Abstract

In the present work, a kinetic study and optimization of the process of spruce wood peroxide oxidation in “acetic acid–water” medium in the presence of suspended TiO₂ catalyst at temperatures 70–100 °C were accomplished for the first time. The effect of wood species and organic solvent nature on the features of the processes of catalytic peroxide fractionation of wood biomass on microcrystalline cellulose and soluble organic products from lignin and hemicelluloses is described. Solid products of wood peroxide oxidation were characterized by FTIR, XRD, SEM, solid state ¹³C CP-MAS NMR and soluble products were identified by GC–MS. The experimental optimization of the process of birch wood oxidation by oxygen in “water–alkaline” medium in the presence of suspended Cu(OH)₂ catalyst was carried out at temperature range 160–180 °C. The scheme of biorefinery of birch wood, based on catalytic oxidative fractionation of wood biomass with the production of pentosans, vanillin, syringaldehyde and levulinic acid was developed. The resulting products are in demand in many areas, including food, pharmaceutical, chemical, cosmetic industries, synthesis of new functional and biodegradable polymers.

中文翻译：

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木材绿色生物精炼的多相催化氧化工艺动力学研究与优化

摘要

在目前的工作中，首次完成了在70–100°C的温度下，在悬浮有TiO ₂催化剂的情况下，在“乙酸-水”介质中对云杉木过氧化物的氧化过程进行动力学研究和优化的过程。描述了木材种类和有机溶剂性质对木质生物质在微晶纤维素和木质素和半纤维素的可溶性有机产物上的催化过氧化物分馏过程特征的影响。FTIR，XRD，SEM，固态¹³ C CP-MAS NMR表征了木质过氧化物氧化的固体产物，GC-MS鉴定了可溶性产物。悬浮Cu（OH）₂存在下“水-碱性”介质中桦木木材被氧气氧化过程的实验优化催化剂在160–180°C的温度范围内进行。提出了以木材生物量的催化氧化分馏，戊聚糖，香兰素，丁香醛和乙酰丙酸的生产为基础的桦木生物精制方案。在许多领域，包括食品，制药，化学，化妆品工业，合成新的功能性和可生物降解的聚合物，都需要这种产品。