Acetosolv delignification of Miscanthus sinensis bark

This paper deals with the chemical treatments with selected organic compounds that have been applied to Miscanthus to upgrade it, for pulp production or fractionation purposes. Organosolv processes have demonstrated their effectiveness as fractionation treatments; therefore special emphasis is placed on these systems and, in particular, those making use of carboxylic acids. That is, Acetosolv process that uses acetic acid-water-hydrochloric acid mixtures as delignifying agents, the process with formic acid-water-hydrochloric acid and the Milox process, which replaces the hydrochloric acid in the medium by hydrogen peroxide, thus forming peroxyacetic acid. Furthermore, we present the results of the characterizations that have been made in relation to extractives and lignin of Miscanthus. It also is analyzed the major changes undergone by lignin during organosolv treatments. Finally, some progresses in the field of TCF bleaching of the cellulose pulps obtained are summarized.

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“…The Acetosolv method has been applied to Miscanthus with good delignification percentages [35]. Fig.…”

Section: Organosolv With Acetic Acidmentioning

confidence: 99%

Miscanthus x giganteus as a Source Of Biobased Products Through Organosolv Fractionation: A Mini Review

Villaverde¹,

Ligero²,

Vega

2010

TOASJ

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“…Oxoacid-based method has been demonstrated to be among the most successful method which allows efficient delignification of both woody [8][9] and non-woody materials [10]. Two oxoacids have achieved particularly good delignification result: formic acid [11][12][13][14], and acetic acid [10,15]. Acetic acidolysis method is shown to be an efficient method to extract lignin with better yield and much lower content in impurities than for conventional acidolysis [16].…”

Section: Introductionmentioning

confidence: 99%

Phase behavior, interaction and properties of acetic acid lignin-containing polyurethane films coupled with aminopropyltriethoxy silane

Wang¹,

Mou²,

Ni³

et al. 2013

Express Polym. Lett.

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Abstract.A series of novel acetic acid lignin-containing polyurethane (LPU) films coupled with aminopropyltriethoxy silane (APTS) (LPUSi) or the mixture of APTS and trimethylol propane (TMP) (LPUSiT) were prepared. With 2% APTS addition, the crosslinking density increased, and the resultant films were endowed with good mechanical properties and water resistance. It was also found that the hydrogen bonding interaction between -NH and -C=O of urethane was destroyed, and new hydrogen bonds between APTS and LPU were formed. However, when APTS content was greater than 4%, significant phase aggregation were detected, resulting in poor mechanical properties and water resistance. In contrast, the crosslinking density, tensile strength and water resistance can be further improved with TMP addition at 2% APTS. The simultaneous addition of APTS and TMP was beneficial for phase mixing and the formation of uniform network. And the surface morphology of LPUSiT films became smoother and more homogeneous.

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“…Acetosolv pulping of nonwoody materials had also been exploited by other researchers. For instance, bagasse (Tu et al 2008), jute bast (Sahin and Young 2008), cardoon (Cynara cardunculus) stalks (Ligero et al 2007), bark (Ligero et al 2005), and wheat straw (Triticum vulgare CV. Horoshiri) (Pan and Sano 1999).…”

Section: Introductionmentioning

confidence: 99%

Influences of the operating variables of acetosolv pulping on pulp properties of oil palm frond fibres

Wanrosli

Mazlan

Law

et al. 2011

Maderas, Cienc. tecnol.

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The effect of acetosolv pulping variables viz. pulping time, temperature, catalyst (HCl) and acetic acid on oil palm frond fibres was investigated. The following conditions were found to be optimum to pulp frond fibres: 140 ºC, 0.5% HCl, 75% acetic acid, and 1/10 solid/liquor ratio. Under these conditions we could obtain these properties: Kappa number 13-16, zero-span tensile breaking length -83 km, sheet density -0.57 g cm -3 , tensile index -48 N m g -1 , tear index -5.4 mN m 2 g-1, brightness -16% ISO and opacity -98%. Higher values of these operating parameters would degrade the fibre characteristics such as zero-span tensile breaking length, tensile index, and sheet density.

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Acetosolv delignification of Miscanthus sinensis bark

Cited by 23 publications

References 12 publications

Miscanthus x giganteus as a Source Of Biobased Products Through Organosolv Fractionation: A Mini Review

Miscanthus x giganteus as a Source Of Biobased Products Through Organosolv Fractionation: A Mini Review

Phase behavior, interaction and properties of acetic acid lignin-containing polyurethane films coupled with aminopropyltriethoxy silane

Influences of the operating variables of acetosolv pulping on pulp properties of oil palm frond fibres

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