Dipropylene glycol methyl ether is a versatile alcohol ether solvent with a wide range of uses, including but not limited to:
1. Solvents for printing inks and lacquers : used to regulate the viscosity of inks and coatings, to help improve the fluidity and uniformity of coatings.
2. Cleaning solvent for cutting oil and working oil : In industrial applications, dipropylene glycol methyl ether is used as cutting fluid and cleaning agent to help remove oil and impurities produced in the process of metal processing.
3. Household and industrial cleaner : used to clean hard surfaces and metal parts in household and industrial environments, with good cleaning effect.
4. Ingredients in cosmetics and personal care products : Because of its good solubility and low irritation, dipropylene glycol methyl ether is often used as an ingredient in cosmetics and personal care products, such as skin care products and shampoos.
5. Stabilizers for agricultural insecticides : In agriculture, it is used as a stabilizer for insecticides to help maintain the activity and effectiveness of insecticides.
6. Coagulant for floor brighteners : In the field of cleaning and maintenance, dipropylene glycol methyl ether is used as a coagulant for floor brighteners to help improve the gloss and durability of the floor.
The synthesis method of dipropylene glycol methyl ether mainly includes the following steps:
1. Esterification reaction : dipropylene glycol and methanol are added to the reactor in a certain proportion, and the catalyst sulfuric acid is added, and heated to a certain temperature for esterification reaction. Temperature and pH should be controlled during the reaction to avoid side reactions. The esterification reaction produces dipropylene glycol methyl ether and water.
2. Dehydration reaction : After the esterification reaction, the reaction liquid is cooled to a certain temperature, and the alkaline absorbent is added to react with the acidic catalyst to neutralize the acidic substance. It is then distilled to steam out the water and the unreacted raw material to produce crude dipropylene glycol methyl ether.
3. Rectification and purification : the crude dipropylene glycol methyl ether is purified by rectification and purification, the impurities are removed, and the high purity dipropylene glycol methyl ether products are obtained. The temperature and pressure should be controlled during distillation to ensure the quality and yield of the product.
4. After-treatment : the obtained dipropylene glycol methyl ether products need to be inspected to ensure that the purity, moisture, acidity and other indicators meet the relevant standards. After passing the inspection, it will be packed and stored for subsequent use.
In summary, dipropylene glycol methyl ether is not only a multifunctional solvent and chemical raw material, its synthesis method is relatively mature, widely used in many fields .
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