WO2000019004A1 - Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier - Google Patents

Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier Download PDF

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Publication number
WO2000019004A1
WO2000019004A1 PCT/CA1999/000886 CA9900886W WO0019004A1 WO 2000019004 A1 WO2000019004 A1 WO 2000019004A1 CA 9900886 W CA9900886 W CA 9900886W WO 0019004 A1 WO0019004 A1 WO 0019004A1
Authority
WO
WIPO (PCT)
Prior art keywords
feedstock
pulp
reactor
steam explosion
semi
Prior art date
Application number
PCT/CA1999/000886
Other languages
English (en)
Inventor
Dennis D'agostino
Andrew Richard
Original Assignee
Stake Technology Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stake Technology Ltd. filed Critical Stake Technology Ltd.
Priority to AU58442/99A priority Critical patent/AU5844299A/en
Publication of WO2000019004A1 publication Critical patent/WO2000019004A1/fr
Priority to HK02103277.6A priority patent/HK1041612A1/zh

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/22—Other features of pulping processes
    • D21C3/224—Use of means other than pressure and temperature
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/36—Explosive disintegration by sudden pressure reduction
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C3/00—Pulping cellulose-containing materials
    • D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes

Definitions

  • This invention relates to a steam explosion pulping process.
  • this invention relates to a process for the delignification of lignocellulosic material in a semi-alkaline pulping liquor wherein the feed stock is treated by a steam explosion process.
  • the unbleached pulp may be bleached and treated to obtain bleached paper either at the same location as the unbleached pulp is produced or at another location.
  • the feed stock is exposed to steam explosion process conditions in the absence of yield enhancers.
  • yield enhancers which have been used in prior art processes include anthraquinone and polysulfides.
  • the instant process can produce an unbleached yield of up to 60% with a residence time of about 6 minutes without the use of anthraquinone. Further, such yields may be achieved with the pulp having a kappa number of 14.
  • the steam exploded pulp according to the instant invention has a lower shive content and higher fines content than both a Decker (screened) pulp and a belt washer (unscreened) pulp. Accordingly, the steam exploded pulp has a lower average fibre length. Surprisingly, despite the lower average fibre length, the steam exploded pulp produced according to the process of the instant invention demonstrated superior burst strength and breaking length, and slightly lower tear strength versus a decker pulp. Accordingly, the process of the instant invention produces a valuable commercial pulp in a process using as much as 25% less chemical loading.
  • the feedstock for the process of this invention may be any organic fibrous material which is known in the art for producing a cellulose pulp.
  • the feedstock may consist of any material containing cellulose and/or hemicellulose.
  • the feedstock comprises wood or non-wood fibrous material and more preferably bagasse, cereal straw, soft woods, hard woods, industrial crops such as kenaf, hemp and the like.
  • the feedstock is subjected to steam explosion process conditions in the presence of the semi-alkaline pulping chemicals.
  • the feedstock is first exposed to a semi-alkaline pulping liquor to produce a feedstock/liquor mixture. This mixture may then be subjected to the steam explosion process conditions.
  • the liquor may be separated from the feedstock prior to exposing the feedstock to the steam explosion process conditions.
  • the feedstock is preferably exposed to the semi-alkaline pulping liquor for a sufficient amount of time so that sufficient pulping chemicals from the liquor are absorbed into the feedstock to promote the delignification of the feedstock.
  • the feedstock may be exposed to the semi-alkaline pulping liquor such as by introducing the feedstock and the liquor into a vessel and allowing the feedstock to soak in the liquor for an extended period of time. Processes and equipment for conducting this step of the process are known in the art. After the feedstock has absorbed a sufficient amount of chemical to promote the delignification of the feedstock, the feedstock may then be subjected to steam explosion process conditions.
  • the residence time of the feedstock may be from about 4 to about 8 minutes, more preferably from about 4 to about 7 minutes and, most preferably, about 5 to about 6 minutes.
  • the semi-alkaline pulping liquor may comprise from about 4 to about 25, more preferably from about 6 to about 20 and, most preferably from about 8 to about 16 wt. % pulping chemicals based upon the total weight of the pulping liquor.
  • the pulping liquor comprises from about 0.5 to about 25, more preferably from about 1 to about 15 and, most preferably from about 2 to about 12 wt. % pulping chemicals based upon the total weight of the pulping liquor, expressed as Na 2 0 applied on an oven dried fibre basis.
  • the product of the steam explosion process is a low KAPPA pulp.
  • the pulp may have a KAPPA number from 12 - 16, preferably from 12 - 15, and most preferably from 12 to 14.
  • T the steam temperature in degrees C Samples of the impregnated bagasse where then subjected to steam explosion treatment according to the instant invention as well as a soda-AQ process and a SASAQ process.
  • the process conditions and the yield are set out in Table 1:
  • the steam explosion process had the highest severity factor (3.7 compared with 3.1 and 3.5 for the soda AQ and the SASAQ process respectively). Further, the steam explosion process did not use any anthraquinone. Despite this, the steam explosion process produced an unbleached yield of 60% which was comparable to that of the SASAQ (which used 0.05 wt. % AQ loading). Further, this was 10% higher than the unbleached yield of the soda-AQ process.
  • the 60% yield was achieved in substantially less time than the SASAQ process.
  • the SASAQ process required a residence time of 20 minutes.
  • the steam explosion process utilized a residence time of only six minutes. Accordingly, to obtain the same yield, the residence time of the steam explosion process is less than 1/3 that of the SASAQ process. Therefore, using the instant process, it would be possible to process approximately three times as much material as in the SASAQ process or, alternately, the process equipment could be about 1/3 the size.
  • the steam exploded pulp had a lower shive content (> 850 ⁇ m, versus both the Decker pulp and the belt washer pulp). Further, it also had a higher fines content, thus resulting in a lower average fibre length. Nevertheless, as can be seen from Table 4, the lower available fibre length did not adversely affect the strength of the pulp.
  • the steam exploded pulp showed superior burst strength and breaking length compared to the belt washer pulp and the Decker pulp with only a slightly lower tear strength compared to the Decker pulp.
  • the forgoing examples demonstrate that steam explosion pulping, at higher pressure and lower residence time, produced a pulp with strength, brightness and kappa number properties comparable to those of the soda-AQ and the SASAQ processes, and at a 60% unbleached yield. Further, this was achieved with lower chemical requirements compared to the SASAQ process.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

Procédé de production de pâte non blanchie apte à la production de papier blanchie à partir d'une charge d'alimentation consistant à soumettre la charge d'alimentation à un vapocraquage dans un réacteur à un pH semi-alcalin pour produire de la pâte de cellulose.
PCT/CA1999/000886 1998-09-25 1999-09-27 Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier WO2000019004A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU58442/99A AU5844299A (en) 1998-09-25 1999-09-27 Semi alkaline steam explosion treatment of fibrous material for the production of cellulose pulp
HK02103277.6A HK1041612A1 (zh) 1998-09-25 2002-05-02 用於生產纖維素紙漿的纖維狀材料半碱性蒸汽爆裂法處理

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/160,243 1998-09-25
US28898199A 1999-04-09 1999-04-09
US09/288,981 1999-04-09

Publications (1)

Publication Number Publication Date
WO2000019004A1 true WO2000019004A1 (fr) 2000-04-06

Family

ID=23109497

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CA1999/000886 WO2000019004A1 (fr) 1998-09-25 1999-09-27 Traitement de vapocraquage semi-alcalin de materiau fibreux pour la production de pate a papier

Country Status (1)

Country Link
WO (1) WO2000019004A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102166496A (zh) * 2011-03-22 2011-08-31 中国科学院过程工程研究所 原位汽爆方法及其装置
EP2374930A1 (fr) * 2008-12-09 2011-10-12 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd Papier brut, procédé de fabrication et application de celui-ci
EP2447415A1 (fr) * 2009-07-01 2012-05-02 Lignotech Developments Limited Traitement de matériaux lignocellulosiques apparentés
WO2014019043A2 (fr) 2012-08-01 2014-02-06 Centro Nacional De Pesquisa Em Energia Em Materias - Cnpem Procédé de conversion simultanée de bagasse de canne à sucre au moyen de réacteurs uhtst
WO2014072576A1 (fr) * 2012-11-07 2014-05-15 Metsä Fibre Oy Procédé pour l'ouverture de fibres contenant de la cellulose
CN104532641A (zh) * 2014-11-28 2015-04-22 武长安 植物纤维的节能、环保、资源化制浆方法
DE102017125090A1 (de) 2016-10-27 2018-05-03 PTT Global Chemical Public Company Ltd. Vorbehandlungsverfahren von lignocellulosehaltiger Biomasse mit alkalischer Lösung und Dampfexplosion
WO2021110188A1 (fr) * 2019-12-03 2021-06-10 Klingele Papierwerke Gmbh & Co. Kg Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259148A (en) * 1976-02-20 1981-03-31 The Price Company Limited Process for making refiner mechanical pulp
EP0172135A1 (fr) * 1984-07-17 1986-02-19 Rudy Vit Méthode, procédé et appareil pour la conversion du bois, des résidus de bois, des fibres végétales et de la biomasse en pâte
EP0284585A2 (fr) * 1987-03-24 1988-09-28 Stake Technology Ltd. Procédé de fabrication de pâte papetière
EP0444335A1 (fr) * 1987-09-17 1991-09-04 Tigney Technology Inc. Procédé pour l'obtention de cellulose blanchie mercerisée et non mercerisée, et pour produire du triacétate de cellulose
EP0501059A1 (fr) * 1991-02-28 1992-09-02 Bohuslav Vaclav Kokta Procédé de lessivage par explosion à la vapeur pour faire du papier
DE19730486A1 (de) * 1997-07-16 1999-01-21 Rhodia Acetow Ag Verfahren zur Behandlung von lignocellulosehaltiger Biomasse

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4259148A (en) * 1976-02-20 1981-03-31 The Price Company Limited Process for making refiner mechanical pulp
EP0172135A1 (fr) * 1984-07-17 1986-02-19 Rudy Vit Méthode, procédé et appareil pour la conversion du bois, des résidus de bois, des fibres végétales et de la biomasse en pâte
EP0284585A2 (fr) * 1987-03-24 1988-09-28 Stake Technology Ltd. Procédé de fabrication de pâte papetière
EP0444335A1 (fr) * 1987-09-17 1991-09-04 Tigney Technology Inc. Procédé pour l'obtention de cellulose blanchie mercerisée et non mercerisée, et pour produire du triacétate de cellulose
EP0501059A1 (fr) * 1991-02-28 1992-09-02 Bohuslav Vaclav Kokta Procédé de lessivage par explosion à la vapeur pour faire du papier
DE19730486A1 (de) * 1997-07-16 1999-01-21 Rhodia Acetow Ag Verfahren zur Behandlung von lignocellulosehaltiger Biomasse

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2374930A1 (fr) * 2008-12-09 2011-10-12 Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd Papier brut, procédé de fabrication et application de celui-ci
EP2374930A4 (fr) * 2008-12-09 2013-05-22 Shandong Fuyin Paper & Environmental Prot Technology Co Ltd Papier brut, procédé de fabrication et application de celui-ci
EP2447415A1 (fr) * 2009-07-01 2012-05-02 Lignotech Developments Limited Traitement de matériaux lignocellulosiques apparentés
EP2448731A4 (fr) * 2009-07-01 2016-07-27 Lignotech Developments Ltd Traitement de matériaux lignocellulosiques et matériaux apparentés
CN102166496A (zh) * 2011-03-22 2011-08-31 中国科学院过程工程研究所 原位汽爆方法及其装置
WO2014019043A2 (fr) 2012-08-01 2014-02-06 Centro Nacional De Pesquisa Em Energia Em Materias - Cnpem Procédé de conversion simultanée de bagasse de canne à sucre au moyen de réacteurs uhtst
WO2014072576A1 (fr) * 2012-11-07 2014-05-15 Metsä Fibre Oy Procédé pour l'ouverture de fibres contenant de la cellulose
CN104532641A (zh) * 2014-11-28 2015-04-22 武长安 植物纤维的节能、环保、资源化制浆方法
DE102017125090A1 (de) 2016-10-27 2018-05-03 PTT Global Chemical Public Company Ltd. Vorbehandlungsverfahren von lignocellulosehaltiger Biomasse mit alkalischer Lösung und Dampfexplosion
CN108004283A (zh) * 2016-10-27 2018-05-08 Ptt全球化学股份有限公司 使用碱性溶液和蒸汽爆炸的木质纤维素生物质的预处理过程
WO2021110188A1 (fr) * 2019-12-03 2021-06-10 Klingele Papierwerke Gmbh & Co. Kg Procédé et dispositif de production d'un matériau fibreux, comportant un système d'alimentation et un système à vis hélicoïdales

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