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Silicotungstic acid supported zirconia: An effective catalyst for esterification reaction

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dc.contributor.author Parida, K.M.
dc.contributor.author Mallick, S.
dc.date.accessioned 2018-10-01T12:22:40Z
dc.date.available 2018-10-01T12:22:40Z
dc.date.issued 2007
dc.identifier.citation Journal Of Molecular Catalysis A-Chemical, 275(1-2), 2007: 77-83
dc.identifier.issn 1381-1169
dc.identifier.uri http://ore.immt.res.in/handle/2018/1291
dc.description.abstract A series of solid acid catalysts were synthesized by incipient wetness impregnation method by varying the wt% of silicotungstic acid on hydrous zirconia (ZSTA). The prepared catalysts were characterized by PXRD, FTIR, UV-vis DRS, EPMA, BET surface area, acid sites, etc. IFTIR and UV-vis DRS studies indicate that the material retain the Keggin-type structure of silicotungstic acid up to 500 degrees C. The suitability of the materials was studied for acid catalysed esterification reactions using formic, acetic, propionic, n-butyric acid and n-butyl alcohol (NBA), isobutyl alcohol (IBA) and sec-butyl alcohol (SBA). Material with 15 wt% STA on hydrous zirconia having high surface area and acid sites acts as better catalyst for esterification reactions. The esterification of acids with NBA was found to be higher than IBA and SBA. In all the cases, the selectivity for the corresponding esters is nearly 100%. The straight-line plot of -ln(1 - conversion) versus reaction time for the reactions carried out at 98 degrees C supports that the esterification reaction obeys first order kinetics with respect to acid concentration. The reusability study justifies that the catalyst is stable and active. (c) 2007 Elsevier B.V All rights reserved.
dc.language en
dc.publisher Elsevier
dc.relation.isreferencedby SCI
dc.rights Copyright [2007]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
dc.subject Chemical Sciences
dc.title Silicotungstic acid supported zirconia: An effective catalyst for esterification reaction
dc.type Journal Article
dc.affiliation.author CSIR-IMMT, Bhubaneswar 751013, Odisha, India


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