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[Chemical Knowledge]：Production and manufacturing method and process flow of monochloromethane

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The manufacturing method
of monochloromethane
monochloromethane is an important chemical raw material, which is widely used in medicine, pesticide, organic synthesis and other fields. This article will introduce the manufacturing method of methyl chloride, including its raw materials, process flow, reaction principle, equipment, operation steps, quality control, safety and environmental protection, etc.

1. raw material

manufacture of methyl chloride is the main raw material of methane and chlorine. Among them, methane can be obtained from natural gas, coalbed methane, biogas and other sources, while chlorine gas is usually produced by electrolysis of salt water.

2. Process
The manufacturing process of
monochloromethane mainly includes the following steps:

1. Raw material preparation: methane and chlorine are respectively transported to the reactor through pipelines.

2. Reaction: In the reactor, methane and chlorine react under the action of the catalyst to generate monochloromethane.

3. Cooling: After the reaction is completed, the high-temperature gas in the reactor is cooled to normal temperature.

4. Separation: Methyl chloride is separated from the reaction mixture by means of a fractionator.

5. Purification: Purify the separated monochloromethane to remove impurities therein.

6. Finished Product Storage: Store purified methyl chloride in cylinders for sale or use.

3. reaction principle

methane and chlorine under the action of catalyst, the substitution reaction occurs to generate monochloromethane. The specific reaction equation is: CH4Cl2 → CH3Cl HCl. In this reaction, the hydrogen atoms in the methane molecule are replaced by chlorine atoms, resulting in monochloromethane and hydrogen chloride.

4. equipment

The equipment required for the manufacture of monochloromethane mainly includes reactors, fractionation towers, coolers, storage tanks, etc. Among them, the reactor is the core equipment, which needs to have high temperature resistance, corrosion resistance and other properties to ensure the smooth progress of the reaction.

5. operation steps

1. Check whether the equipment is operating normally to ensure that the temperature and pressure of the reactor are controlled within a safe range.

2. Methane and chlorine gas are introduced into the reactor according to a certain proportion, and the catalyst is started to start the reaction.

3. The reactor temperature and pressure were monitored and adjusted as necessary to maintain a stable reaction.

4. After the reaction is completed, the supply of the catalyst and the raw material gas is closed, and the high-temperature gas in the reactor is cooled to normal temperature.

5. Open the fractionation tower and other equipment to separate the chloromethane from the reaction mixture for purification and storage.

6. quality control

In order to ensure the product quality of monochloromethane, strict quality control is required. It mainly includes the monitoring and adjustment of the purity of the raw gas, the temperature and pressure of the reactor, and the purity of the product. At the same time, it is also necessary to regularly maintain and overhaul the production equipment to ensure the normal operation of the equipment.

7. safety and environmental protection

in the process of manufacturing monochloromethane, need to pay attention to safety and environmental protection issues. First of all, it is necessary to ensure that the production equipment is well sealed to prevent gas leakage and environmental pollution. Second, it is necessary to properly treat waste gas and waste water to avoid harm to the environment and human body. Finally, it is necessary to strengthen the safety training and education of employees, and improve the safety awareness and operation skills of employees.

In short, the manufacturing method of monochloromethane needs to consider factors such as raw materials, process flow, reaction principle, equipment, operation steps, quality control, safety and environmental protection. Only on the basis of a comprehensive grasp of these factors, can produce high-quality chloromethane products.

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