Abstract

Experiments and calculations are used to determine the optimum parameters of the peroxide delignification of larch wood in the presence of MnSO₄ catalyst that provides high yields of cellulose (44.3 wt %) with low residual lignin contents at a temperature of 100°C, an H₂O₂ content of 6 wt %, a CH₃COOH content of 25 wt %, a LWR of 15, and a duration of 3 h The cellulose obtained under optimum conditions has a chemical composition of cellulose, 92.7 wt %; lignin, 0.6 wt %; and hemicellulose, 5.7 wt %. IRS and X-ray diffraction are used to determine that cellulose obtained from larch wood has a structure similar to that of industrial microcrystalline cellulose. The proposed catalytic approach allows cellulose to be obtained from larch wood with a minimal lignin content under mild conditions in one step and with a high yield, a degree of crystallinity of 0.8, and a crystallite size of 3.0 nm.

中文翻译：

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MnSO 4催化下落叶松木过氧化物脱木素的实验和数学优化

摘要

实验和计算用于确定在MnSO ₄催化剂存在下落叶松木过氧化物脱木质素的最佳参数，该催化剂可在100°C的高温下提供高收率的纤维素（44.3 wt％）和低残留木质素含量₂ O ₂含量为6 wt％，CH ₃COOH含量为25 wt％，LWR为15，持续时间为3 h。在最佳条件下获得的纤维素具有92.7 wt％的纤维素化学组成；木质素，0.6重量％；半纤维素为5.7重量％。使用IRS和X射线衍射确定从落叶松木材中获得的纤维素具有与工业微晶纤维素相似的结构。所提出的催化方法允许在温和条件下一步一步从落叶松木材中获得具有最小木质素含量的纤维素，并且产率高，结晶度为0.8，微晶尺寸为3.0 nm。