Manufacturing method of propanol
I. INTRODUCTION
Propanol is an important organic chemical raw material, which is widely used in the fields of pharmaceuticals, pesticides, spices, solvents and plastics. With the continuous development of science and technology, the manufacturing method of propanol has been improved and optimized, which improves the production efficiency and reduces the cost, and further promotes the application of propanol in various fields. This article will introduce the manufacturing method of propanol in detail.
II. Properties and Uses of Propanol
Propanol is a colorless, transparent, flammable, irritating odor liquid with strong hydrophilicity, which is miscible with solvents such as water, ethanol, ether and other solvents. Propanol has three isomers, n-propanol, isopropanol and tert-butanol, of which n-propanol and isopropanol are more widely used. Propanol is mainly used in the production of solvents, plasticizers, stabilizers, antioxidants, surfactants, etc. It can also be used in the manufacture of pharmaceuticals, pesticides, spices and other fine chemicals.
Three, the manufacturing method of propanol
1. Propylene hydration method
Propylene hydration method is one of the main methods for manufacturing propanol. This method takes propylene and water as raw materials, and under the action of acidic catalyst, propanol is generated through hydration reaction. The reaction conditions of propylene hydration method are relatively mild, the operation is simple and the production cost is low, so it is widely used. However, the method also produces some by-products, such as acetone and propionaldehyde, which need to be separated and purified.
2. Ethylene Carbonyl Synthesis
Ethylene carbonyl synthesis is a more advanced method for the manufacture of propanol. The method uses ethylene, carbon monoxide and hydrogen as raw materials, and under the action of catalyst, undergoes a carbonylation reaction to produce propionaldehyde, and then a hydrogenation reaction to produce propanol. The method has the advantages of high atom utilization, low by-products and high product quality, but the catalyst is costly and needs to be regenerated and replaced periodically.
3. Acrylate Hydrogenation
Acrylate hydrogenation is a method of manufacturing propanol from acrylate and hydrogen. In this method, acrylate is first mixed with hydrogen and then hydrogenation reaction is carried out in the presence of catalyst to produce propanol. This method has the advantages of easy availability of raw materials, mild reaction conditions, and high product quality, but the catalyst activity will be inhibited and needs to be regenerated and replaced periodically.
Four, the manufacturing process of propanol
The manufacturing process of propanol mainly includes the steps of raw material pretreatment, reaction, separation and purification. Specifically, the raw materials need to be pretreated first, such as desulfurization and dehydration, to ensure the smooth progress of the reaction. Then, the reaction is carried out under the action of catalyst to generate propanol and by-products. At the end of the reaction, the products need to be separated and purified to obtain high purity propanol products.
V. Precautions in the manufacturing process of propanol
In the manufacturing process of propanol, the following matters need to be paid attention to:
1. Strictly controlling the reaction conditions, such as temperature, pressure, catalyst dosage, etc., in order to ensure the smooth progress of the reaction and the quality of the products;
2. Conducting strict quality testing and control of the raw materials and the products, in order to ensure the quality and purity of the products;
3. Strengthening the maintenance and upkeep of the equipments, to Ensure the normal operation and service life of the equipment;
4. Strengthen the management of production safety, comply with the relevant regulations and standards, and ensure the safety and environmental hygiene in the production process.
VI. Conclusion
In conclusion, there are various manufacturing methods of propanol, and different methods have different advantages and disadvantages and scope of application. In the actual production process, it is necessary to choose the appropriate manufacturing method according to the specific situation, and strictly control the reaction conditions and product quality to ensure the production efficiency and product quality of propanol.
