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Activated clay supported heteropoly acid catalysts for esterification of acetic acid with butanol
Abstract The esterification of acetic acid with primary (n-), secondary (sec-) and tertiary (ter-) butanol catalyzed by supported heteropoly acids (HPAs), such as dodecatungstophosphoric acid (TPA), dodecatungstosilicic acid (TSA) and dodecamolybdophosphoric acid (MPA) on acid activated Bentonite (AT-GMB) matrix have been carried out. The 20% loaded TPA on AT-GMB showed the highest catalytic activity. The conversions of different alcohols into the corresponding esters decrease in the following order: n-butanol> sec-butanol> ter-butanol. The selectivities for the corresponding esters are nearly 100%. The catalysts were characterized by surface area, thermal analysis, XRD and FTIR spectroscopy. The reusability study shows that the catalysts are stable and active.
Research highlights ► Heteropoly acids supported on modified Bentonite effectively catalyse esterification. ► The dodecatungstophosphoric acid containing catalysts showed the highest efficacy. ► High surface area and acid sites of the catalysts influence the catalytic activities. ► The catalysts can be regenerated and reused for several runs.
Activated clay supported heteropoly acid catalysts for esterification of acetic acid with butanol
Abstract The esterification of acetic acid with primary (n-), secondary (sec-) and tertiary (ter-) butanol catalyzed by supported heteropoly acids (HPAs), such as dodecatungstophosphoric acid (TPA), dodecatungstosilicic acid (TSA) and dodecamolybdophosphoric acid (MPA) on acid activated Bentonite (AT-GMB) matrix have been carried out. The 20% loaded TPA on AT-GMB showed the highest catalytic activity. The conversions of different alcohols into the corresponding esters decrease in the following order: n-butanol> sec-butanol> ter-butanol. The selectivities for the corresponding esters are nearly 100%. The catalysts were characterized by surface area, thermal analysis, XRD and FTIR spectroscopy. The reusability study shows that the catalysts are stable and active.
Research highlights ► Heteropoly acids supported on modified Bentonite effectively catalyse esterification. ► The dodecatungstophosphoric acid containing catalysts showed the highest efficacy. ► High surface area and acid sites of the catalysts influence the catalytic activities. ► The catalysts can be regenerated and reused for several runs.
Activated clay supported heteropoly acid catalysts for esterification of acetic acid with butanol
Bhorodwaj, Siddhartha Kumar (author) / Dutta, Dipak Kumar (author)
Applied Clay Science ; 53 ; 347-352
2011-01-17
6 pages
Article (Journal)
Electronic Resource
English
Activated clay supported heteropoly acid catalysts for esterification of acetic acid with butanol
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