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[Chemical Knowledge]：Manufacturing method and process of butyl octanol

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The manufacturing method
of butyl octanol
1. Introduction

Butyl octanol is an important chemical production raw material, widely used in coatings, plastics, inks, fibers, pharmaceuticals and pesticides and other fields. With the increasing demand for butyl octanol, it is of great significance to study its manufacturing methods for improving production efficiency, reducing costs and improving product quality. This paper will introduce the manufacturing method of butyl octanol in detail, including raw material selection, reaction principle, process flow, equipment selection and so on.

2. raw material selection

butyl octanol manufacturing raw materials are mainly butene, propylene, synthesis gas and so on. Among them, butene is the main carbon source, propylene is used as a comonomer, and synthesis gas provides hydrogen and carbon oxides. In order to ensure the smooth progress of production, it is necessary to select raw materials with higher purity and lower water content.

3. reaction principle

butyl octanol production mainly uses the aldol condensation method, that is, butyl aldehyde and synthesis gas in the hydrogen addition reaction, the generation of n-butanol. The specific reaction equation is as follows:

CH3CH2CH2CHO H2 → CH3CH2CH2CH2OH

The reaction is exothermic and needs to be carried out at an appropriate temperature and pressure to ensure the smooth progress of the reaction and the quality of the product.

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

1. Butene oxidation to butyraldehyde: butene is mixed with air, preheated and enters the reactor, and is oxidized under the action of silver catalyst to generate butyraldehyde and water.
2. Dehydrogenation of butyraldehyde to n-butyraldehyde: Butyraldehyde is mixed with water vapor, preheated and then enters the reactor. Dehydrogenation reaction is carried out under the action of copper catalyst to generate n-butyraldehyde and water.
3. Condensation of n-butyraldehyde to produce butyl octanol: the n-butyraldehyde is mixed with hydrogen in the synthesis gas, and enters the reactor after preheating, and the addition reaction is carried out under the action of nickel catalyst to produce butyl octanol.
4. Product separation and purification: The reaction product was separated and refined to obtain a higher purity butyl octanol product.

5. equipment selection

In the manufacturing process of butyl octanol, it is necessary to select appropriate equipment to ensure the smooth progress of production and product quality. The main equipment includes reactors, heat exchangers, separators, etc. Among them, the reactor needs to have an appropriate stirring device and temperature control system to ensure the uniformity and stability of the reaction; the heat exchanger needs to have efficient heat transfer performance and corrosion resistance to ensure the long life of the equipment and the stability of operation; The separator needs to have efficient separation performance and easy cleaning characteristics to ensure the purity of the product and the convenience of maintenance of the equipment.
Precautions for operation of
6.

In the manufacturing process of butyl octanol, the following operation items need to be paid attention to to ensure the safety of production and product quality:

1. Strictly control the quality and proportion of raw materials to avoid impurities and moisture The impact of the reaction.
2. Regularly check the operating conditions of the equipment and the activity of the catalyst, and make timely adjustments and replacements.
3. Strengthen the temperature and pressure control in the production process to avoid the influence of too high or too low temperature and pressure on the reaction.
4. Do a good job in the separation and refining of products to ensure the purity and quality of products.

7. Conclusion The manufacturing method of

butyl octanol involves multiple reaction steps and technological processes, and it is necessary to select appropriate raw materials, reactors and equipment, and strictly control operating conditions and product quality. By mastering manufacturing methods and precautions, we can improve production efficiency, reduce costs, improve product quality, and contribute to the development of chemical production.

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