DONG Chaoqi, GENG Yanlou, AN Hualiang, et al. Etherification of glycerol with methanol catalyzed by SO3H-functioned ionic liquids[J]. CIESC Journal, 2013, (6): 2086-2091. DOI: 10.3969/j.issn.0438-1157.2013.06.026.
DONG Chaoqi, GENG Yanlou, AN Hualiang, et al. Etherification of glycerol with methanol catalyzed by SO3H-functioned ionic liquids[J]. CIESC Journal, 2013, (6): 2086-2091. DOI: 10.3969/j.issn.0438-1157.2013.06.026.DOI:
The catalytic performance of some SO3H-functionalized ionic liquids ([HSO3-bmim]CF3SO3
[HSO3-bmim]P-TSA
[HSO3-bmim]HSO4 and [HSO3-bmim]H2PO4) in the etherification of glycerol with methanol was evaluated
and the results showed that the catalytic performance of the ionic liquids correlated well with their acid strength.[HSO3-bmim]CF3SO3 had the highest acid strength and showed the best catalytic performance.Under the suitable reaction conditions of mass ratio of [HSO3-bmim]CF3SO3 to glycerol 0.5:1
molar ratio of methanol to glycerol 8:1
reaction temperature 190℃ and reaction time 8 h
conversion of glycerol was 84.5%
selectivity to methyl glycerol ethers and total selectivity to both dimethyl glycerol ethers and trimethyl glycerol ethers were 41.4% and 34.1%
respectively.In addition
the reaction mechanism for etherification of glycerol with methanol in the presence of[HSO3-bmim]CF3SO3 was proposed.