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[Chemical Knowledge]：Production method and process flow of methyl tert-butyl acetophenone

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Methyl tert-butyl acetophenone (MTBE) is an important organic chemical raw material, which is widely used in medicine, pesticides, spices and other fields. This article will introduce the manufacturing method of methyl tert-butyl acetophenone, including raw material selection, reaction principle, production process, equipment selection and so on.

1. raw material selection

methyl tert-butyl acetophenone manufacturing raw materials are mainly acetophenone and isobutylene. Among them, acetophenone is a common organic compound, which can be prepared by the reaction of benzene and acetic anhydride. Isobutene can be obtained by naphtha cracking or propylene dimerization.

2. Reaction Principle

The manufacture of methyl tert-butyl acetophenone is mainly through the alkylation reaction of acetophenone and isobutylene under the action of acidic catalyst to generate methyl tert-butyl acetophenone. The reaction equation is as follows:

C6H5COCH3 CH2 = C(CH3)2 → C6H5COCH2C(CH3)3

3. Production Process
The production process of
methyl tert-butyl acetophenone mainly includes the following steps:

1. Preparation of catalyst: The acidic catalyst such as sulfuric acid or acidic ion exchange resin is loaded into the reactor.
2. Mixing of raw materials: mix acetophenone and isobutylene in a certain proportion, and then send them into the reactor.
3. Reaction: Under the action of catalyst, acetophenone and isobutylene are alkylated to generate methyl tert-butyl acetophenone.
4. Separation and purification: After the reaction, the reaction solution is separated and purified to obtain methyl tert-butyl acetophenone with high purity.

4. Equipment Selection

The production of methyl tert-butyl acetophenone requires the use of reactors, mixers, separators and other equipment. When selecting equipment, it is necessary to consider factors such as production scale, raw material characteristics, and product requirements. At the same time, it is also necessary to pay attention to the material, sealing, corrosion resistance and other requirements of the equipment to ensure the reliability and stability of the equipment.

5. precautions

In the production process of methyl tert-butyl acetophenone, the following matters need to be paid attention to:

1. Control the proportion of raw materials and reaction temperature to ensure the smooth progress of the reaction and the purity of the product.
2. Regularly check the operation and maintenance of the equipment to ensure the normal operation and service life of the equipment.
3. Strengthen the safety management of the production site to ensure the safety and reliability of the production process.

In short, the manufacture of methyl tert-butyl acetophenone requires a good grasp of raw material selection, reaction principle, production process, equipment selection and other aspects of knowledge and skills, while the need to strengthen production management and safety management, in order to ensure product quality and production safety.

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