combustion and explosion when exposed to open flame and high temperature. It is a flammable and explosive gas.

Because the valence of carbon element in carbon monoxide molecule is +2, it can be oxidized to +4, which is reducibility; And can be reduced to the oxidized low valence state.

3. Application area

In the chemical industry, carbon monoxide is the basis of one-carbon chemistry. As the main component of synthetic gas and various gas, carbon monoxide is an important raw material for synthesizing a series of basic organic chemical products and intermediates. Starting from carbon monoxide, almost all basic chemicals can be prepared, such as ammonia, phosgene, alcohol, acid, anhydride, ester, aldehyde, ether, amine, alkane and olefin.

At the same time, various homogeneous reaction catalysts for organic chemical production can be prepared by using the property that carbon monoxide reacts with transition metals to form carbonyl complex metals or carbonyl complex metal derivatives. In addition, carbon monoxide can be used as a terminator for polyethylene polymerization.