Direct dissolution of UO2 in carboxyl-functionalized ionic liquids was achieved, and the addition of Fe-containing ionic liquids would improve the dissolution kinetics.
It was shown for the first time that guanidine acrylate and methacrylate can act as ionic liquids for direct dissolution of cellulose (the solubility of dialdehyde cellulose is 27 % at the temperature of 60 °C). The conditions for the use of new ionic liquids as a dialdehyde cellulose solvent are found out: the temperature (60 °C), concentration of aqueous solution of acrylate (methacrylate) guanidine (1 mol/L).