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[Chemical Knowledge]：Production and manufacturing method and process flow of o-isobutyl phenol

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Ortho-isobutylphenol (O-Isobutylphenol, OBP for short) is a common chemical raw material and has a wide range of applications. Its manufacturing method mainly includes phenol alkylation method, cumene oxidation method and so on. This article will introduce these two manufacturing methods in detail, including the reaction principle, process flow, advantages and disadvantages, etc.

1. phenol alkylation method

phenol alkylation method is a method for preparing o-isobutyl phenol by alkylation reaction of phenol and isobutylene as raw materials. The reaction principle of the method is as follows:

phenol isobutylene → ortho-isobutyl phenol

process:

1. phenol and isobutylene are mixed in a certain proportion, a catalyst is added, and the temperature is raised to the reaction temperature.
2. Maintain a certain reaction time, so that phenol and isobutylene fully react to generate o-isobutyl phenol.
3. After the reaction, cooling, separation, purification and other operations are carried out to obtain o-isobutylphenol product with high purity.

advantages:

1. Raw materials are readily available and the cost is low.
2. The reaction condition is mild and the operation is simple.
3. The product has higher purity and higher yield.

disadvantages:

1. The catalyst needs to be replaced regularly, which increases production costs.
2. by-products may be produced during the reaction, which need to be separated and purified.

2. cumene oxidation method

cumene oxidation method is based on cumene as raw material, through the oxidation reaction to prepare o-isobutyl phenol method. The reaction principle of the method is as follows:

cumene oxygen → cumene hydroperoxide → o-isobutyl phenol acetone

process:

1. Mix cumene and oxygen in a certain proportion, add a catalyst, and heat up to the reaction temperature.
2. Cumene hydroperoxide is generated during the reaction, and then undergoes a decomposition reaction to generate o-isobutyl phenol and acetone.
3. After the reaction, cooling, separation, purification and other operations are carried out to obtain o-isobutylphenol product with high purity.

advantages:

1. Raw materials are readily available and the cost is low.
2. The acetone produced in the reaction process can be recycled as a by-product, which improves the economic efficiency.

disadvantages:

1. The reaction process needs to use a catalyst, which increases the production cost.
2. by-products may be produced during the reaction, which need to be separated and purified.

In summary, phenol alkylation and cumene oxidation are both common methods for the preparation of o-isobutyl phenol, each with its own advantages and disadvantages. In the actual production process, the appropriate manufacturing method can be selected according to the specific situation. At the same time, in order to improve product quality and yield, it is necessary to optimize the process parameters such as reaction conditions, catalyst selection, separation and purification.

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