以被离子液体1-丁基-3-甲基咪唑乙酸盐(BmimAc)预处理的竹粉为原料,在水/甲基异丁基酮(MIBK)双相体系中微波加热下制备糠醛(FF)和5-羟甲基糠醛(HMF)。考察了8种金属盐(ZnCl₂、FeCl₂、SnCl₂、CrCl₃、FeCl₃、AlCl₃、Fe₂(SO₄)₃、Al₂(SO₄)₃)的催化活性,并将催化活性最强的金属盐(MS)负载到凹凸棒土(ATP)上获得固体酸催化剂,对制备的固体酸催化剂进行表征并评估其催化性能。结果表明,在相同反应条件下FeCl₃的催化活性最高,FF和HMF的产率分别达到78.96%和35.04%;与ATP相比,经FeCl₃和H₂SO₄共同改性后获得的ATP-S-Fe固体催化剂的比表面积、孔径以及酸强度都发生了不同程度的增大;在相同反应条件下,ATP-S和ATP-S-Fe的催化活性相当,且均稍弱于1% H₂SO₄。

Furfural (FF) and 5-hydroxymethyl furfural (HMF) are prepared from bamboo powder pretreated with 1-butyl-3-methylimidazole acetate (BmimAc) ionic liquid under microwave heating in water/methyl isobutyl ketone (MIBK) two-phase medium.The catalytic activities of eight kinds of metal salts,including ZnCl₂,FeCl₂,SnCl₂,CrCl₃,FeCl₃,AlCl₃,Fe₂(SO₄)₃,and Al₂(SO₄)₃,are compared and evaluated.The metal salt with the strongest catalytic activity is loaded onto attapulgite (ATP) to obtain a solid acidic catalyst,which is then characterized and its catalytic performance is evaluated.It is shown that the highest yields of FF (78.96%) and HMF (35.04%) are obtained when FeCl₃ is used as the catalyst under the same reaction conditions.Compared with ATP,the specific surface area,pore size,and acidic strength of ATP-S-Fe obtained through modification of ATP by FeCl₃ and H₂SO₄ together increase.Under the same reaction conditions,the catalytic activities of ATP-S and ATP-S-Fe are almost equivalent,and both slightly weaker than that of 1 wt% H₂SO₄.

毕浩然(1997-),男,硕士生,研究方向为木质纤维生物质资源的高值化利用,764343322@qq.com