Manufacturing method of isobutenol
Isobutenol is an important organic chemical raw material, which is widely used in fine chemicals, pharmaceuticals, pesticides and other fields. This article will introduce the manufacturing method of isobutenol, including raw material preparation, reaction process, post-treatment and other process steps.
I. Raw material preparation
The main raw materials for manufacturing isobutylene alcohol are isobutylene and formaldehyde. Among them, isobutylene can be obtained through petroleum cracking or natural gas conversion, etc., and formaldehyde can be prepared through methanol oxidation. During the preparation of raw materials, it is necessary to ensure the purity and quality of raw materials to avoid adverse effects on the subsequent reaction.
II. Reaction process
The manufacturing process of isobutylene alcohol mainly includes two steps: addition reaction and hydrogenation reaction. The specific steps are as follows:
1. Addition reaction
Under the action of acidic catalyst, isobutene and formaldehyde undergo an addition reaction to produce 3-methyl-3-buten-1-ol. The reaction is generally carried out at a lower temperature to avoid side reactions. Commonly used acid catalysts include sulfuric acid and phosphoric acid.
2. Hydrogenation reaction
3-methyl-3-buten-1-ol undergoes hydrogenation to give isobutenol. The hydrogenation reaction is generally carried out in the presence of high pressure hydrogen and the catalysts are noble metal catalysts such as palladium/carbon and platinum/carbon. The hydrogenation reaction can reduce the double bond to a single bond while keeping the alcohol hydroxyl group unreduced.
III.Post-treatment
After the reaction, the product needs to be post-treated to obtain isobutylene alcohol with higher purity. The post-treatment process includes steps such as distillation, washing and drying to remove impurities and moisture. At the same time, the equipment needs to be cleaned and maintained to ensure the normal operation of the equipment and the quality of the product.
4. Precautions
In the process of manufacturing isobutylene alcohol, the following matters need to be paid attention to:
1. Strictly control the quality and purity of raw materials in order to avoid adverse effects on the subsequent reaction;
2. According to the specific reaction conditions and equipment, select the appropriate reaction temperature and pressure;
3. In the addition reaction and hydrogenation reaction, it is necessary to select the appropriate catalysts and reaction conditions, in order to improve the selectivity and yield of the product;
4. In the post-treatment process, the purity and quality of the product need to be ensured to avoid adverse effects on the application of the product;
5. In the production process, it is necessary to strengthen the maintenance of the equipment and the operation management to ensure the normal operation of the equipment and the safety of the employees.
In conclusion, the method for manufacturing isobutylene alcohol involves a number of process steps and precautions, and the operating conditions and parameters of each link need to be strictly controlled to ensure the quality and purity of the product. At the same time, production management and equipment maintenance need to be strengthened to ensure the smooth running of the production process and the safety of employees.
