SE9903344L - Cooking of pulp with special alkali profiles - Google Patents

Cooking of pulp with special alkali profiles

Info

Publication number
SE9903344L
SE9903344L SE9903344A SE9903344A SE9903344L SE 9903344 L SE9903344 L SE 9903344L SE 9903344 A SE9903344 A SE 9903344A SE 9903344 A SE9903344 A SE 9903344A SE 9903344 L SE9903344 L SE 9903344L
Authority
SE
Sweden
Prior art keywords
pulp
cooking
low
keeping
temperature
Prior art date
Application number
SE9903344A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9903344D0 (en
Inventor
C Bertil Stroemberg
Auvo K Kettunen
Jian Er Jiang
Kaj O Henricson
Original Assignee
Ahlstrom Machinery Inc
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 Ahlstrom Machinery Inc filed Critical Ahlstrom Machinery Inc
Publication of SE9903344D0 publication Critical patent/SE9903344D0/en
Publication of SE9903344L publication Critical patent/SE9903344L/en

Links

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
    • D21C7/00—Digesters
    • D21C7/14—Means for circulating the lye
    • 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
    • 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
    • D21C3/26—Multistage processes
    • 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
    • D21C7/00—Digesters
    • D21C7/10—Heating devices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)

Abstract

Yield, particularly when treating hardwood chips, can be improved by at least 1-2% in a kraft cellulose pulping process by keeping the temperature and effective alkali (EA) low during impregnation, and by keeping the EA low in at least a first cook stage. After cooking, the pulp is subjected to cooling low EA liquor, e.g. to reduce its temperature to below 120° C. (preferably below 100° C.) with an EA below about 5 g/L (expressed as NaOH). Continuous treatment in a continuous digester system is preferred, with the EA below about 20 g/L during impregnation and the first cook.
SE9903344A 1998-10-26 1999-09-17 Cooking of pulp with special alkali profiles SE9903344L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/178,512 US20010032711A1 (en) 1998-10-26 1998-10-26 Pulp cooking with particular alkali profiles

Publications (2)

Publication Number Publication Date
SE9903344D0 SE9903344D0 (en) 1999-09-17
SE9903344L true SE9903344L (en) 2000-04-27

Family

ID=22652828

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9903344A SE9903344L (en) 1998-10-26 1999-09-17 Cooking of pulp with special alkali profiles

Country Status (5)

Country Link
US (2) US20010032711A1 (en)
JP (1) JP3484382B2 (en)
CA (1) CA2282094A1 (en)
FI (1) FI19992291A (en)
SE (1) SE9903344L (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010032711A1 (en) * 1998-10-26 2001-10-25 C. Bertil Stromberg Pulp cooking with particular alkali profiles
SE518993E (en) * 2002-01-24 2013-04-23 Metso Paper Sweden Ab Preparation of cellulose pulp by boiling with a boiling liquid containing evaporated black liquor
US8317975B2 (en) * 2004-04-20 2012-11-27 The Research Foundation Of The State University Of New York Product and processes from an integrated forest biorefinery
US7771565B2 (en) * 2006-02-21 2010-08-10 Packaging Corporation Of America Method of pre-treating woodchips prior to mechanical pulping
US20070240837A1 (en) * 2006-04-13 2007-10-18 Andritz Inc. Hardwood alkaline pulping processes and systems
AT503610B1 (en) * 2006-05-10 2012-03-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
AT503611B1 (en) * 2006-05-10 2009-05-15 Chemiefaser Lenzing Ag METHOD FOR PRODUCING A PULP
US9260818B2 (en) * 2007-05-23 2016-02-16 Andritz Inc. Single vessel reactor system for hydrolysis and digestion of wood chips with chemical enhanced wash method
CA2638196C (en) 2007-08-07 2015-12-15 Andritz Inc. Method and system for semi-chemical pulping
US20090038767A1 (en) * 2007-08-07 2009-02-12 Andritz Inc. Method and System for Semi-Chemical Pulping
FI20105799A0 (en) * 2010-07-13 2010-07-13 Olli Joutsimo Improved chemical pulp manufacturing process
WO2016161515A1 (en) 2015-04-10 2016-10-13 Comet Biorefining Inc. Methods and compositions for the treatment of cellulosic biomass and products produced thereby
AU2019265921A1 (en) 2018-05-10 2020-11-26 Comet Biorefining Inc. Compositions comprising glucose and hemicellulose and their use
CN110512453B (en) * 2019-08-29 2021-11-26 乐恒香 Hard fiber curing system and pulping method thereof
SE546238C2 (en) * 2022-06-27 2024-07-23 Valmet Oy Method for processing cellulose pulp obtained from a kraft process

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE452482B (en) * 1982-04-28 1987-11-30 Sunds Defibrator PROCEDURE FOR BATCH PREPARATION OF SULPHATE Pulp WITH HIGH DEGREE
ATE125010T1 (en) * 1990-09-20 1995-07-15 Kvaerner Pulping Tech IMPACT WITH BLACK LYE BEFORE ADDING THE WHITE LYE.
SE500455C2 (en) * 1992-11-18 1994-06-27 Kamyr Ab Method of continuous cooking under elevated pressure and temperature of fiber material in a vertical digester
US5766413A (en) * 1993-04-23 1998-06-16 Kvaerner Pulping Ab Process for isothermal cooking pulp in a continuous digester
US5536366A (en) * 1993-05-04 1996-07-16 Ahlstrom Machinery Inc. Digester system for implementing low dissolved solids profiling
US5522958A (en) * 1994-07-18 1996-06-04 Pulp And Paper Research Institute Of Canada Two-stage kraft cooking
US5660686A (en) * 1994-09-02 1997-08-26 Ahlstrom Machinery Inc. Cooking with spent liquor pretreatment of cellulose material
US5690788A (en) * 1994-10-11 1997-11-25 James River Corporation Of Virginia Biaxially undulatory tissue and creping process using undulatory blade
US5935026A (en) * 1994-11-18 1999-08-10 Sports Licensing, Inc. Lacrosse stick and head frame therefor
US5674359A (en) * 1995-02-08 1997-10-07 Ahlstrom Machinery Inc. Continuous cooking of cellulosic fibrous material with cold alkali impregnation
US5635026A (en) * 1995-11-13 1997-06-03 Ahlstrom Machinery Inc. Cooking cellulose material with high alkali concentrations and/or high pH
US5958181A (en) * 1997-08-07 1999-09-28 Ahlstrom Machinery, Inc. Continuous cooking with a two-stage cool impregnation
US20010032711A1 (en) * 1998-10-26 2001-10-25 C. Bertil Stromberg Pulp cooking with particular alkali profiles
US6576084B1 (en) * 1999-09-13 2003-06-10 Andritz Inc. Method of pretreating pulp with yield or strength-enhancing additive
WO2004106624A1 (en) * 2003-06-03 2004-12-09 Pacific Pulp Resources Inc. Method for producing pulp and lignin

Also Published As

Publication number Publication date
FI19992291A (en) 2000-04-26
JP3484382B2 (en) 2004-01-06
CA2282094A1 (en) 2000-04-26
US20050087314A1 (en) 2005-04-28
SE9903344D0 (en) 1999-09-17
US20010032711A1 (en) 2001-10-25
JP2000129586A (en) 2000-05-09

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Legal Events

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