离子液体介导玉米秸秆制备5-羟甲基糠醛

Preparation of 5-hydroxymethylfurfural from corn stover mediated by ionic liquids

以玉米秸秆为原料,采用离子液体([BMIM]Cl)与二甲基亚砜(DMSO)为溶剂,氯化铬和浓硫酸为催化剂制备5-羟甲基糠醛(5-HMF)。通过考察反应时间、温度、催化剂加入量和固液比等条件,以获得制备5-HMF的最优反应条件,反应产物由高效液相色谱分析。结果表明:酸解后的秸秆,在150℃、固液比为3.8%、m([BMIM]Cl)/m(DMSO)=1、硫酸和氯化铬的质量分数分别6.7%和13.3%(相对于秸秆)的条件下反应80 min时,5-HMF产率较高,为53.3%。

We prepared 5-hydroxymethylfurfural （5-HMF ） from corn stover in a mixed solvent of ionic liquid 1-butyl-3-methylimidazolium chloride （ [BMIM ]Cl） and dimethyl sulfoxide （DMSO） with CrCl3＋ 6H2O and sulfuric acid as catalyst. We optimized reaction conditions,including reaction time, temperature,amount of catalysts,the ratio of solid to liquid and the mass ratio of [BMIM ]Cl） to DMSO. Products were determined by high performance liquid chromatography.Yield of 5- HMF reached 53. 3 % when acidolysis of corn stover was at 150 ,with solid-liquid ratio of 3.8 %, m （[BMIM ]Cl）/ m（ DMSO） = 1, H2S04 loading of 6. 7 % and CrCl3 - 6 H 2 0 loading of 13. 3%,and reaction time of 80 min.