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[Chemical Knowledge]：The production and manufacturing method and process of ethylene oxide.

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Manufacturing method

of ethylene oxide Ethylene oxide is an important organic compound, mainly used in the production of ethylene glycol, ethanolamine and other chemicals. This paper will introduce the manufacturing method of ethylene oxide, focusing on its production raw materials, process, reaction mechanism and optimization measures.

1. Production Feedstock

Ethylene oxide production primarily uses ethylene and oxygen as feedstocks. Among them, ethylene is a common hydrocarbon compound, which can be produced by petroleum cracking, ethanol dehydration and other methods; oxygen is usually from the air separation unit.

2. Process
There are two main processes for the production of
ethylene oxide: chlorohydrin and direct oxidation.

1. Chlorohydrin method

Chlorohydrin method is a traditional production method, the main steps are as follows:

(1) ethylene reacts with chlorine to generate dichloroethane;
(2) dichloroethane reacts with water to generate chloroethanol;
(3) chloroethanol dehydrochlorination under alkaline conditions to generate ethylene oxide.
the process of
chlorohydrin is mature and simple to operate, a large amount of waste water and waste gas will be produced in the production process, which will cause certain pollution to the environment.

2. direct oxidation method

direct oxidation method is a more advanced production method, the main steps are as follows:

(1) ethylene and oxygen in the silver catalyst, gas phase oxidation reaction of ethylene oxide;
(2) by cooling and separation, the ethylene oxide is separated from the reaction gas. The direct oxidation of

has the advantages of low energy consumption and low pollution, and has become the mainstream process of ethylene oxide production.

3. reaction mechanism

ethylene oxide production process, the reaction mechanism involved is more complex. Taking the direct oxidation method as an example, the main reaction is ethylene and oxygen to form ethylene oxide under the action of silver catalyst. At the same time, some side reactions may occur, such as the complete oxidation of ethylene to form carbon dioxide and water, and the reaction of ethylene with oxygen to form acetaldehyde.

4. optimization measures

In order to improve the production efficiency of ethylene oxide, reduce energy consumption and reduce environmental pollution, the following optimization measures can be taken:

1. Select high-performance silver catalyst to improve catalytic activity;
2. Optimize the structural design of the reactor to improve the efficiency of gas mixing and mass transfer;
3. Adopt advanced control system to accurately control the production process;
4. Strengthen the recovery and treatment of waste gas to reduce environmental pollution.

In short, the manufacturing method of ethylene oxide is continuously optimized to improve production efficiency, reduce energy consumption and reduce environmental pollution. In the future, with the continuous development of science and technology, the production process of ethylene oxide will be further improved and perfected.

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