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[Chemical Knowledge]：Preparation of Benzyl Alcohol and Precautions

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In the field of organic synthesis, benzyl alcohol is widely used in medicine, dyes, spices and other fields, and its preparation method is also related to the purity and yield of the product. In the preparation of benzyl alcohol, the following aspects need to be paid attention to:

1. Raw material selection: The raw materials for the preparation of
benzyl alcohol mainly include benzaldehyde and reducing agent. The purity and quality of benzaldehyde have a great influence on the purity and yield of the final product. Therefore, when selecting benzaldehyde, it is necessary to ensure that it has high purity and no impurities. The choice of reducing agent is also very important. Commonly used reducing agents are metal sodium, metal aluminum, etc., which need to be selected according to specific experimental conditions and product requirements.

2. Control of reaction conditions: The reaction conditions for the preparation of
dibenzyl alcohol have an important influence on the quality and yield of the product. The reaction conditions for the preparation of benzyl alcohol are usually carried out under basic conditions, and the selection of suitable reaction temperature and time has a direct impact on the purity and yield of the product. In addition, the experimental details such as stirring speed and oxygen exclusion also need to be strictly controlled.

3. reaction process monitoring:
in the preparation of benzyl alcohol experiment, need to monitor the reaction process at any time. For organic synthesis experiments, the input speed of raw materials in the reaction process, the judgment of the reaction end point and the separation of intermediate products all need to be ensured by instrument monitoring and experimental experience.

4. Product extraction and purification: After the
preparation is completed, the product needs to be extracted and purified. Suitable extraction solvents and purification methods can effectively improve the purity of the product and reduce the residual impurities.

To sum up, the preparation of benzyl alcohol needs to be strictly controlled in many aspects, such as raw material selection, reaction condition control, reaction process monitoring and product extraction and purification. Only by striving for perfection in every link can we obtain high-quality benzyl alcohol products to meet the needs of different fields.

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