The equilibrium constants of potential side reactions (intramolecular dehy- dration of 1-butanol to 1-butene, isomerization of 1-butene to cis-2-butene and trans-2-butene, olefins hydration to 2- butanol and 1-(1methylpropoxy) butane formation from the reaction between 1-butanol and the olefins) were also deter- mined.