Abstract
The extensive demand for cleaner environment is forcing chemical industry to use less hazardous materials. In this regard, heteropolyacids attracted considerable amount of interest due to the less toxic behavior in addition of possessing higher acidity. Heteropoly acids have been used as catalysts for the reaction of salicylic acid with acetic anhydride. The performance of different forms of heteropoly acids in the presence of acetic anhydride as acetylating agent for acetylation of salicylic acid was compared. The best conditions were observed using Preyssler and Silica-supported Preyssler Nanoparticles as catalysts. The catalyst is recyclable and reusable.
Highlights
The drive to develop green processes has led to the development of solid acid catalysts to a significant increase in research activities both in academic and industrial sections
A variety of materials have been used as solid acid catalysts such as clays, zeolites, sulfated metal oxides, heteropoly acids (HPAs), etc
In our attempt to use HPAs as catalysts in organic reactions, we reported that Preyssler type of HPAs, H14[NaP5W30O110], shows strong catalytic characterization[12]
Summary
The drive to develop green processes has led to the development of solid acid catalysts to a significant increase in research activities both in academic and industrial sections. In our attempt to use HPAs as catalysts in organic reactions, we reported that Preyssler type of HPAs, H14[NaP5W30O110], shows strong catalytic characterization[12]. Esterification of salicylic acid with acetic anhydride was carried out with Preyssler and Silica-Suported NanoPreyssler. This solution was cooled to room temperature, and 25 mL of concentrated phosphoric acid was added.
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