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[Chemical Knowledge]：Production process and preparation method of diethanol isopropanolamine

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Diethanol isopropanolamine is an important chemical raw material, which is widely used in many fields, such as coatings, resins, plastics, surfactants and so on. The purpose of this paper is to introduce the production process and preparation method of diethanol isopropanolamine.

1. diethanol isopropanolamine production process

industrial production of diethanol isopropanolamine process mainly has the following:

1. ammonia production process

this method is the use of ammonia and ethylene glycol, isopropanol in the appropriate reaction conditions of synthesis of diethanol isopropanolamine. Ethylene glycol and isopropyl alcohol are mixed according to a certain proportion to make a mixture containing 50% water, which is added into an ammonia reaction kettle after preheating, and the product obtained after the reaction is washed with water, distilled, etc. to obtain diethanol isopropanolamine.

2. Oxidation process

This method is the use of oxygen oxidation reaction to produce diethanol isopropanolamine. Ethylene glycol and isopropyl alcohol are mixed in a certain proportion and then added to the reaction kettle, and the catalyst and oxygen are added to the reaction product under certain conditions. After the reaction, diethanol isopropanolamine is obtained by distillation and other treatments.

3. reduction method production process

this method is the use of reducing agent reduction aldehyde products to obtain diethanol isopropanolamine. The specific process flow is as follows: acetaldehyde and acetone first react to generate 2-methyl-1-propanol, and then reduce to diethanolisopropanolamine under the action of a reducing agent.

The above three processes have their advantages and disadvantages, according to the production needs and economic situation, you can choose the appropriate process.

2. diethanol isopropanolamine preparation method

in the laboratory, the commonly used method is the use of ethylene glycol and isopropyl alcohol mixed according to a certain proportion, adding ammonia or triethylamine and other alkaline catalyst, in the constant temperature, stirring reaction conditions, after the reaction by distillation or other processing methods to get the product. Under different preparation methods, the purity and yield of the obtained products are also different.

In industry, the preparation of diethanol isopropanolamine needs to consider the quality of raw materials, reaction conditions, catalyst types and operation control. Under different technological processes, the requirements of raw materials, reactor configuration, reaction temperature, pressure, gas flow, stirring speed and other parameters are also different, so it is necessary to develop a set of perfect process flow and standard operating procedures, and strictly in accordance with the procedures for production operations.

diethanol isopropanolamine is an important chemical raw material, which is widely used in laboratory and industry. Studying and mastering its production process and preparation method can provide strong support for its industrial production and application.