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

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Hexylene Glycol (HG) is an important chemical raw material, which is widely used in polyurethane, coatings, plastics, fibers and other fields. This paper will introduce the manufacturing method of isohexanediol in detail, including the selection of raw materials, reaction principle, process flow, equipment selection and so on.

1. Raw Material Selection

The main raw materials for the manufacture of isohexanediol are cyclohexane and hydrogen peroxide. Cyclohexane is a common organic compound with stable chemical properties and low toxicity, so it is widely used as a chemical raw material. Hydrogen peroxide is a strong oxidant, which can oxidize cyclohexane to produce cyclohexanol and cyclohexanone, and then obtain isohexanediol through hydrogenation reaction.

2. reaction principle

isohexanediol production reaction mainly includes two steps of oxidation reaction and hydrogenation reaction. The specific reaction principle is as follows:

1. oxidation reaction: cyclohexane is oxidized to form a mixture of cyclohexanol and cyclohexanone under the action of hydrogen peroxide.
2. Hydrogenation reaction: the mixture of cyclohexanol and cyclohexanone is subjected to hydrogenation reaction under the action of a catalyst to generate isohexanediol.

3. Process
The manufacturing process of
isohexanediol mainly includes the following steps:

1. Ingredients: cyclohexane and hydrogen peroxide are added into the reactor according to a certain proportion.
2. Oxidation reaction: Cyclohexane and hydrogen peroxide are oxidized to form a mixture of cyclohexanol and cyclohexanone at an appropriate temperature and pressure.
3. Separation: The oxidation reaction product is separated to obtain a mixture of cyclohexanol and cyclohexanone.
4. Hydrogenation reaction: The mixture of cyclohexanol and cyclohexanone is fed into a hydrogenation reactor, and the hydrogenation reaction is carried out under the action of a catalyst to produce isohexanediol.
5. Refining: Refining the hydrogenation reaction product to obtain isohexanediol product with higher purity.

4. Equipment Selection

In the manufacturing process of isohexanediol, the equipment that needs to be used mainly includes reactors, separators, hydrogenation reactors, refining equipment, etc. When selecting equipment, it is necessary to comprehensively consider factors such as production scale, product quality, and operational safety to select the appropriate equipment type and specification.
Precautions for production operation of
5.

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

1. Strictly control the quality and ratio of raw materials to ensure the smooth progress of the reaction.
2. Strengthen equipment maintenance and maintenance to ensure the normal operation and service life of the equipment.
3. Strictly implement the operation procedures and safety regulations to prevent accidents.
4. Comprehensive monitoring and testing of the production process to ensure that product quality meets standard requirements.

In short, the manufacturing method of isohexanediol involves multiple links and factors, which need to be fully considered and controlled in the production process to ensure product quality and production safety.

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