Manufacturing method of bisphenol A polyoxypropylene ether series
I. INTRODUCTION
Bisphenol A polyoxypropylene ether series is an important raw material for the production of chemicals, which is widely used in the fields of coatings, inks, detergents, and plastic processing aids. Due to its unique chemical properties and wide range of applications, the manufacturing method of bisphenol A polyoxypropylene ether series has attracted much attention. In this paper, the manufacturing method of Bisphenol A polyoxypropylene ether series will be introduced in detail, including raw material preparation, polymerization reaction, post-treatment and other processes.
Second, raw material preparation
The manufacture of bisphenol A polyoxypropylene ether series requires the preparation of the following raw materials: bisphenol A, propylene oxide, catalysts, solvents and so on. Among them, bisphenol A and propylene oxide are the main reactants, catalyst is used to promote the polymerization reaction, and solvent is used to adjust the viscosity of the reaction system.
Three, polymerization reaction
The key step in the manufacture of bisphenol A polyoxypropylene ether series is the polymerization reaction. Specific steps are as follows:
1. Add bisphenol A and catalyst into the reactor and heat to a certain temperature.
2. Gradually add propylene oxide dropwise while controlling the reaction temperature and pressure, so that propylene oxide and bisphenol A undergo ring-opening polymerization reaction.
3. After dropping, continue to hold the reaction for a certain period of time, so that the molecular chain grows fully.
4. Post-treatment
After the polymerization reaction is completed, post-treatment is required to obtain high-quality bisphenol A polyoxypropylene ether products. Specific steps are as follows:
1. Cool down the reactor, pour the reaction solution into the dispensing funnel, and wash with water to remove the catalyst and unreacted raw materials.
2. After layering, pour off the upper aqueous solution, and filter the lower organic phase with a vacuum pump to remove water and impurities.
3. The crude product obtained was recrystallized with a solvent to obtain a bisphenol A polyoxypropylene ether product with higher purity.
V. Precautions
1. During the polymerization reaction, the reaction temperature and pressure need to be strictly controlled to prevent the occurrence of side reactions and decomposition of the product.
2. In the post-treatment process, adequate washing and filtration are needed to ensure the quality of the product.
3. During the whole manufacturing process, safety needs to be observed to avoid contacting sensitive parts such as skin and eyes.
VI.CONCLUSION
The manufacturing method of bisphenol A polyoxypropylene ether series includes the processes of raw material preparation, polymerization reaction and post-treatment. By strictly controlling the reaction conditions and post-treatment processes, high-quality bisphenol A polyoxypropylene ether products can be obtained. The products have a wide range of application prospects, and can provide important raw material support for the fields of coatings, inks, detergents, plastic processing aids and so on.
