Improving the selectivity to 4-tert-butylresorcinol by adjusting the surface chemistry of heteropolyacid-based alkylation catalysts
(2018) Journal of Catalysis — Vol. 359, p. 198-211 (2018)
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- Authors
Soetens, Mathieu 
- Abstract
- Keggin tungstophosphoric acid (H3PW12O40, HPW) was immobilized onto Santa Barbara Amorphous (SBA-15) type silica to obtain selective catalysts for the resorcinol tert-butylation with methyl-tert-butyl ether. The challenge was to enhance the reaction selectivity to the mono-alkylated product i.e. 4-tert-butylresorcinol at the expenses of other more thermodynamically favored products as the 4,6-di-tert-butylresorcinol. Using HPW@SBA15 catalysts, remarkable selectivity to 4-tert-butylresorcinol was obtained, up to 42% (at 20% of resorcinol conversion). Our finding is that the change in the product distribution was dependent on the catalyst surface chemistry: 4TBR selectivity can be increased adjusting the fraction of Brønsted acid sites versus Lewis ones at the catalyst surface.
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Citations
Pezzotta, C., Fleury, G., Soetens, M., Van der Perre S., J.F.M. Denayer, Riant, O., & Gaigneaux, E. (2018). Improving the selectivity to 4-tert-butylresorcinol by adjusting the surface chemistry of heteropolyacid-based alkylation catalysts. Journal of Catalysis, 359, 198-211. https://doi.org/10.1016/j.jcat.2018.01.010 (Original work published 2018)