Manufacturing method of isononanol
Isononanol is an important raw material for the production of chemicals, which is widely used in the fields of coatings, inks, detergents, plastic plasticizers and so on. In this article, we will introduce the manufacturing method of isononanol, including raw material preparation, reaction process, post-processing and other aspects.
I. Raw material preparation
The manufacture of isononanol requires the preparation of the following raw materials: propylene, carbon monoxide, hydrogen. Among them, propylene is the main raw material, and carbon monoxide and hydrogen are auxiliary raw materials.
II. Reaction process
The manufacture of isononanol mainly adopts the carbonyl synthesis method, the specific steps are as follows:
1. Propylene hydroformylation reaction: after mixing propylene, carbon monoxide and hydrogen, the hydroformylation reaction is carried out to generate propanal under the action of high temperature, high pressure and catalyst.
2. propionaldehyde condensation reaction: propionaldehyde is condensed in the presence of an acidic catalyst to form isononyl aldehyde.
3. Isononanal hydrogenation: Isononanal is hydrogenated to form isononanol in the presence of a catalyst.
In the above reaction process, the following control elements need to be paid attention to: reaction temperature, pressure, catalyst type and dosage, and reaction time. The control of these elements has an important influence on the product yield, purity, color and other quality indicators.
Third, post-processing
After the reaction is completed, post-processing is needed, including distillation, extraction, distillation and other steps, in order to obtain isononanol products with higher purity. At the same time, waste needs to be treated to avoid pollution of the environment.
4. Precautions
In the manufacturing process of isononanol, the following matters need to be noted:
1. Selection and use of catalyst: different catalysts have different effects on the reaction, and need to be selected and used according to the actual situation.
2. Control of reaction temperature and pressure: The control of reaction temperature and pressure has an important influence on the reaction and the quality of the product, and needs to be adjusted according to the actual situation.
3. Disposal of waste: Waste needs to be properly disposed of to avoid pollution of the environment.
All in all, the manufacture of isononanol needs to master the corresponding technology and methods, and at the same time, it needs to pay attention to safety, environmental protection and other aspects, in order to ensure the quality of the product and the smooth progress of production.
