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Esterification of ethenyl benzene and its derivatives with acetic acid in the presence of perchloric acid as a catalyst
Author(s) -
Martínez de la Cuesta Pedro J.,
Martínez Eloísa Rus,
Palomino Pérez Fuensanta I.,
Sarria Francisca Romero
Publication year - 1999
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450770613
Subject(s) - perchloric acid , acetic acid , benzene , catalysis , chemistry , organic chemistry , medicinal chemistry
The esterification process of ethenyl benzene and its derivative compounds ( p ‐methyl, p ‐methoxy, p ‐chloro, m ‐methyl, m ‐nitro and m ‐chloro, respectively) was carried out with acetic acid and using perchloric acid as a catalyst. From the effects of the variables studied it could be concluded that: the temperature and the catalyst concentration influence positively over the olefin conversion, whereas the initial olefin concentration exert no effect over the same; and that the presence of perchloric salts exerts a different influence, depending on the temperature and on the catalyst concentration. It has been proven that the substituted radicals in the m ‐ or p ‐ positions exert an important influence over the conversion of the studied olefins, presenting growing reactivity in the following order: m ‐nitro ethenyl benzene, m ‐chloro ethenyl benzene, p ‐chloro ethenyl benzene, m ‐methyl ethenyl benzene, ethenyl benzene, p ‐methyl ethenyl benzene and p ‐methoxy ethenyl benzene. Finally, a kinetic and thermodynamic study has been done and the corresponding parameters have been calculated, with an adequate fitting.