Open AccessSynthesis of Some Aromatic and Aliphatic Esters Using WO3/ZrO2 Solid Acid Catalyst under Solvent Free Conditions
Author(s) -
Vijaya Charan Guguloth,
B. Satyanarayana
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22683
Subject(s) - catalysis , chemistry , calcination , tetragonal crystal system , monoclinic crystal system , cubic zirconia , tungsten , solvent , yield (engineering) , bet theory , phase (matter) , specific surface area , inorganic chemistry , chemical engineering , nuclear chemistry , organic chemistry , crystal structure , ceramic , materials science , metallurgy , engineering
A simple method is delineated for the synthesis of substituted ester products in superior yields by esterification reaction under solventunbound condition using tungsten upgraded ZrO2 solid acid catalyst at 353 K. The WO3/ZrO2 catalyst has been prepared by usingimpregnation method followed by calcination at 923 K over a period of 6 h in air atmosphere. SEM, XRD, FTIR, and BET surface areatechniques were used to categorize this catalyst. Zirconia has both acidic and basic possessions which can be changed by incorporatingsuitable promoter atom like tungsten which in turn increases the surface area thereby enhancing the surface acidity. Impregnation of W6+ions exhibits a strong influence on phase modification of zirconia from thermodynamically solid monoclinic to metastable tetragonalphase. Amalgamation of promoter W6+ will stabilize tetragonal phase which is active in catalyzing reactions. In esterification reactionWO3/ZrO2 catalyst was found to be stable, efficient and environmental friendly, effortlessly recovered by filtration, excellent yield ofproduct and can be reusable efficiently.