01632nas a2200145   4500008004100000245012800041210006900169260000800238300001400246490000700260520103800267100002801305700002201333856013101355       2017                        eng d00affects of cations, anions and H+ concentration of acidic ionic liquids on the valorization of polysaccharides into furfural0 affects of cations anions and H concentration of acidic ionic liq  cJUL  a6137-61440 v413 aThe valorization of hemicellulose into valuable chemicals, such as C5 sugars and furfural, in a one-pot fashion is crucial. In this work, acidic ionic liquids in the presence of water showed high yields of C5 sugars (>80%) with >99% conversion of hemicelluloses at 160 degrees C. With a water + toluene biphasic solvent system, within 4 h, an 85% furfural yield was obtained directly from hemicellulose in a one-pot fashion using a catalytic amount of 1-methyl-3-(3-sulfopropyl)-imidazolium hydrogen sulfate. It was seen that Bronsted acidic ionic liquids (BAILs) perform better than solid acid [Faujasite and Mordenite zeolites; ion exchange resin, Amberlyst-15] and mineral catalysts [HCl and H2SO4]. The higher activity of BAILs compared to solid acids and mineral acids was correlated to the Hammett acidity function (Ho) and ion-dipole type of interactions. The catalysts were characterized using NMR (H-1 and C-13), elemental analysis and TGA to confirm that they were stable under reaction conditions and were thus recyclable.1 aMatsagar, Babasaheb, M.1 aDhepe, Paresh, L.  uhttps://library.ncl.res.in/content/ffects-cations-anions-and-h-concentration-acidic-ionic-liquids-valorization-polysaccharides