Regarding Keq,i, the equilibrium constant for the bimolecular dehydration of 1-butanol to DNBE (R1) is high enough to state that the reaction is shifted to the ether formation at equilibrium.
Furthermore, as it was mentioned before, the formation of 1-butene was extremely slow and the highest amount of 1-butene detected at the end of the experiments was rather low. Consequently, the amount of the other by products was also very low.
All this assures a good conversion level of 1-butanol to ether in industrial etherification processes.
Moreover, Keq,1 hardly changes with temperature, pointing out that conversion is quite promising to produce the ether in all the experimental temperature range.