Hemicelluloses prior to aspen chemithermomechanical pulping: pre-extraction, separation, and characterization.

A portion of hemicelluloses and acetic acid can be pre-extracted with dilute sulfuric acid prior to the aspen chemithermomechanical pulp process. The streams collected from the second press-impregnation stage after acid pre-extraction contain a significant amount of acid pre-extracted hemicelluloses. Most of the total sugars obtained from the pressate were xylan, in which xylan was further hydrolyzed to sugar monomers under the acid pre-extraction condition. To fully understand the characteristics of hemicelluloses yielded prior to pulping, the pre-extracted hemicelluloses were separated and characterized by FT-IR, (1)H NMR, and thermogravimetric analysis in this study. Most of the FT-IR bonds from the hemicelluloses agreed well with the other two spectra of birch xylan and CA0050 xylan, except a new absorption at 1734 cm(-1) contributed to acetyl groups. The hemicelluloses obtained from acid pre-extraction began to decompose significantly at about 225 °C, slightly lower in comparison with organosolv and alkaline hemicelluloses reported in the literature.

[1]  Kecheng Li,et al.  Extracting hemicelluloses prior to aspen chemi-thermomechanical pulping: Effects of pre-extraction on pulp properties. , 2012, Carbohydrate polymers.

[2]  P. Fatehi,et al.  Isolation and cationization of hemicelluloses from pre-hydrolysis liquor of kraft-based dissolving pulp production process , 2011 .

[3]  R. Sun,et al.  Pretreatment of partially delignified hybrid poplar for biofuels production: Characterization of organosolv hemicelluloses , 2011 .

[4]  Zhibin He,et al.  Improvement of high-yield pulp properties by using a small amount of bleached wheat straw pulp. , 2011, Bioresource technology.

[5]  P. Fatehi,et al.  Separation of lignocellulosic materials by combined processes of pre-hydrolysis and ethanol extraction. , 2011, Bioresource technology.

[6]  J. Wen,et al.  Fractional isolation and chemical structure of hemicellulosic polymers obtained from Bambusa rigida species. , 2010, Journal of agricultural and food chemistry.

[7]  Ulrika Rova,et al.  Impact of hemicellulose pre-extraction for bioconversion on birch Kraft pulp properties. , 2010, Bioresource technology.

[8]  J. Y. Zhu,et al.  Woody biomass pretreatment for cellulosic ethanol production: Technology and energy consumption evaluation. , 2010, Bioresource technology.

[9]  J. Kennedy,et al.  Fractional isolation and structural characterization of hemicelluloses from Caragana korshinskii , 2010 .

[10]  Qiang Yang,et al.  Comparative study of SPORL and dilute-acid pretreatments of spruce for cellulosic ethanol production. , 2010, Bioresource technology.

[11]  J. Saddler,et al.  High consistency enzymatic hydrolysis of hardwood substrates. , 2009, Bioresource technology.

[12]  Gary M. Scott,et al.  Quantitative analysis of sugars in wood hydrolyzates with 1H NMR during the autohydrolysis of hardwoods. , 2009, Bioresource technology.

[13]  Ulrike W Tschirner,et al.  Pre-extraction of hemicelluloses and subsequent kraft pulping Part I: Alkaline extraction , 2008 .

[14]  Eliana Vieira Canettieri,et al.  Evaluation of the kinetics of xylose formation from dilute sulfuric acid hydrolysis of forest residues of Eucalyptus grandis , 2007 .

[15]  G. Muralikrishna,et al.  Hemicelluloses of ragi (finger millet, Eleusine coracana, Indaf-15): isolation and purification of an alkali-extractable arabinoxylan from native and malted hemicellulose B. , 2006, Journal of agricultural and food chemistry.

[16]  Y. Ni,et al.  Substitution of hardwood kraft with aspen high-yield pulp in lightweight coated wood-free papers Part I. Synergy of basestock properties , 2006 .

[17]  A. van Heiningen,et al.  Converting a kraft pulp mill into an integrated forest biorefinery. , 2006 .

[18]  Paul Fowler,et al.  Extraction and characterization of original lignin and hemicelluloses from wheat straw. , 2005, Journal of agricultural and food chemistry.

[19]  Zhou Ya-Jun.  An Overview of BCTMP:Process, Development, Pulp Quality and Utilization , 2005 .

[20]  G. Muralikrishna,et al.  Structural analysis of arabinoxylans isolated from native and malted finger millet (Eleusine coracana, ragi). , 2004, Carbohydrate research.

[21]  Paul Gatenholm,et al.  Material properties of plasticized hardwood xylans for potential application as oxygen barrier films. , 2004, Biomacromolecules.

[22]  R. Sun,et al.  Characterization of hemicelluloses isolated with tetraacetylethylenediamine activated peroxide from ultrasound irradiated and alkali pre-treated wheat straw , 2003 .

[23]  G. Zacchi,et al.  Isolation and characterization of galactoglucomannan from spruce (Picea abies) , 2002 .

[24]  A. Albertsson,et al.  Biodegradable Polymers from Renewable Sources. New Hemicellulose-Based Hydrogels , 2001 .

[25]  José Manuel Domínguez,et al.  Biotechnological production of xylitol. Part 1: Interest of xylitol and fundamentals of its biosynthesis , 1998 .

[26]  P. Gatenholm,et al.  Preparation and properties of hydrogels based on hemicellulose , 1998 .