廉价离子液体体系中玉米芯生成糠醛优化

采用廉价绿色离子液体TEA]HSO4]作为溶剂,利用微波加热法辅助玉米芯水解并脱水制备糠醛.通过响应面法优化糠醛生成反应条件,有效转换玉米芯中的木糖,并得到82.2％糠醛收率.利用2-丁醇作为萃取剂对糠醛进行回收.重复4次萃取实验,从TEA]HSO4]中回收99.7％糠醛.在2次TEA]HSO4]的回收实验...

Optimization on the Production of Furfural from Corncob in Cheap Ionic Liquid System

A cheap green ionic liquid triethylammonium hydrogen sulfateTEA]HSO₄]was applied as solvent to prepare furfural by microwave heating assisted hydrolysis and dehydration of corncob.The reaction conditions of furfural formation are optimized by the response surface method(RSM),and the total pentose in corncob is effectively converted to obtain 82.2% of furfural.2-Butanol is used as the extractant to recover furfural.After 4 repeated extraction experiments,99.7% of furfural is effectively recovered fromTEA]HSO₄].In the recovery experiment ofTEA]HSO₄],58.3% and 63.2% ofTEA]HSO₄]are recycled after the firstTEA]HSO₄]repeated experiment and the secondTEA]HSO₄]repeated experiment,respectively.The results of the first and second recycling experiments inTEA]HSO₄]show that the yield of 5-hydroxymethylfulfural(HMF)does not decrease significantly,while the yield of furfural decreases from 82.2% to 52.2% and 41.3%,respectively.This experiment provides a new idea for the efficient production of furfural in corncob by catalytic conversion in cheap and green ionic liquid system.