One-step fractionation of the main components of bamboo by formic acid-based organosolv process under pressure

Yongchao Zhang, Qingxi Hou, Fu Yingjuan, Chunlin Xu, Annika Smeds, Stefan Willför, Yongchao Zhang, Li Zongquan, Menghua Qin

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To promote the efficient utilization of lignocellulosic materials, one-step fractionation by formic acid-based organosolv process under pressure has been studied for converting lignocellulose in its main components. Lignin and hemicelluloses were selectively dissolved, while cellulose was not obviously degraded. Under optimized conditions (85% formic acid, a liquor-to-solid ratio of 7:1, and a temperature of 145 degrees C for 45min), this process provided a high efficient way to separate the main components of bamboo, obtaining 42.2% cellulose pulp, 31.5% lignin, 8.5% hemicellulose-rich fraction, 3.56% furfural and 3.80% acetic acid. Cellulose pulp with satisfying viscosity could easily be bleached to a high brightness of over 87% ISO with a short bleaching sequence, and had an acceptable paper strength properties. The recovered lignin fraction contained a small amount of carbohydrates and a considerable part of proteins and p-hydroxycinnamates. Additionally, the organic substances in hemicellulose-rich fraction obtained was composed of 95% carbohydrates, most of which was monosaccharides, as well as 5% lignin.
Original languageUndefined/Unknown
Pages (from-to)170–182
Number of pages13
JournalJournal of Wood Chemistry and Technology
Issue number3
Publication statusPublished - 2018
MoE publication typeA1 Journal article-refereed


  • Bamboo
  • cellulose pulp
  • formic acid fractionation

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