What is Carbon Monoxide?

Carbon monoxide, a carbon oxide compound, has the chemical formula CO and the chemical formula amount is 28.0101. It is a colorless, odorless, non-irritating gas under standard conditions. In terms of physical and chemical properties, the melting point of carbon monoxide is -205.1 ° C and the boiling point is -191.5 ° C. It is slightly soluble in water and is not easy to liquefy and solidify. It burns blue in the air and decomposes to generate carbon dioxide and carbon at higher temperatures. Blood can easily combine with hemoglobin to form carboxyhemoglobin, which causes hemoglobin to lose its ability and function to carry oxygen, causing tissue suffocation and death in severe cases. Industrially, carbon monoxide is the basis of one-carbon chemistry and is mainly used for the production of methanol and phosgene and organic synthesis.

Carbon monoxide gas was used to execute in ancient times

Carbon monoxide molecule is

Method

Carbon monoxide is produced in many industrial processes, such as synthetic ammonia feed gas, yellow phosphorus production tail gas, and blast furnace gas and converter gas in the steel industry. In terms of carbon monoxide resources, the amount of gas in steel mills is huge. Where carbon monoxide has high requirements and the demand is not particularly large, a carbon monoxide production device is often established or a by-product gas with a lower processing cost is used. Commonly used methods include coke oxygen method, carbon dioxide and charcoal reduction method. The charcoal layer in which carbon dioxide is passed into the electric furnace is reduced to carbon monoxide, and the ammonia-copper scrubbing regeneration gas method is used. ^[1]

Carbon monoxide is the main component of syngas and various types of gas.

When transporting carbon monoxide by steel cylinders, you must wear a safety helmet on the cylinders; the cylinders should be flat, and the door should be facing the same direction, and they should not cross; the height of the cylinders should not exceed the vehicle's protective railing, and it should be locked with a triangular wooden pad Prevent rolling; during transportation, the transportation vehicle should be equipped with the corresponding variety and quantity of fire fighting equipment; the exhaust pipe of the vehicle carrying the item must be equipped with a fire arrester, the use of mechanical equipment and tools that are prone to sparks is prohibited; loading and unloading with oxidants, alkalis , Edible chemicals and other mixed transport; summer and night should be transported to prevent sunlight exposure; stopovers, stay away from fire, heat sources. When transporting by road, you must follow the prescribed route. It is forbidden to stay in residential areas and densely populated areas. When transporting by rail, it is forbidden to slip. ^[4]

1. Occupational Exposure Limits in the Classification of Occupational Exposure to Hazard Levels (GBZ 230-2010)

Maximum allowable concentration (MAC): None;

Time weighted average allowable concentration (TWA): 20mg / m³;

Short-term exposure allowable concentration (STEL): 30mg / m³.

2. Maximum Allowable Concentration of Hazardous Substances in the Atmosphere of Residential Areas in "Design Sanitary Standards for Industrial Enterprises" (TJ 36-1979)

Primary value: 3.00mg / m³;

Daily average value: 1.00mg / m³.

3. Ambient air quality standards in Ambient Air Quality Standards (GB 3095-1996, obsolete on January 01, 2016)

Value time	Concentration limit
	First level	Secondary	Level III *
Daily average (mg / m³)	4.00	4.00	4.00
1 hour average (mg / m³)	10.00	10.00	20.00

(Form reference: ^[19]

Regarding whether CO can dissolve KMnO ₄ solution, some people think that KMnO ₄ solution can oxidize CO, that is, CO can discolor KMnO ₄ solution. Scholars Xu Meiling and Ren Yinzhe experimentally proved that CO cannot make KMnO ₄ solution Or its acid solution fades. ^[20]