In the present study we wanted also to explore if the
recovered copper oxide could be recycled in the vanillin plant
as solid copper (II) oxide. Thus, by using the gained
knowledge of how to oxidise LS750/LS850, a new experimental
design vary the amount of copper and sodium hydroxide was
performed in the pilot plant reactors. The experimental design
with adjacent experimental results is given in Table 8, from
which the response surface model of eq 12 was derived based
on these results.
This model was used to calculate the response surface
projection reported in Figure 8, which shows an interesting