Atmospheric Acetic Acid Pulping of Rice Straw(1). Pulping conditions and properties of pulp.
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Variation of Wood Pulping and Bleached Pulp Properties Along the Stem in Mature Eucalyptus globulus Trees
The wood of a mature (40-year-old) Eucalyptus globulus Labill tree was characterized at different stem height levels (0%, 10%, 35%, and 50% of total height) regarding pulping, bleaching, and paper properties. Pulp yields increased upwards from 46% to 50%, and Kappa number decreased from 17.5 to 12.3 at 0 and 50% height, respectively. The estimated specific wood consumption ranged from 3.2 m odt...
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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 – ...
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Green liquor ( GL ) was used as a sulfide rich liquor to impregnate Southern pine wood chips in a pretreatment step for kraft pulping. A central composite experimental design was applied to investigate relationships between pretreatment conditions, chemical absorption, pulping selectivity, and primary pulp qualities. The derived equations provided a correlation between the independent cooking v...
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Several hardwood and softwood trees were analyzed for anthraquinone-type components. Wood samples were reduced to a small size and extracted with an organic solvent; the extracts were then concentrated and analyzed by gas chromatography-mass spectroscopy. Low levels of AQ and anthrone components were detected using a sensitive selected-ion monitoring technique. Ten out of seventeen hardwood sam...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1998
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.52.408