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[Chemical Knowledge]：Manufacturing method and process of dimethyl ether

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Manufacturing Method
of Dimethyl Ether
(Dimethyl, DME) is an important raw material for chemical production and has a wide range of applications. This paper will introduce the manufacturing method of dimethyl ether, including raw material selection, reaction principle, process flow, equipment selection and so on.

1. raw material selection

dimethyl ether production is mainly methanol as raw material, through dehydration reaction. Therefore, the selection of high purity methanol as raw material is the key to ensure the quality of dimethyl ether.

2. reaction principle

dimethyl ether production reaction is the dehydration reaction of methanol, the reaction equation is: 2CH3OH → CH3OCH3 H2O. This reaction is a reversible reaction, and it is necessary to increase the reaction rate and lower the reaction temperature by the action of a catalyst.

3. Process
The production process of
dimethyl ether mainly includes the following steps:

1. Methanol feed: high-purity methanol is fed into the reactor through a metering pump.

2. Catalyst Addition: Catalyst is added to the reactor to increase the reaction rate.

3. Reaction: In the reactor, methanol is dehydrated under the action of a catalyst to generate dimethyl ether and water.

4. Separation: Dimethyl ether and water were separated by cooling and separation.

5. Refining: Refining the separated dimethyl ether to remove impurities therein.

6. Discharge: The refined dimethyl ether was discharged to a storage tank.

4. equipment selection

the production of dimethyl ether need to choose the appropriate equipment to ensure production efficiency and product quality. The main equipment includes:

1. reactor: select efficient, durable reactor, ensure the reaction efficiency and product quality.

2. Separator: Select efficient separator to achieve effective separation of dimethyl ether and water.

3. Refining tower: Select high-precision refining tower to remove impurities in dimethyl ether.

4. storage tank: choose corrosion resistance, good sealing storage tank, ensure the safety of dimethyl ether storage.

5. production precautions

1. Strictly control the quality of raw material methanol to avoid the impact of impurities on production.

2. The selection and use of the catalyst should be reasonable to ensure the reaction efficiency and the life of the catalyst.

3. Parameters such as temperature and pressure should be strictly controlled during the production process to ensure production safety and product quality.

4. Regular maintenance and maintenance of production equipment to ensure the normal operation and service life of the equipment.

In short, the manufacturing method of dimethyl ether needs to pay attention to the selection of raw materials, reaction principle, process flow, equipment selection and other aspects to ensure production efficiency and product quality. At the same time, the production process needs to strictly abide by the safety operation procedures to ensure the smooth progress of production safety.

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