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

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of the manufacturing method
of benzyl alcohol Benzyl alcohol is an important organic chemical raw material, which is widely used in medicine, spices, dyes, plastics and other fields. This article will introduce the manufacturing method of benzyl alcohol, including raw materials, process flow, reaction principle, equipment, operation steps, safety precautions, environmental protection and sustainable development.

1. raw materials and formula

The raw materials for the manufacture of benzyl alcohol are mainly benzene and formaldehyde, in which the mass fraction of benzene is about 70% ~ 75%, and the mass fraction of formaldehyde is about 25% ~ 30%. In order to improve the reaction rate and product purity, a catalyst and a polymerization inhibitor may be appropriately added.

2. Process
The manufacturing process of
benzyl alcohol mainly includes the following steps:

1. Benzene and formaldehyde are added to produce benzyl alcohol under the action of catalyst;
2. Unreacted benzene and formaldehyde are separated by distillation to obtain crude benzyl alcohol;
3. The crude benzyl alcohol is refined to obtain high purity benzyl alcohol products.

3. reaction principle

The manufacturing reaction principle of benzyl alcohol is an addition reaction of benzene and formaldehyde under the action of an acidic catalyst to generate benzyl alcohol. Commonly used catalysts include p-toluenesulfonic acid, sulfuric acid, and the like.

4. Equipment and Apparatus
The reaction equipment to be used for the production of
benzyl alcohol includes a stirred tank, a reactor, a distillation column and the like. Among them, the stirred tank is used to mix the raw material and the catalyst, the reactor is used to carry out the addition reaction, and the distillation column is used to separate the product and the unreacted raw material.

5. Operation Steps

1. Add benzene and formaldehyde into a stirring kettle according to a certain proportion, add catalyst, and stir evenly;
2. Transfer the mixture in the stirring kettle into the reactor, control the reaction temperature and pressure, and carry out addition reaction;
3. After the reaction, transfer the product into a distillation tower for distillation and separation to obtain crude benzyl alcohol;
4. Refine crude benzyl alcohol, A benzyl alcohol product of higher purity was obtained.

6. safety precautions

1. Benzene and formaldehyde are toxic and harmful substances, the operation process should strictly abide by the safety operation procedures, avoid leakage and contact;
2. The addition of catalyst and polymerization inhibitor should pay attention to control the dosage to avoid adverse effects on equipment and environment;
3. The temperature and pressure should be controlled in the distillation process to avoid dangerous situations.

7. environmental protection and sustainable development

benzyl alcohol manufacturing process will produce a certain amount of waste gas and wastewater, should take effective measures to reduce environmental pollution. At the same time, we should actively adopt sustainable production technology and methods to reduce energy consumption and resource consumption, and improve the economic and social benefits of enterprises.

In short, the manufacture of benzyl alcohol needs to strictly abide by safe operation procedures and environmental protection requirements, adopt scientific production technology and equipment, control the quality of raw materials and reaction conditions, and ensure product quality and production safety. At the same time, waste management and resource recycling should be strengthened to achieve sustainable development.

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