Current Location： Home > News > Chemical Knowledge > Production and manufacturing method and process flow of dipropylene glycol methyl ether

[Chemical Knowledge]：Production and manufacturing method and process flow of dipropylene glycol methyl ether

Read： 911 Time：14months ago Source：Transform the World with Simplicity

The manufacturing method
of dipropylene glycol methyl ether
1. Introduction

dipropylene glycol methyl ether (DPGM) is an important chemical production raw material, widely used in coatings, inks, cleaning agents, dyes and other fields. Due to its unique chemical properties and wide applications, it is of great significance to study the manufacturing method of dipropylene glycol methyl ether. This article will introduce the manufacturing method of dipropylene glycol methyl ether in detail, including raw material preparation, reaction process, post-treatment and other processes.

2. Raw Material Preparation

The main raw materials for the manufacture of dipropylene glycol methyl ether are dipropylene glycol and methanol. Dipropylene glycol is a colorless, tasteless, non-toxic liquid, with strong hydrophilicity, can be used as a solvent, humectant and so on. Methanol is a colorless, transparent, volatile liquid with strong toxicity, used as solvent and reaction raw material.

3. reaction process

1. esterification reaction

dipropylene glycol and methanol according to a certain proportion into the reaction kettle, adding catalyst sulfuric acid, heating to a certain temperature for esterification reaction. During the reaction, the temperature and pH should be controlled to avoid the occurrence of side reactions. The esterification reaction produces dipropylene glycol methyl ether and water.

2. Dehydration reaction

After the esterification reaction is completed, the reaction solution is cooled to a certain temperature, and an alkaline absorbent is added to react with the acidic catalyst to neutralize the acidic substance. Then, water and unreacted raw materials were distilled off to obtain crude dipropylene glycol methyl ether.

3. distillation purification

crude dipropylene glycol methyl ether for distillation purification, removal of impurities, high purity of dipropylene glycol methyl ether products. In the process of distillation, temperature and pressure should be controlled to ensure the quality and yield of products. The dipropylene glycol methyl ether products
by the

4. post-treatment
need to be quality inspected to ensure that their purity, moisture, acidity and other indicators meet relevant standards. After passing the inspection, it shall be packaged and stored for subsequent use.
Precautions for
5.

1. During the manufacturing process, strictly abide by the safety operation procedures to ensure the safety of employees and equipment.
2. Strictly control the temperature, pressure, pH and other parameters of each process to avoid side reactions and product quality problems.
3. For the waste gas and waste water, it is necessary to carry out effective treatment to meet the requirements of environmental protection.

6. Conclusion The manufacturing method of

dipropylene glycol methyl ether includes raw material preparation, esterification reaction, dehydration reaction, distillation purification and post-treatment. In the manufacturing process, the parameters of each process should be strictly controlled to ensure the quality and yield of the product. At the same time, it is necessary to strengthen safety management and environmental protection management to ensure the smooth progress of the production process. Through the research and improvement of the manufacturing method of dipropylene glycol methyl ether, the quality and production efficiency of the products can be further improved, and the development of the chemical production field can be contributed.

Previous： Manufacturing method and process flow of ethylene glycol butyl ether acetate

Next： Manufacturing method and process flow of ethylene glycol dimethyl ether

News Categories