二氧化硫-乙醇-水分步提取蔗渣中的硫素平衡。
Sulfur balance of sulfur dioxide-ethanol-water fractionation of sugarcane straw.
机构信息
Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland.
Department of Forest Products Technology, Aalto University, FI-00076 Aalto, Finland; Department of Chemical and Biological Engineering, University of Maine, 5737 Jenness Hall, Orono, ME 04469-5737, USA.
出版信息
Bioresour Technol. 2017 Oct;241:998-1002. doi: 10.1016/j.biortech.2017.06.047. Epub 2017 Jun 10.
The sulfur balance of SO-ethanol-water (AVAP®) fractionation of sugarcane (SC) straw was investigated. Hydrogen sulfite and sulfite anions are nearly absent in the liquors, despite cations present in straw, whose effect is thus limited to neutralization of lignosulfonic acids decreasing the acidity. Higher degree of sulfonation was observed for dissolved straw lignin compared to wood lignin (0.8-0.9 vs. 0.25 S/C9). Sulfur dioxide amounts of 0.9-1.2, 4.1-4.3 and 44-49g per o.d.kg straw were bound to pulp, precipitated lignin and lignosulfonic acid, respectively, while the rest of SO was recovered by distillation from the spent fractionation suspensions.
研究了甘蔗渣（SC）SO-乙醇-水（AVAP®）分级过程中的硫平衡。尽管秸秆中的阳离子存在，但在蒸煮液中几乎没有亚硫酸氢盐和亚硫酸盐阴离子，因此其作用仅限于中和木质素磺酸，降低酸度。与木木质素相比，溶解的秸秆木质素的磺化程度更高（0.8-0.9 比 0.25 S/C9）。二氧化硫分别以 0.9-1.2、4.1-4.3 和 44-49g/每绝干公斤秸秆的量与纸浆、沉淀木质素和木质素磺酸结合，而其余的 SO 通过从废分级悬浮液中蒸馏回收。
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