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

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of the manufacturing method
of o-butyl phenol o-butyl phenol (O-Butylphenol) is an important chemical raw material, widely used in plastics, rubber, ink, paint and other fields. This article will introduce the manufacturing method of o-butyl phenol, including raw material preparation, reaction process, post-treatment and so on.

1. raw material preparation

1. Phenol: Phenol is the main raw material of o-butyl phenol, and industrial grade phenol with higher purity should be selected.
2. Butene: Butene is the raw material for alkylation reaction with phenol, and industrial grade butene is generally used.
3. catalyst: alkylation reaction requires the participation of catalyst, commonly used catalyst is sulfuric acid, hydrofluoric acid, etc.

2. reaction process

The manufacturing process of o-butylphenol mainly uses alkylation reaction, that is, phenol and butene are reacted under the action of a catalyst. The specific steps are as follows:

1. add phenol and catalyst into a reaction kettle and stir evenly.
2. At a certain temperature, butene gas is introduced to make phenol and butene fully contact.
3. Control the reaction temperature and time, so that phenol and butene alkylation reaction to produce o-butyl phenol.

3. post-treatment
After the
reaction is completed, the product needs to be post-treated to obtain o-butylphenol with higher purity. The specific steps are as follows:

1. the feeding of butene gas is stopped, and the reaction liquid is cooled to room temperature.
2. An alkaline absorbent is added to the reaction solution to react with the remaining catalyst to neutralize the acidic substance.
3. The reaction solution is distilled to separate o-butylphenol and other impurities.
4. o-butyl phenol is refined, such as recrystallization, distillation and other operations to improve product purity.

4. precautions

1. During the operation, the reaction temperature and time should be strictly controlled to avoid excessive alkylation to generate by-products.
2. The selection and use of catalysts should pay attention to safety and environmental protection to avoid environmental pollution.
3. In the post-processing process, the product quality and purity should be guaranteed to meet the application needs of different fields.

In short, the manufacturing method of o-butyl phenol involves multiple links such as raw material preparation, reaction process, and post-treatment. It is necessary to strictly control operating conditions and product quality to ensure product purity and yield. At the same time, safety and environmental protection issues should be paid attention to in the production process to promote the sustainable development of chemical production.

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