Synthesis of benzyl acetate by using supported polyoxometalate on magnetic nanoparticles as a heterageneous catalyst

Esterification of benzyl alcohol with acetic acid in the liquid phase using phosphotungstic acid stabilization on the substrate, benzyl acetate is used as a Jasmine essential oil. Carboxylic acid esterification is one of the basic reactions in organic chemistry, the speed of which can be increased by increasing the acidic catalyst to the reaction medium. In the reaction of esterification both homogeneous and heterogeneous catalysts can be used. Among the heterogeneous catalyst that can be used, phosphotungstic acid stabilized on magnetic nanoparticles used to esterification carboxylic acids with alcohols to prepare essential oils. The advantage of this is the very easy separation of catalyst from the reaction medium by the magnet. In fact, the application of magnetic nanoparticles in the catalysts as a catalyst base has been considered due to the good spread, the surface to volume ratio, the ease of surface modification, and the very easy and effective separation of the reaction medium. Polyoxometalate are used as a heteropoly acid catalyst on a solid bed that provides this opportunity to heteropoly acid to spread on a wider surface.Solvotermal was used to synthesize magnetic iron oxide nanoparticles. Synthetic iron oxide nanoparticles are called MNP, which have a black color and magnetism. Then phosphotungstic acid، which is stabilized as polyoxometalate on iron oxide magnetic nanoparticles, is used for acidic catalysts. SEM and XRD were used to identify the catalysts, and IR and GC spectra were used for qualitative analysis of the product.The performance of the catalyst in the stringer of benzyl alcohol with acetic acid was investigated. The effects of reaction parameters such as molar ratio of reactants, reaction temperature and optimal time to react, catalytic amount and catalyst reuse of the product were investigated.

Keywords:

Nanoparticle , Phosphotungstic acid , Polyoxometalate , Esterification , Acetic Acid , Benzyl Alcohol , Benzyl acetate.