Manufacturing method of p-tert-butylcyclohexanol
I. INTRODUCTION
p-tert-butylcyclohexanol is an important raw material for the production of chemicals, which is widely used in the fields of fine chemicals, pharmaceuticals, pesticides and so on. Due to its unique chemical properties and wide range of applications, the manufacturing method of p-tert-butylcyclohexanol has attracted much attention. In this paper, the manufacturing method of p-tert-butylcyclohexanol will be introduced in detail, including raw material selection, reaction principle, operation steps, equipment requirements and other aspects of the content.
II. Selection of raw materials
The main raw materials for manufacturing p-tert-butylcyclohexanol are cyclohexanone and isobutylene. Among them, cyclohexanone can be produced by phenol hydrogenation, cyclohexanol dehydrogenation and other methods, and isobutene can be produced by naphtha cracking, propylene dimerization and other methods. When choosing raw materials, it is necessary to ensure their purity and quality to avoid adverse effects on the subsequent reaction.
Three, reaction principle
The manufacturing method of p-tert-butylcyclohexanol mainly adopts the principle of addition reaction. Specifically, isobutylene and cyclohexanone under the action of an acidic catalyst undergo an electrophilic addition reaction to generate p-tert-butylcyclohexanol. During this reaction, the double bond of isobutene opens and undergoes an addition reaction with the carbonyl group of cyclohexanone, forming new carbon-carbon and carbon-oxygen bonds.
4. Operation steps
1. Dosing: add cyclohexanone and isobutene into the reactor according to a certain proportion.
2. Add catalyst: Add acid catalyst into the reaction kettle and stir well.
3. Heating and reaction: Increase the temperature of the reaction kettle and keep it for a certain reaction time, so as to make isobutylene and cyclohexanone fully react.
4. Cooling and separation: after the reaction is finished, cool the reaction liquid to a certain temperature and precipitate p-tert-butylcyclohexanol crystals.
5. Filtration and drying: Separate the crystals from the mother liquor by filtration, and dry the crystals to get pure p-tert-butylcyclohexanol product.
5. Equipment requirements
In order to ensure that the manufacturing process of p-tert-butylcyclohexanol goes smoothly, it is necessary to choose suitable reaction equipment and auxiliary equipment. Specifically, the reaction equipment needs to be characterized by high temperature resistance, corrosion resistance and good sealing to ensure the safety and stability of the reaction process. At the same time, it also needs to be equipped with stirring device, temperature control device, pressure control device and other auxiliary equipment to meet the different needs of the reaction process.
VI. Precautions
1. In the operation process, the reaction temperature and pressure need to be strictly controlled to avoid too high or too low temperatures and pressures adversely affecting the reaction.
2. It is necessary to maintain and repair the reaction equipment and auxiliary equipment regularly to ensure their normal operation and prolong service life.
3. When handling p-tert-butylcyclohexanol products, care needs to be taken to avoid contact with oxidizers, acids and other substances that may cause chemical reactions or endanger human health.
VII.CONCLUSION
The manufacturing method of p-tert-butylcyclohexanol involves the selection of raw materials, reaction principle, operation steps, equipment requirements and other aspects. In order to ensure the smooth progress of the manufacturing process and the stability of product quality, it is necessary to strictly control the process parameters and operational requirements of each link. At the same time, it is also necessary to strengthen the maintenance and repair of equipment to ensure the normal operation and service life of the equipment.
