Application of dielectric properties in microwave-assisted esterification reaction before reaching boiling

摘要

Esterification reaction of para-hydroxybenzoic acid with ethanol before reaching boiling point was investigated under microwave irradiation. The relationship between temperature profile and those factors that affect microwave heating such as dielectric properties (dielectric constant and dielectric loss factor) was proposed. This ifnormation is helpful to understand and make good use of microwave irradiation assisted chemical reaction and give some prospect to the reaction performing under microwave irradiation due to its avoiding the higher temperature resulting in the danger such as explosion.