Manufacturing Method of Benzyl Alcohol
Benzyl alcohol is an important organic chemical raw material, which is widely used in the fields of medicine, spices, dyes, plastics and so on. In this article, we will introduce the manufacturing method of benzyl alcohol, including raw materials, process flow, reaction principle, equipment, operation steps, safety precautions, and environmental protection and sustainable development.
I. Raw materials and formulations
The raw materials for the manufacture of benzyl alcohol are mainly benzene and formaldehyde, of 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, catalyst and blocking agent can be added appropriately.
II. Process flow
The manufacturing process of benzyl alcohol mainly consists of the following steps:
1. benzene and formaldehyde under the action of catalyst carry out addition reaction to generate benzyl alcohol;
2. the unreacted benzene and formaldehyde are separated by distillation, and crude benzyl alcohol is obtained;
3. the crude benzyl alcohol is refined, and benzyl alcohol product with higher purity is obtained.
3. Reaction Principle
The reaction principle for the manufacture of benzyl alcohol is the addition reaction between benzene and formaldehyde under the action of an acidic catalyst to produce benzyl alcohol. Commonly used catalysts include p-toluenesulfonic acid, sulfuric acid and so on.
Four, equipment and devices
The reaction equipment to be used for the manufacture of benzyl alcohol includes stirring kettle, reactor, distillation tower and so on. Among them, the stirring kettle is used to mix the raw materials and catalyst, the reactor is used to carry out the addition reaction, and the distillation tower is used to separate the products from the unreacted raw materials.
V. OPERATING STEPS
1. benzene and formaldehyde are added to the stirring kettle according to a certain ratio, the catalyst is added, and the mixture is stirred evenly;
2. the mixture in the stirring kettle is transferred to a reactor, and the reaction temperature and pressure are controlled to carry out the addition reaction;
3. after the reaction is finished, the product is transferred to a distillation tower, and distillation is carried out for separating the product and obtaining the crude benzenemethanol;
4. the crude benzenemethanol is purified and a product of higher purity of benzenemethanol is obtained. 4. Refine the crude benzyl alcohol to obtain the higher purity benzyl alcohol product. Safety Precautions
1. Benzene and formaldehyde are toxic and hazardous substances, the operation process should strictly comply with the safety regulations to avoid leakage and contact;
2. The addition of catalysts and depolymerization blocking agents should be careful to control the dosage, to avoid adverse effects on the equipment and the environment;
3. Temperature and pressure should be controlled during the distillation process, to avoid hazardous situations.
VII. Environmental protection and sustainable development
The manufacturing process of benzyl alcohol will produce certain waste gas and waste water, effective treatment measures should be taken to reduce the pollution of the environment. At the same time, sustainable production technologies and methods should be actively adopted to reduce energy and resource consumption and improve the economic and social benefits of the enterprise.
In conclusion, the manufacture of benzyl alcohol needs to strictly abide by the safety operation regulations and environmental protection requirements, adopt scientific production process and equipment, control the quality of raw materials and reaction conditions, and ensure product quality and production safety. Meanwhile, waste management and resource recycling should be strengthened to realize sustainable development.
