Abstract
Phthalate esters are used as plasticisers, solvents and perfumery compounds. Usually homogenous polluting and corrosive acids are used as catalysts for esterification which leave traces of inorganic impurities in the final product and they also impart coloration. This paper evaluates the activities of acid treated clays and ion exchange resins in the esterification of phthalic anhydride using methanol as the model alcohol.
The effects of various parameters with Amberlyst-36 were studied to find that the reaction was intrinsically kinetically controlled. It was observed that the catalyst chosen had excellent reusability and was not deactivated. A kinetic model was developed from the experimental data. Phthalate esters of ethanol, n-propanol and n-butanol were also synthesized.
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Acknowledgement
Thanks are due to the following for their support in carrying out research described in this paper: University Grants Commission, for Senior Research Fellowship to MSMMR, AICTE and Darbari Seth Endowments to GDY. Thanks are also due to the Michigan State University for hosting GDY as the Johansen-Crosby Visiting Professor of Chemical Engineering during 2001–2002 which provided excellent atmosphere for creative pursuits.
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Yadav, G.D., Rahuman, M.S.M.M. Activities of clays and ion exchange resins in the synthesis of phthalate esters. Clean Techn Environ Policy 6, 114–119 (2004). https://doi.org/10.1007/s10098-003-0217-8
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DOI: https://doi.org/10.1007/s10098-003-0217-8