Thermal treatments of solid mixtures of inulin and citric acid result in th
e formation of di-D-fructose dianhydrides and oligomers derived therefrom.
The kinetics of formation of these compounds have been investigated and sim
ulated in computer studies. A mechanism is proposed. The conditions used in
this study were analogous to the conditions pertaining to the roasting of
chicory, during which similar compounds are formed.