Results 151 to 160 of about 588 (182)

Xylanase-Resistant Xylan In Unbleached Kraft Pulp

Journal of Wood Chemistry and Technology, 1996
ABSTRACT A water-soluble chromophoric xylanase-resitant xylan fraction (LF-D) was separated from a hardwood unbleached kraft pulp (UKP) after hydrolysis with a cellulase/ xylanase-membrane bioreactor. LF-D contained over 70% unremovable inorganic atoms including Si, Na, and S, together with a β-1,4- linked xylan.
Takashi Watanabe, Keigo Mikame, Yoichi Honda, Masaaki Kuwahara   +3 more
openaire   +1 more source

Production of microfibrillated cellulose from unbleached kraft pulp of Kenaf and Scotch Pine and its effect on the properties of hardwood kraft: microfibrillated cellulose paper

Cellulose, 2013
This work investigated the effect of using Kenaf bast fibre kraft pulps compared to Scotch Pine kraft pulps for producing microfibrillated cellulose (MFC) and its employment for improving mechanical and physical properties of handsheets made from ...
Blademo, A., Afra, Elyas,, Lindström, Tom,, Naderi, A., Rezayati Charani, Pejman Rezayati,, Charani, P. Rezayati, Dehghani-Firouzabadi, Mohammadreza,, Afra, E., Dehghani-Firouzabadi, M., Naderi, Ali,, Blademo, Åsa,   +10 more
exaly   +2 more sources

Modeling kraft cooking kinetics of fiber mixes from TMP and unbleached kraft pulps for assessment of old corrugated cardboard delignification

Holzforschung, 2018
Kraft cooking kinetics of three different lignocellulosic substrates have been investigated, namely fibers from unbleached kraft pulp (UBKP from Pinus radiata), fibers from softwood unbleached thermomechanical pulp (TMP), and wood chips for TMP ...
Gérard Mortha, Nathalie Marlin
exaly   +2 more sources

Delignification of an unbleached hardwood kraft pulp by Phanerochaete chrysosporium

Applied Microbiology and Biotechnology, 1987
Culture conditions affecting lignin degradation of an unbleached hardwood kraft pulp by Phanerochaete chrysosporium have been examined. Optimum pH and temperature for lignin degradation (about 33%) were 3.5 and 38°C, respectively. Optimum fungal growth was at a pH of 4.5 and a temperature of around 32°C.
Ai V. Tran, Robert P. Chambers
openaire   +1 more source

Partial delignification of unbleached kraft pulp with ligninolytic fungi

Biotechnology Letters, 1979
Unbleached kraft pulp is partially delignified on incubation under specified conditions with ligninolytic fungi, thereby decreasing requirements for bleaching chemicals. Studies withPhanerochaete chrysosporium demonstrated important effects of nutrient nitrogen and molecular oxygen concentrations. Possible approaches to rate enhancement are suggested.
T. Kent Kirk, H. H. Yang
openaire   +1 more source

Use of Xylanase and Rabinofuranosidase for Arabinose Removal from Unbleached Kraft Pulp

Biotechnology Letters, 2005
Preparations of arabinofuranosidase and xylanase, respectively from Aureobasidium pullulans and Trichoderma longibrachiatum, were used to remove selectively xylose and arabinose from kraft pulp. The equilibrium moisture content of pulps treated with both enzymes, at varying relative humidities, revealed a consistently lower percent moisture content at ...
H P, Makkonen, J P, Nakas
openaire   +2 more sources

UASB performance for bleached and unbleached kraft pulp synthetic wastewater treatment

Chemosphere, 2005
This paper presents the performance of two bench scale Upflow Anaerobic Sludge Blanket reactors (UASB) used for the treatment of synthetic substrates that simulate bleached and unbleached cellulose pulp plant wastewaters. The control reactor was fed with diluted black liquor and the treatment reactor with the same substrate plus a mixture of ...
A P, Buzzini, E P, Gianotti, E C, Pires
openaire   +2 more sources

Sulfur makeup in an unbleached kraft pulp mill

TAPPI Journal
Sodium sesquisulfate or “sesqui” (Na3H(SO4)2) is a by-product of chlorine dioxide production at kraft pulp mills. It is typically used for sodium and sulfur makeup in the liquor loop. Mondi Hinton Inc. (MHI) in Hinton, AB, Canada, was converting from bleached to unbleached kraft pulp production and was thus losing this source of makeup. The only option
MEHUL BIPIN CHAUHAN, THOMAS PENNER, THEODORE RADIOTIS, MICHAEL PALEOLOGOU   +3 more
openaire   +1 more source

Study on Alkali-Accessible Chromophores from Unbleached Kraft Pulp

Holzforschung, 2001
Summary An approach to a chromophore composition study using the direct size-exclusion chromatography (SEC-UV) analysis of an alkaline extract of pulp fibre walls is described. Absorbance in the 290–405 nm range of 2% and 18% NaOH extract from unbleached pulps obtained by conventional and extended kraft delignification of black alder wood ...
T. Bikova, V. Klevinska, T. Eremeeva, A. Treimanis   +3 more
openaire   +1 more source

Surface Characterization of Unbleached and Oxygen Delignified Kraft Pulp Fibers

Journal of Wood Chemistry and Technology, 2003
The chemical and morphological surface properties of different unbleached and oxygen delignified softwood kraft pulp fibers were evaluated by using different ESCA and SEM techniques. The results of the different techniques have revealed that the surface of unbleached and oxygen delignified kraft pulp fibers has a higher content of lignin and in some ...
Magnus Paulsson, Anette Heijnesson Hultén   +1 more
openaire   +1 more source