从玉米秸秆水解液中分离木质素并定量回收离子液体。
Separation of Lignin from Corn Stover Hydrolysate with Quantitative Recovery of Ionic Liquid.
作者信息
Underkofler Kaylee A, Teixeira Rodrigo E, Pietsch Stephen A, Knapp Kurtis G, Raines Ronald T
机构信息
Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, USA ; DOE Great Lakes Bioenergy Research Center, Wisconsin Energy Institute, 1552 University Avenue, Madison, Wisconsin 53726, USA.
Hyrax Energy, Inc., 3475-N Edison Way, Menlo Park, CA 94025, USA.
出版信息
ACS Sustain Chem Eng. 2015 Apr 6;3(4):606-613. doi: 10.1021/sc500731c.
Abstract
Abundant lignocellulosic biomass could become a source of sugars and lignin, potential feedstocks for the now emergent bio-renewable economy. The production and conversion of sugars from biomass have been well-studied, but far less is known about the production of lignin that is amenable to valorization. Here we report the isolation of lignin generated from the hydrolysis of biomass dissolved in the ionic liquid 1-butyl-3-methylimidazolium chloride. We show that lignin can be isolated from the hydrolysate slurry by simple filtration or centrifugation, and that the ionic liquid can be recovered quantitatively by a straightforward wash with water. The isolated lignin is not only free from ionic liquid, but also lacks cellulosic residues and is substantially depolymerized, making it a promising feedstock for valorization by conversion into fuels and chemicals.
摘要
丰富的木质纤维素生物质可成为糖和木质素的来源，是新兴生物可再生经济的潜在原料。生物质中糖的生产和转化已得到充分研究，但对于适合增值利用的木质素的生产了解较少。在此，我们报告了从溶解于离子液体1-丁基-3-甲基咪唑氯盐中的生物质水解产生的木质素的分离。我们表明，通过简单过滤或离心可从水解产物浆液中分离出木质素，并且通过直接用水洗涤可定量回收离子液体。分离出的木质素不仅不含离子液体，而且没有纤维素残留物且基本解聚，使其成为通过转化为燃料和化学品进行增值利用的有前景的原料。
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