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Esterification de l'acide dichloro 2.4 phenoxyacetique role et interet des resines echangeuses d'ions
Author(s) -
Luna M. Hernandez,
Alcaraz J.,
Gilot B.,
Jayles C.
Publication year - 1985
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.5450630616
Subject(s) - ion exchange resin , acetic acid , catalysis , chemistry , ion exchange , toluene , alcohol , polymer chemistry , organic chemistry , ion
The esterification of the dichloro 2,4 phenoxy‐acetic acid occurs slowly without any catalyst. The reaction is of order 2 or 1, with respect to the acid or acohol, respectively. In the presence of an acid catalyst (acid toluene sulphonate —ion‐exchange resin), the reaction is quicker; it is of order 1 with respect to the organic acid and I with respect to the alcohol. The variation of the velocity constant recalls to mind that the mechanism is more complex, in spite of the simple representation. The ion‐exchange resins play an interesting role, because they enable to avoid a separation and they are not corrosive. It is shown, however, that the penetration into the resin is limited, even when a macroporous resin is used.