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首页> 外文期刊>Journal of Wood Chemistry and Technology >SUSTAINABLE PRODUCTION OF LEVULINIC ACID FROM THE CELLULOSIC FRACTION OF PINUS PINASTER WOOD: OPERATION IN AQUEOUS MEDIA UNDER MICROWAVE IRRADIATION
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SUSTAINABLE PRODUCTION OF LEVULINIC ACID FROM THE CELLULOSIC FRACTION OF PINUS PINASTER WOOD: OPERATION IN AQUEOUS MEDIA UNDER MICROWAVE IRRADIATION

机译：樟子松木质成分的纤维素组分可持续生产叶绿素酸：在微波辐照下在水性介质中的操作

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The fractionation of the structural components of lignocellulosic biomass (cellulose, hemicel-luloses, and lignin) and the separate utilization of the resulting fractions for specific purposes, according to the philosophy of biorefineries, enables the development of sustainable processes for biomass utilization. In this work, Pinus pinaster wood was subjected to aqueous processing to remove water-soluble extractives and hemicelluloses, and the resulting solid was subjected to pulping with HCl-catalyzed acetic acid solutions (Acetosolv method). The pulp was employed as a substrate for levulinic acid manufacture by reaction in acidic media under microwave irradiation. The effects of the major operational variables (temperature, reaction time, and acid concentration) on the levulinic acid yield were established by statistical modeling of experimental data. Operating under the best reaction conditions (at 191.2 degrees C for 18.9 min in aqueous media containing 1.10% HCl), the levulinic acid yield accounted for 56.4% of the stoichiometric value.
机译：根据生物精炼厂的理念，木质纤维素生物质（纤维素，半纤维素-木质素和木质素）的结构成分的分级分离以及所得级分的单独利用根据生物精炼厂的理念，能够开发可持续的生物质利用过程。在这项工作中，对樟子松木材进行水处理以除去水溶性提取物和半纤维素，并且将所得固体用HCl催化的乙酸溶液进行制浆（乙酰溶剂法）。通过在微波辐射下在酸性介质中反应，将该纸浆用作制造乙酰丙酸的底物。通过实验数据的统计模型确定了主要操作变量（温度，反应时间和酸浓度）对乙酰丙酸收率的影响。在最佳反应条件下操作（在191.2摄氏度下于含有1.10％HCl的水性介质中运行18.9分钟），乙酰丙酸收率占化学计量值的56.4％。

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