Changes in sulfite liquor composition while re-profiling mill from paper-grade to dissolving pulp production

IF 1.7 4区农林科学 Q2 MATERIALS SCIENCE, PAPER & WOOD Journal of Wood Chemistry and Technology Pub Date : 2022-04-28 DOI:10.1080/02773813.2022.2068603

S. Magina, Inês S. F. Mendes, A. Prates, D. Evtuguin

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引用次数: 3

Abstract

Abstract The re-profiling from paper-grade to dissolving pulp production is a common trend for acid sulfite cooking of wood. This provides substantial changes in the composition of the spent sulfite liquor (SSL) affecting its potentialities in subsequent processing within the biorefinery concept. In this work, a comparative analysis of the chemical composition of SSL was performed from the magnesium-based acid sulfite cooking of Eucalyptus globulus wood to produce the paper-grade and dissolving pulps. More severe pulping conditions required for dissolving pulp production led to a substantial increase in volatile compounds in SSL, such as acetic acid, methanol, and furfural. At the same time, the amounts of dissolved sugars and lignosulfonates (LS) were increased to a less extent. The main changes detected in LS were related to the increase of its molecular weight, degree of condensation, and sulfonation degree. The increased concentration of the sulfuric acid in SSL was one of the reasons for these changes.

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从纸张级到溶解浆生产再仿形磨亚硫酸盐液成分的变化

从纸级到溶解纸浆生产的再成型是木材酸亚硫酸盐蒸煮的共同趋势。这为废亚硫酸盐液(SSL)的组成提供了实质性的变化，影响了其在生物炼制概念中后续处理的潜力。本文对蓝桉木材镁基酸亚硫酸盐蒸煮制备的纸浆和溶解纸浆的化学成分进行了比较分析。溶解纸浆生产所需的更严格的制浆条件导致SSL中挥发性化合物(如乙酸、甲醇和糠醛)的大量增加。同时，溶糖量和木质素磺酸盐(LS)的增加幅度较小。LS检测到的主要变化与分子量、缩合度和磺化度的增加有关。SSL中硫酸浓度的增加是造成这些变化的原因之一。

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来源期刊

Journal of Wood Chemistry and Technology 工程技术-材料科学：纸与木材

CiteScore

3.70

自引率

20.00%

发文量

审稿时长

3 months

期刊介绍： The Journal of Wood Chemistry and Technology (JWCT) is focused on the rapid publication of research advances in the chemistry of bio-based materials and products, including all aspects of wood-based polymers, chemicals, materials, and technology. JWCT provides an international forum for researchers and manufacturers working in wood-based biopolymers and chemicals, synthesis and characterization, as well as the chemistry of biomass conversion and utilization. JWCT primarily publishes original research papers and communications, and occasionally invited review articles and special issues. Special issues must summarize and analyze state-of-the-art developments within the field of biomass chemistry, or be in tribute to the career of a distinguished researcher. If you wish to suggest a special issue for the Journal, please email the Editor-in-Chief a detailed proposal that includes the topic, a list of potential contributors, and a time-line.