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Resination and decarboxylation reactions in fusion synthesis of ca‐resinates
Author(s) -
Sundqvist Satu,
Paatero Erkki,
Tenhola Harri
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.5450770305
Subject(s) - decarboxylation , rosin , chemistry , kinetics , reaction rate , chemical kinetics , kinetic energy , titration , rate equation , resin acid , organic chemistry , catalysis , physics , quantum mechanics
The reaction steps in fusion synthesis of Ca‐resinates include a fast, irreversible resination reaction and a slow decarboxylation of rosin acids. The kinetics of the reactions was studied separately in a laboratory scale batch reactor. The kinetic data were obtained by acid number titrations and FTIR measurements. Resination was observed to be a fast irreversible reaction in the temperature range 190 to 235°C. Rate equations for the decarboxylation reaction were derived based on plausible mechanistic reaction steps of free and solvating rosin acids. The parameters of the rate equations were estimated for syntheses at different reaction temperatures (265 to 285°C) and the kinetic model was successfully applied to predict the experimental kinetics of rosin acid decarboxylation.