Citation:
YI Feng-Ping, SUN Hai-Yang. Synthesis of Cyanophyll with Sulfonic Acidic Ionic Liquid as Catalyst[J]. Chinese Journal of Applied Chemistry,
;2010, 27(7): 860-862.
doi:
10.3724/SP.J.1095.2010.90633
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Cyanophyll was prepared from the reaction of acetal with benzyl alcohol in the presence of sulfonic acidic ionic liquid 1-(4-sulfonic group) butyl-3-methylimidazole tetrafluoroborate([4-sulfbmim] [BF4]) as acidic catalyst. At reaction temperature 20℃,the reaction conditions were optimized by orthogonal experiments as follows,molar ratio of benzyl alcohol and acetal is 1 to 8,reaction time 60 min,amount of catalyst 4 g based on benzyl alcohol. The yield of cyanophyll could be 92.2%. The acidic ionic liquid[4-sulfbmim] [BF4]had better catalytic effect compared with H2SO4 even if it is a little weaker in activity,and it could be reused for 6 times without losing of the catalytic activity.
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