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Kinetics of lactose isomerisation to lactulose in an alkaline medium
Author(s) -
Dendene Kamel,
Guihard Laurence,
Nicolas Stéphane,
Bariou Bernard
Publication year - 1994
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280610106
Subject(s) - lactulose , lactose , isomerization , kinetics , chemistry , food science , biochemistry , catalysis , physics , quantum mechanics
The aim of this work was to determine easily and quickly the operating conditions for the industrial production of lactulose (rate of isomerisation, rate of lactose degradation, reaction time, temperature, pH). The kinetic equations of lactulose formation and lactose degradation in an alkaline medium (NaOH) were determined. Experiments were carried out at different OH − concentrations (0·5 × 10 −2 –19 × 10 −2 mol dm −3 ) and at different temperatures (328–353 K). A kinetic model is presented which can be used to describe the experimental results and hence a procedure for industrial production.