乙酰丙酸
玉米芯
化学
木糖
纤维素
甲酸
有机化学
选择性
无机化学
催化作用
核化学
原材料
发酵
作者
Jianmei Li,Zhicheng Jiang,Libin Hu,Changwei Hu
出处
期刊:Chemsuschem
[Wiley]
日期:2014-07-15
卷期号:7 (9): 2482-2488
被引量:71
标识
DOI:10.1002/cssc.201402384
摘要
Abstract Increased energy consumption and environmental concerns have driven efforts to produce chemicals from renewable biomass with high selectivity. Here, the selective conversion of cellulose in corncob residue, a process waste from the production of xylose, to levulinic acid was carried out using AlCl 3 as catalyst and NaCl as promoter by a hydrothermal method at relatively low temperature. A levulinic acid yield of 46.8 mol % was obtained, and the total selectivity to levulinic acid with formic acid was beyond 90 %. NaCl selectively promoted the dissolution of cellulose from corncob residue, and significantly improved the yield and selectivity to levulinic acid by inhibiting lactic acid formation in the subsequent dehydration process. Owing to the salt effect of NaCl, the obtained levulinic acid could be efficiently extracted to tetrahydrofuran from aqueous solution. The aqueous solution with AlCl 3 and NaCl could be recycled 4 times. Because of the limited conversion of lignin, this process allows for the production of levulinic acid with high selectivity directly from corncob residue in a simple separation process.
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