Results 121 to 130 of about 91,381 (225)
Prehydrolysis soda pulping of Enset fiber for production of dissolving grade pulp and biogas. [PDF]
RSC Adv, 2023 Lemma HB +4 more
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Bleaching of soda pulp from rapeseed straw
, 2018 Cílem této disertační práce bylo vybělit natronovou buničinu ze slámy řepky olejky. První část této disertační práce je zaměřena na uvaření natronové buničiny ze slámy řepky olejky na požadovaný stupeň delignifikace.
Říhová, Martina
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Separate bleaching of pulp fractions enriched in earlywood and latewood fibers
, 2007 Unbleached softwood kraft pulp was fractionated in hydrocyclones into a fine fraction, enriched in earlywood fibers, and a coarse fraction, enriched in latewood fibers.
Tubek-Lindblom, Anna +4 more
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Oxidation of Carbohydrate and Lignin During ECF Bleaching Process
JAPAN TAPPI JOURNAL, 2003 The dependency of carbohydrate degradation on the oxidation of lignin during ECF bleaching is reviewed based on the results mainly obtained in Wood Chemistry Laboratory. The University of Tokyo.The progress of lignin oxidation during oxygen bleaching can be separated into three clearly distinguished phases. Oxidation of the first phase is mainly due to
openaire +2 more sources
, 2009 The factors contributing to the differences between chlorine dioxide and hydrogen peroxide final ECF bleaching stages are discussed with respect to the properties of Eucalyptus globulus kraft pulps.
Loureiro, P.E.G. +7 more
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Effect of enzymatic treatment on Eucalyptus globulus vessels passivation. [PDF]
Sci Rep, 2023 Vaz Á +7 more
europepmc +1 more source
Improvement of Effluent Qualities with ECF Bleaching and Next Challenges
JAPAN TAPPI JOURNAL, 2009 2007年度末には，国内で生産される漂白クラフトパルプの90％近くがECF（Elemental Chlorine Free）漂白によって製造されるようになった。本報告では，漂白工程をECFに転換した17工場の23漂白工程について，漂白工程水と総合排水の有機塩素化合物の濃度レベルの変化を調査した結果の概要をとりまとめた。ECF漂白への転換は，漂白パルプ工場からの有機塩素化合物（クロロホルム，クロロフェノール類，ダイオキシン類）の排出量を著しく減少させ，問題を指摘されるレベルではなくなった。排水中の全有機塩素化合物を示すAOXは，ECF漂白への転換によって80％減少した。しかし二酸化塩素漂白では微量ながらAOXが生成する。一方，二酸化塩素漂白の工程水には高濃度のクロレートが含まれ ...
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Industrial Hemp as a Potential Nonwood Source of Fibres for European Industrial-Scale Papermaking-A Review. [PDF]
Materials (Basel), 2023 Danielewicz D.
europepmc +1 more source
Scale Deposit Problems and their Control in ECF Bleach Plants.
JAPAN TAPPI JOURNAL, 2002 Technologies of kraft pulp bleaching have been greatly developed in recent years because of environmental consideration. New ways of bleaching are ECF and TCF bleaching. ECF bleaching does not use both elemental chlorine and hypo chloride, and TCF bleaching does not use chlorine compounds at all.
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Effluent Loads From Different ECF Bleaching Sequences Used In Hardwood Kraft Pulp Bleaching
Current World Environment, 2006 Effluent loads from different traditional and emerging ECF bleaching sequences were investigated. Oxygen delignified Eucalyptus camaldulensis and Acacia mangium kraft pulps having similar kappa number, ca 12.0 were used in this study. Different ECF bleaching sequences were compared with reference sequence, D 0 EopD 1 in terms of effluent load, such as ...
openaire +1 more source