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SE0403202L - Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals - Google Patents

Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals

Info

Publication number
SE0403202L
SE0403202L SE0403202A SE0403202A SE0403202L SE 0403202 L SE0403202 L SE 0403202L SE 0403202 A SE0403202 A SE 0403202A SE 0403202 A SE0403202 A SE 0403202A SE 0403202 L SE0403202 L SE 0403202L
Authority
SE
Sweden
Prior art keywords
pulp
pressure
run
delignification
dwell time
Prior art date
Application number
SE0403202A
Other languages
Swedish (sv)
Other versions
SE0403202D0 (en
SE526707C2 (en
Inventor
Vidar Snekkenes
Jonas Saetheraasen
Lennart Gustavsson
Martin Ragnar
Original Assignee
Kvaerner Pulping Tech
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 Kvaerner Pulping Tech filed Critical Kvaerner Pulping Tech
Priority to SE0403202A priority Critical patent/SE0403202L/en
Publication of SE0403202D0 publication Critical patent/SE0403202D0/en
Priority to BRPI0506424-4A priority patent/BRPI0506424A/en
Priority to CA002559362A priority patent/CA2559362A1/en
Priority to EP05777705A priority patent/EP1834034A4/en
Priority to PCT/SE2005/001274 priority patent/WO2006071163A1/en
Priority to JP2007549311A priority patent/JP2008527183A/en
Priority to US10/595,839 priority patent/US20080271861A1/en
Publication of SE526707C2 publication Critical patent/SE526707C2/en
Publication of SE0403202L publication Critical patent/SE0403202L/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

The pulp is passed through a high-pressure delignification reactor run (R1-R3) and then depressurized and heated with steam before being supplied to a reactor system (R4) in a low-pressure run where the dwell time is greater than that in the high-pressure run. - A continuous process for the alkaline oxygen gas delignification of cellulose pulp which has been cooked and optionally washed (W1) after cooking and which is stored in a substantially atmospheric storage tower (ST) or pulp tank, comprises the use of a reactor system with multiple oxygen gas reactors. The pulp being delignified has a consistency of 8-18 % and a kappa value of at least 15 (more than 20). During delignification, alkali (NaOHMAIN) is added to the pulp to provide a starting pH of more than 9 and 5-50 kg oxygen per tonne pulp is added at a point before the first oxygen gas reactor in the system. The total dwell time for the pulp in the system is more than 45 minutes. The pulp is pressurized to a starting pressure of more than 15 bar during the initial addition of chemicals and initial mixing in required for delignification, then the pulp is supplied to multiple mixing locations (M1-M3), the pressure in the final location being at least 13 bar. The dwell time in this first high-pressure run is at least 3-10 minutes. The pulp is then depressurized to less than 10-12 bar, heated with steam in order to increase its temperature by at least 5 deg. C and then supplied to a reactor system in a low-pressure run where the dwell time is greater than that in the high-pressure run.
SE0403202A 2004-12-30 2004-12-30 Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals SE0403202L (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE0403202A SE0403202L (en) 2004-12-30 2004-12-30 Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals
BRPI0506424-4A BRPI0506424A (en) 2004-12-30 2005-09-05 method for oxygen delignification of cellulose pulp by mixing chemicals
CA002559362A CA2559362A1 (en) 2004-12-30 2005-09-05 Method for oxygen delignification of cellulose pulp by mixing of chemicals
EP05777705A EP1834034A4 (en) 2004-12-30 2005-09-05 Method for oxygen delignification of cellulose pulp by mixing of chemicals
PCT/SE2005/001274 WO2006071163A1 (en) 2004-12-30 2005-09-05 Method for oxygen delignification of cellulose pulp by mixing of chemicals
JP2007549311A JP2008527183A (en) 2004-12-30 2005-09-05 Process for delignification of cellulose pulp with oxygen by mixing chemicals
US10/595,839 US20080271861A1 (en) 2004-12-30 2005-09-05 Method for Oxygen Delignification of Cellulose Pulp by Mixing of Chemicals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0403202A SE0403202L (en) 2004-12-30 2004-12-30 Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals

Publications (3)

Publication Number Publication Date
SE0403202D0 SE0403202D0 (en) 2004-12-30
SE526707C2 SE526707C2 (en) 2005-10-25
SE0403202L true SE0403202L (en) 2005-10-25

Family

ID=34102144

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0403202A SE0403202L (en) 2004-12-30 2004-12-30 Method for oxygen delignification of cellulose pulp with high-pressure mixing of chemicals

Country Status (7)

Country Link
US (1) US20080271861A1 (en)
EP (1) EP1834034A4 (en)
JP (1) JP2008527183A (en)
BR (1) BRPI0506424A (en)
CA (1) CA2559362A1 (en)
SE (1) SE0403202L (en)
WO (1) WO2006071163A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100317053A1 (en) * 2009-06-15 2010-12-16 Andritz Inc. Process machinery for feeding pre-treated lignocellulosic materials into bioreactors for bio-fuels and biochemicals
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4363697A (en) * 1979-12-03 1982-12-14 The Black Clawson Company Method for medium consistency oxygen delignification of pulp
US5217575A (en) * 1988-10-18 1993-06-08 Kamyr Ab Process for oxygen bleaching using two vertical reactors
US5460696A (en) * 1993-08-12 1995-10-24 The Boc Group, Inc. Oxygen delignification method incorporating wood pulp mixing apparatus
SE9401628L (en) * 1994-05-10 1995-11-11 Stora Kopparbergs Bergslags Ab Oxygen delignification procedure
US6319357B1 (en) * 1995-10-23 2001-11-20 Valmet Fibertech Aktiebolag Method for two-stage oxygen bleaching and delignification of chemical pulp
SE505141C2 (en) * 1995-10-23 1997-06-30 Sunds Defibrator Ind Ab Oxygen delignification of pulp in two stages with high loading of alkali and oxygen and temperature below 90 C in the first step
ATE214113T1 (en) * 1995-12-07 2002-03-15 Beloit Technologies Inc DELIGNIFICATION OF MEDIUM CONSISTENCY PULP USING OXYGEN
SE510740C2 (en) * 1996-11-26 1999-06-21 Sunds Defibrator Ind Ab Oxygen delignification control
SE522593C2 (en) * 1999-07-06 2004-02-24 Kvaerner Pulping Tech Oxygen gas delignification system and method of pulp of lignocellulosic material

Also Published As

Publication number Publication date
EP1834034A1 (en) 2007-09-19
SE0403202D0 (en) 2004-12-30
EP1834034A4 (en) 2012-12-19
WO2006071163A1 (en) 2006-07-06
BRPI0506424A (en) 2006-12-26
US20080271861A1 (en) 2008-11-06
JP2008527183A (en) 2008-07-24
SE526707C2 (en) 2005-10-25
CA2559362A1 (en) 2006-07-06

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Legal Events

Date Code Title Description
NUG Patent has lapsed