Dissolution and recovery of cellulose from 1-butyl-3-methylimidazolium chloride in presence of water

► Temperature affects cellulose structure after dissolution in [bmIm][Cl]. ► At 90 °C, [bmIm][Cl] and its mixtures with water are non-derivatizing solvents. ► At 120 °C, [bmIm][Cl] and its mixtures with water are derivatizing solvents. ► Regenerated cellulose has cellulose II structure at T = 120 °C and t = 10 h. ► Regenerated cellulose has high amorphous content at T < 120 °C or t < 10 h.