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[Chemical Knowledge]：Production process and preparation method of isopropylamine

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Isopropylamine is an important chemical raw material and pharmaceutical raw material, which is widely used in various chemical fields. This article will introduce the production process and preparation method of isopropylamine, hoping to provide reference for researchers and practitioners in related industries.

1. isopropylamine production process
The production process of
isopropylamine generally uses hydrogen and propylene dehydrogenation reaction, referred to as PDH method. PDH method is an important method for preparing high-purity isopropylamine from low-carbon olefins. The whole process of PDH method mainly includes the following stages:
The first stage is natural gas processing. In general, natural gas and derived gases containing a small amount of ethylene and propylene reach the process requirements through steps such as pressurization and acid removal, and are treated with water and copper catalysts to remove impurities such as hydrogen sulfide and furan. The second stage of the
is hydrogen production. After the natural gas is steam reformed, synthesis gas is generated, thereby generating hydrogen. The process typically employs a metal catalyst.
the third stage is the isopropylamine separation. After hydrogen production, a mixture of isopropylene and propylene is obtained by dehydrogenation reaction with propylene, and then isopropylene and propylene are separated by distillation process.
fourth stage is isopropylamine preparation. Isopropyl alcohol is obtained by hydrogenating isopropene, and isopropyl alcohol is reacted to form isopropylamine. In this process, non-noble metal catalysts, such as copper-based and palladium-based catalysts, are usually used.

2. isopropylamine preparation method
The preparation method of
isopropylamine generally includes two kinds: one is ammonia gas method, the other is addition method.
ammonia method: this method is acetone and ammonia in the presence of catalyst reaction preparation of isopropylamine. The ammonia method is easy to operate and the process is simple, but the purity of the product is low, generally 70% to 80%.
addition method: the method is generally propylene and methylamine addition reaction to obtain propyl amino methanol, and then through the removal of water and de-amine reaction to prepare isopropyl amine. The purity of the addition method product is high, generally reaching 95% to 99%.
, it should be noted that since the preparation and production process of isopropylamine involves many chemical reactions and process control, strict operation and high safety precautions are required to ensure the safety of workers and the quality of products.

In this article, we introduce the production process and preparation methods of isopropylamine, including PDH method, ammonia gas method and additive method. The PDH method is an important method for the preparation of high purity isopropylamine, and the ammonia method and the addition law are the more common methods for the preparation of isopropylamine. No matter which method is adopted, strict operation and high safety precautions are required to ensure the safety of workers and the quality of products.

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