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[Chemical Knowledge]：Production method and process flow of p-tert-butyl cyclohexanol

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The manufacturing method
of p-tert-butyl cyclohexanol
1. Introduction

p-tert-butyl cyclohexanol is an important raw material for chemical production, which is widely used in fine chemical industry, medicine, pesticide and other fields. Due to its unique chemical properties and wide range of applications, the manufacturing method of p-tert-butyl cyclohexanol has attracted much attention. This paper will introduce the manufacturing method of tert-butyl cyclohexanol in detail, including the selection of raw materials, reaction principle, operation steps, equipment requirements and so on.

2. raw material selection

the main raw materials for the manufacture of p-tert-butyl cyclohexanol are cyclohexanone and isobutylene. Cyclohexanone can be prepared by phenol hydrogenation, cyclohexanol dehydrogenation and other methods, and isobutylene can be prepared by naphtha cracking, propylene dimerization and other methods. When selecting raw materials, it is necessary to ensure their purity and quality to avoid adverse effects on subsequent reactions.

3. Reaction Principle

The production method of p-tert-butyl cyclohexanol mainly adopts the principle of addition reaction. Specifically, isobutylene and cyclohexanone undergo an electrophilic addition reaction under the action of an acidic catalyst to generate p-tert-butyl cyclohexanol. During the reaction, the double bond of isobutylene is opened and an addition reaction occurs with the carbonyl group of cyclohexanone to form new carbon-carbon bonds and carbon-oxygen bonds.

4. operation steps

1. ingredients: according to a certain proportion of cyclohexanone and isobutylene into the reaction kettle.
2. Add catalyst: add the acid catalyst to the reaction kettle and stir evenly.
3. heating reaction: increase the reaction kettle temperature, maintain a certain reaction time, so that isobutylene and cyclohexanone fully react.
4. Cooling and separation: After the reaction is completed, the reaction solution is cooled to a certain temperature to precipitate crystals of p-tert-butylcyclohexanol.
5. Filtration and drying: The crystals were separated from the mother liquor by filtration, and the crystals were dried to obtain pure p-tert-butyl cyclohexanol product.

5. equipment requirements

In order to ensure the smooth progress of the manufacturing process of p-tert-butyl cyclohexanol, it is necessary to select appropriate reaction equipment and auxiliary equipment. Specifically, the reaction equipment needs to have the characteristics of high temperature resistance, corrosion resistance, and good sealing performance to ensure the safety and stability of the reaction process. At the same time, it is also necessary to be equipped with auxiliary equipment such as a stirring device, a temperature control device, and a pressure control device to meet different needs in the reaction process.
Precautions for
6.

1. During operation, it is necessary to strictly control the reaction temperature and pressure to avoid excessive or low temperature and pressure from adversely affecting the reaction.
2. It is necessary to regularly maintain and maintain the reaction equipment and auxiliary equipment to ensure its normal operation and extend its service life.
3. In the treatment of tert-butyl cyclohexanol products, it is necessary to pay attention to avoid contact with oxidants, acids and other substances, so as not to cause chemical reactions or endanger human health.

7. conclusion The manufacturing method of

p-tert-butyl cyclohexanol involves the selection of raw materials, reaction principle, operation steps, equipment requirements and so on. 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 operating requirements of each link. At the same time, it is also necessary to strengthen the maintenance and maintenance of the equipment to ensure the normal operation and service life of the equipment.

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