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[Chemical Knowledge]：Production process and preparation method of diacetone alcohol

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Diacetone alcohol is an important organic compound with a wide range of applications. It can be used as a solvent, surfactant, plasticizer, lubricant, etc., and can also be used in food, medicine and other fields. Therefore, the production process and preparation method of diacetone alcohol have attracted much attention. This article will introduce the production process and preparation method of diacetone alcohol.

1. diacetone alcohol production process

At present, the production of diacetone alcohol mainly uses two processes, one is the hydrogenation process, the other is the alcoholization process.

1. Hydrogenation process: Acetone is hydrogenated to diacetone alcohol. This method is low in cost, but it requires a high-pressure container and also has safety hazards. The specific reaction conditions are: under a hydrogen atmosphere and under the action of a copper-based catalyst, acetone and hydrogen are reacted through a high-pressure container to generate diacetone alcohol. The ratio of reactants is acetone: hydrogen = 1.5:1, the reaction temperature is 120-150 ° C., and the reaction pressure is 30-50MPa.

2. Alcoholation Process: Acetone and isopropanol are reacted to form diacetone alcohol. The reaction conditions of this method are mild, easy to operate, but the cost is high. The specific reaction conditions are: using alkali metal or alkaline earth metal as a catalyst to adjust the ratio of reactants, and reacting acetone and isopropanol at a mild temperature to produce diacetone alcohol. The ratio of reactants is acetone: isopropanol = 1:1, the reaction temperature is 50-60 ° C., and the reaction time is 5-6 hours. The preparation method of

2. diacetone alcohol

1. Preparation from acetone and isopropanol: This method has a higher cost, but the product purity is higher.

2. Preparation by Butanediol and Formaldehyde: This method requires high temperature reaction conditions, but high purity diacetone alcohol can be obtained. The specific reaction conditions are as follows: in a hydrogen atmosphere of formaldehyde, butanediol is subjected to a condensation reaction to generate diacetone alcohol. The ratio of reactants is butanediol: formaldehyde = 2:1, the reaction temperature is 200-240 ° C., and the reaction time is 2-3 hours.

3. conclusion

diacetone alcohol is an important organic compound, and the study of its production process and preparation method is of great significance to promote its application. When selecting the production process and preparation method, the cost, safety, easy operation and product quality should be considered, and the most suitable process and method should be selected.

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