Lewis acid metal cations exchanged heteropoly salts as catalysts in β-pinene etherification

@article{daSilva2020LewisAM,
  title={Lewis acid metal cations exchanged heteropoly salts as catalysts in $\beta$-pinene etherification},
  author={M{\'a}rcio Jos{\'e} da Silva and Lorena Christina de Andrade Leles and Milena Galdino Teixeira},
  journal={Reaction Kinetics, Mechanisms and Catalysis},
  year={2020},
  volume={131},
  pages={875 - 887}
}
In this work, the protons of the Keggin heteropolyacids were exchanged by Lewis acid metal cations generating salts that were evaluated as catalysts on the β-pinene etherification with alkyl alcohols. The Fe(III) phosphotungstate salt (i.e. FePW12O40) was the most active and selective catalyst toward the formation of α-terpinyl methyl ether, the main reaction product. The activity of FePW12O40 catalyst was higher than their precursors of synthesis (i.e. H3PW12O40, Fe(NO3)3), other Fe(III… 
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