Effects of xylanase on optical properties of bagasse kraft pulp in ECF bleaching [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2009 The effect of using commercial xylanase enzyme in prebleaching of bagasse kraft pulp was investigated. Xylanase enzyme from Trichoderma viride was added to pulp at various doses of 10, 25 and 50 IU/g pulp for reaction time 2h and then the enzyme treated ...
Hossein Resalti +2 more
doaj +1 more source
JAPAN TAPPI JOURNAL, 2012 パルプ漂白方法において，ECF漂白転換後，完成パルプの褪色が課題とされてきた。我々はこの褪色対策として，パルプ中に残留するヘキセンウロン酸（HexA）の除去を目的に，漂白シーケンス（a―Z／D―Eop―D）のa段にモノ過硫酸（MPS）の添加を検討した。MPS漂白の実機導入に向けて，MPSのオンサイト製造が問題となった。これまでにMPSオンサイト製造例は報告されていなかったが，三菱ガス化学（株）との共同研究の末，硫酸と過酸化水素を高濃度で使用し，実験室レベルと同等のMPS収率を実機レベルで得ることが可能となった。MPS処理段（Px段）の実機導入開始以降は，HexA量の低減が確認され，パルプの褪色程度を示す過マンガン酸カリウム価（K価）も低下させることが出来た。また ...
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Effect of s/g ratio on kraft pulping and ecf bleaching of some poplars and eucalyptus [PDF]
, 2014 The effect of syringyl:guaiacyl (S/G) ratio on kraft pulping and kraft pulping followed by O-2 delignification was investigated with six poplars grown on the same site.
Francis, Raymond C. +3 more
core +7 more sources
Applicability of Microbial Xylanases in Paper Pulp Bleaching: A Review
BioResources, 2014 The pulp and paper industries are attempting to bring changes to the bleaching process to minimize the use of chlorine to satisfy regulatory and market demands. Xylanases offer a cost-effective way for mills to realize a variety of benefits in bleaching.
Avdhesh Kumar Gangwar +2 more
doaj +1 more source
Conversion to ECF Bleaching. A Comparative Study with Focus on the First Bleaching Stage.
JAPAN TAPPI JOURNAL, 2002 In the present paper, an investigation of some different ECF bleaching sequence is presented, and the results compared. Special attention is paid to the importance of the first bleaching stage after oxygen delignification, i. e. the so-called delignifying bleaching stage.
Ragnar, Martin, Leite, Marcelo Moreira
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Evaluation of chlorate emissions in connection with changes between TCF and ECF bleaching - A study at SCA Östrands pulp mill [PDF]
, 2021 SCA Massa, Östrands massafabrik har två produktionslinjer, fiberlinjen som tillverkar NBSK (blekt barrsulfatmassa) och CTMP-linjen som tillverkar CTMP (kemisk termomekanisk massa).
Granbom, Linn
core
Operational Experience of ECF Bleaching.
JAPAN TAPPI JOURNAL, 2002 Oxygen bleaching sequence, efficient washing system and reinforced effluent treatment facilities that had been introduced in Hachinohe mill of Mitsubishi Paper Mill since 1988, was allowed to reduce adsorbed organic halogen (AOX) with greatefficiency. However the global environmental demand intensely trends toward more and more reduction of emission or
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Effect of alkaline extraction in reducing the Kappa number in ECF bleaching [PDF]
, 2021 The acid hydrolysis stage (A(HT)) used in bleaching sequences of pulp, has as its main objective, the degradation of hexenuronic acids which are present in the pulp and can affect its brightness, reversal of brightness, among others.
Oliveira, Iliane Rodrigues de [UNESP] +2 more
core +1 more source
Preparation of Bleached Soda Pulp from Canola Stalks [PDF]
تحقیقات علوم چوب و کاغذ ایران, 2010 A fundamental study was carried out to explore the canola stalks properties in order to increase the use of abundant agricultural residuals in pulp and paper production.
Mohammad Molaei +3 more
doaj +1 more source
Lipophilic extractives from several nonwoody lignocellulosic crops (flax, hemp, sisal, abaca) and their fate during alkaline pulping and TCF/ECF bleaching [PDF]
, 2010 The fate of lipophilic extractives from several nonwoody species (flax, hemp, sisal and abaca) used for the manufacturing of cellulose pulps, was studied during soda/anthraquinone (AQ) pulping and totally chorine free (TCF) and elemental chlorine free ...
Marques, Gisela +2 more
core +1 more source