Formic acid pulping of rice straw

Lam, Hoang Quoc; Bigot, Y. Le; Delmas, M.; Avignon, et Gérard

doi:10.1016/s0926-6690(00)00089-3

Cited by 80 publications

(41 citation statements)

References 2 publications

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“…Formic acid has been revealed as a high selectivity delignification agent for wood, even at very mild conditions [25][26][27]. In a medium consisting of a mixture of formic acid, water, and small quantities of hydrochloric acid, the lignin is depolymerized, oxidized, and dissolved with most of the hemicelluloses and extractives.…”

Section: Organosolv With Formic 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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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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Section: Organosolv With Formic 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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“…The CIMV [1][2][3][4] process offers a new alternative of paper industry as it allows the separation of cellulose, lignin, and hemicelluloses that are the main components of lignocellulosic biomass.…”

Section: Introductionmentioning

confidence: 99%

Functionality of wheat straw lignin extracted in organic acid media

Delmas

Benjelloun-Mlayah

Bigot

et al. 2011

J of Applied Polymer Sci

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Wheat straw lignin was extracted by the CIMV process using organic acid media at pilot plant scale. The product was analyzed by gel permeation chromatography (GPC), 1H and 13C NMR spectroscopy, infrared attenuated total reflectance‐Fourier transform infrared analysis (ATR‐FTIR), and gas chromatography (GC) to clarify its structure and functionality. In most cases, lignin was esterified before analysis. Control of the esterification was conducted via ATR‐FTIR and NMR. GC analysis was used to quantify total hydroxyl group of lignin by saponification of propionylated lignin and was also used to quantify phenolic hydroxyl groups of lignin by aminolysis of propionylated lignin. Acetylated lignin was analyzed by GPC. Carboxylic group of lignin was determined by pH metric titration. Lignin extracted from the CIMV process was observed as a low molecular weight polymer with a low polydispersity index and high free hydroxyl content. The potential of lignin as a natural polyphenol was confirmed by the analytical results obtained. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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Formic acid pulping of rice straw

Cited by 80 publications

References 2 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

Functionality of wheat straw lignin extracted in organic acid media

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