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

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The manufacturing method
of diisobutylene
1. Introduction

Diisobutylene is an important chemical raw material, widely used in fine chemicals, plastics, rubber, medicine and other fields. With the continuous development of science and technology, the manufacturing method of diisobutylene is also constantly improved and optimized. This paper will introduce the manufacturing method of diisobutylene, including raw material selection, reaction principle, process flow, equipment selection and so on.

2. Feedstock Selection

The main feedstock for the manufacture of diisobutylene is isobutylene. Isobutene is a colorless, flammable, and pungent gas that can be separated from petroleum cracking or natural gas. When selecting raw materials, the purity and content of isobutylene should be guaranteed to avoid adverse effects on subsequent reactions.

3. Reaction Principle

The manufacturing method of diisobutylene mainly adopts olefin metathesis reaction, that is, two isobutylene molecules are connected head-to-tail under certain conditions to generate diisobutylene. The reaction needs to be carried out under the action of a catalyst, and commonly used catalysts include acidic catalysts and metal catalysts. During the reaction, the reaction temperature and pressure need to be controlled to ensure the smooth progress of the reaction.

4. Process
The manufacturing process of
diisobutylene mainly includes the following steps:

1. Raw material pretreatment: isobutylene is purified, dried and other treatments to ensure that its purity and water content meet the reaction requirements.

2. Reaction: The pretreated isobutylene is introduced into the reactor, and the olefin metathesis reaction is carried out under the action of the catalyst to generate diisobutylene.

3. Product separation and purification: After the reaction, the reaction product is separated and purified to obtain a diisobutylene product with high purity.

4. catalyst regeneration: the used catalyst is regenerated to restore its activity and realize the recycling of the catalyst.

5. equipment selection

In the manufacturing process of diisobutylene, it is necessary to select appropriate equipment to ensure the smooth progress of production. The following are the main equipment selection:

1. Reactor: Reactors with good mass and heat transfer performance should be selected to ensure the uniformity and efficiency of the reaction. Common reactor types include stirred tank reactors and fixed bed reactors.

2. Separation equipment: According to the requirements of product separation and purification, select suitable separation equipment, such as distillation tower, absorption tower, etc.

3. Storage equipment: Select appropriate storage equipment, such as storage tanks, steel cylinders, etc., to ensure the storage safety and ease of use of the product.

6. safety production and environmental protection requirements

In the manufacturing process of diisobutylene, it is necessary to pay attention to safety production and environmental protection requirements. Effective measures should be taken to reduce safety risks in the production process, such as strengthening equipment maintenance and improving operating procedures. At the same time, the treatment and emission control of production waste gas should be strengthened to reduce the impact on the environment.

7. conclusion

diisobutylene as an important chemical raw material, its manufacturing method has been continuously improved and optimized. In the selection of raw materials, reaction principle, process flow and equipment selection, we should pay attention to the improvement of production efficiency and product quality, and strengthen the management of safety production and environmental protection, so as to realize the sustainable development of production.

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