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[Chemical Knowledge]：Manufacturing method and process flow of 2,3-dimethylbutanol

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2,3-Dimethylbutanol (2,3-DMB) is an important raw material for chemical production, which is widely used in fine chemicals, pharmaceuticals, pesticides and other fields. This paper will introduce the manufacturing method of 2,3-dimethylbutanol, including raw material selection, reaction principle, process flow, equipment selection and so on.

1. raw material selection

2,3-dimethylbutanol production raw materials are mainly acetone, hydrogen and methanol. Among them, acetone is a common organic solvent, hydrogen is used as a reducing agent, and methanol is used as an alcoholating agent. These raw materials are relatively easy to obtain, and the price is relatively low.

2. reaction principle

The production of 2,3-dimethylbutanol is mainly completed by the hydrogenation reduction reaction and alcoholization reaction of acetone. Specific reaction principle is as follows:

1. hydrogenation reduction reaction: acetone under the action of hydrogen, through hydrogenation reduction reaction to generate 2-propanol.

2. Alcoholization reaction: 2-propanol and methanol in the role of acidic catalyst, alcoholization reaction to generate 2,3-dimethyl butanol and water.

3. Process

The manufacturing process of 2,3-dimethylbutanol mainly includes the following steps:

1. Acetone hydrogenation reduction: After acetone and hydrogen are mixed in a certain proportion, they enter the hydrogenation reactor, and carry out hydrogenation reduction reaction under the action of a catalyst to generate 2-propanol.

2. Alcoholization reaction: 2-propanol and methanol are mixed according to a certain ratio, and then an acidic catalyst is added into an alcoholization reactor for alcoholization reaction to generate 2,3-dimethylbutanol and water.

3. Distillation and separation: The alcoholization reaction product is subjected to distillation and separation to obtain 2,3-dimethylbutanol product and water.

4. equipment selection

In the manufacturing process of 2,3-dimethylbutanol, hydrogenation reactor, alcoholization reactor, distillation tower and other equipment are needed. When selecting these equipment, it is necessary to comprehensively consider factors such as production scale, product quality, safety and environmental protection, and select the appropriate equipment model and material.

5. operating points

In the manufacturing process of 2,3-dimethyl butanol, the following operating points need to be paid attention to:

1. Control the proportion of raw materials and reaction temperature, pressure and other parameters to ensure the smooth progress of the reaction.

2. The selection and use of the catalyst should be appropriate to ensure the selectivity and efficiency of the reaction.

3. Distillation separation to control the temperature and pressure and other parameters to ensure product quality and yield.

4. Strengthen equipment maintenance and maintenance to ensure the normal operation and service life of the equipment.

In short, the manufacture of 2,3-dimethylbutanol requires a good grasp of raw material selection, reaction principle, process flow, equipment selection and other aspects, while strengthening operation management and safety and environmental protection work, in order to ensure the smooth progress of production and product quality stability.

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