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[Chemical Knowledge]：Production process and preparation method of isophorone (IP)

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Isophorone (IP) is an important organic chemical raw material, widely used in dyes, pharmaceuticals, spices and other fields. This article will introduce its production process and preparation method in detail.

1. production process

The production process of isophorone (IP) is mainly divided into ethanol method and oxidation method.

1. Ethanol Method

This method uses isophorone (IP) to react with ethanol in the presence of a catalyst.

reaction equation is as follows:

isophoric acid ethyl ethanol→isophorone (IP) ethyl acetate

The reaction conditions of this method are mild, the reactants are easy to obtain, the product purity is high, but the production cost is high.

2. Oxidation

This process employs the oxidation of benzaldehyde and isoprene in the presence of an oxidizing agent to obtain isophorone (IP). The

reaction equation is as follows:

benzaldehyde isoprene oxygen → isophorone (IP) water

the reactants of this method are easy to obtain, but the reaction conditions are harsh, the product separation is difficult, and multiple separation, washing and recovery steps are required, and the process is difficult.

2. Preparation Method

1. Ethanol Method Preparation Method:

(1) Add isophoric acid ester and ethanol into a reactor, add a catalyst, and perform a heating reaction.

(2) When reacted to a certain extent, isophorone (IP) was collected by distillation under reduced pressure. The isophorone (IP) received is refined

(3) to obtain a high-purity product.

2. Preparation method of oxidation method:

(1) Benzaldehyde, isoprene and oxidizing agent are added into the reactor, and the reaction is heated for oxidation.

(2) The reactant is subjected to separation, washing and the like, and then isophorone (IP) is obtained by distillation or extraction. The isophorone (IP) received is refined

(3) to obtain a high-purity product.

3. conclusion

isophorone (IP) is a very important organic chemical raw material, and its production process and preparation method have a great impact on product quality and economic benefits. According to different production requirements, different production processes and preparation methods need to be selected according to the actual situation.