Results 81 to 90 of about 2,158 (213)
BioResources, 2016 Kraft mills have the potential to pre-extract hemicellulose from wood as another value added product. The impacts of pre-extracting xylan on pulp and handsheet properties, sodium and sulfur balances, and chemical make-ups in the kraft pulping process of ...
Andre J. Joubert +2 more
doaj +1 more source
Xylan Reactions in Kraft Cooking : Process and Product Considerations [PDF]
, 2007 Xylan is the main hemicellulose in birch, eucalyptus, and most other hardwood species. During kraft pulping a series of chemical reactions and physical processes involving xylan takes place.
Danielsson, Sverker
core
Influence of xylan content on the oxygen delignification performance of eucalypt kraft pulps as studied using prehydrolysis and xylanase treatments [PDF]
BioResources, 2012 Common metrics for evaluating the efficiency of oxygen delignification include the kappa number and Klason lignin content. As a change in xylan content often leads to a change in HexA content, the kappa number must be corrected for the HexA contribution ...
Helena Wedin +3 more
doaj
High sulphidity kraft pulping [PDF]
, 2009 The object of this project was to evaluate the effect of high sulphidity on the performance of the kraft cooking process. Softwood (SW) mix (50/50 of spruce, Picea abies, and pine, Pinus sylvestris) and a hardwood (HW: birch, Betula pendula) have been ...
Tormund, Disa, +2 more
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Kraft cooking with varying alkali concentration : Influence on TCF-bleachability [PDF]
, 1998 The TCF-bleachability of softwood pulps produced by kraft pulping processes with varying alkali concentrations was investigated. The cooks began with a hydrogen sulfide ion pretreatment at low alkalinity, i.e.
Sjöstrom, Karin,
core +1 more source
BioResources, 2012 Kraft pulping of hydrolyzed green bamboo (Dendrocalamopsis oldhami) chips was performed under various conditions to determine the effects of process variables (alkali charge, sulfidity, cooking temperature, and cooking time) on the dissolution of the ...
Xiaojuan Ma, +5 more
doaj
Carbohydrate degradation and dissolution during Kraft cooking [Elektronisk resurs] : Modelling of kinetic results [PDF]
, 2008 Chemical pulp fibres from wood are commonly used in products associated with packaging as well as with printing and writing. The prevalent way of liberating fibres is by subjecting wood chips to Kraft cooking.
Germgård, Ulf, +2 more
core
Thermal and Alkali Stability of Sodium Dithionite Studied Using ATR-FTIR Spectroscopy
BioResources, 2017 Sodium dithionite (Na2S2O4) may have the potential to be used as a reducing agent for the stabilization of glucomannan in kraft cooking for increased pulp yield.
Vijaya Lakshmi Vegunta +3 more
doaj +1 more source
Development of Continuous Cooking Process for Kraft Pulping
JAPAN TAPPI JOURNAL, 2008 カミヤ社が1949年に連続蒸解技術を開発して以来，連続蒸解技術が商業的に注目され始め，1980年代に入ると，異なったニーズに応じて多くの連続蒸解システムが開発された。その後，生産規模及び環境保全への対応，蒸解収率の向上，操業の安定化，漂白効率の改善，最終製品の品質要求を満たすパルプ品質確保のために，COMPACT COOKING™の連続蒸解システムが開発された。2000年代になると，パルプ製造の原料である木材チップと重油の高騰から製造コストの低減を目的とした蒸解プロセスを含むプロセス面での改善が試みられている。本稿では，まず連続蒸解釜の変遷，そしてクラフトパルプ法の連続蒸解プロセスの進歩を振り返る。次に1ベッセル気相／液相釜の低温蒸解技術が開発された背景，及びこの技術の特徴について紹介し ...
openaire +1 more source