SE0403222L - Method for oxygen delignification of cellulose pulp at high pressure in several steps - Google Patents

Method for oxygen delignification of cellulose pulp at high pressure in several steps

Info

Publication number
SE0403222L
SE0403222L SE0403222A SE0403222A SE0403222L SE 0403222 L SE0403222 L SE 0403222L SE 0403222 A SE0403222 A SE 0403222A SE 0403222 A SE0403222 A SE 0403222A SE 0403222 L SE0403222 L SE 0403222L
Authority
SE
Sweden
Prior art keywords
pulp
high pressure
reactor
dwell time
reactors
Prior art date
Application number
SE0403222A
Other languages
Swedish (sv)
Other versions
SE0403222D0 (en
SE526843C2 (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 SE0403222A priority Critical patent/SE526843C2/en
Publication of SE0403222D0 publication Critical patent/SE0403222D0/en
Priority to CA002553539A priority patent/CA2553539A1/en
Priority to US10/595,860 priority patent/US20090107642A1/en
Priority to BRPI0506684-0A priority patent/BRPI0506684A/en
Priority to PCT/SE2005/001366 priority patent/WO2006071165A1/en
Priority to JP2007549312A priority patent/JP2008527184A/en
Priority to EP05784562A priority patent/EP1831455A1/en
Publication of SE0403222L publication Critical patent/SE0403222L/en
Publication of SE526843C2 publication Critical patent/SE526843C2/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 reactor system includes a high pressure reactor part (R1-R3) in which the pulp spends a predetermined dwell time. - A continuous alkaline oxygen delignification of cooked and optionally washed (W1-W3) cellulose pulp which has been stored in a substantially atmospheric pressure tower or pit (ST), has an average consistency of 8-16% and has a kappa value of at least 15 units (preferably greater than 20) is carried out in a multi-reactor system (R1-R4) by adding alkali (NaOHMAIN) to obtain an initial pH greater than 9 and by adding 5-50 kg oxygen per tonne pulp in a position upstream from the first reactor. The dwell time for the pulp in the entire reactor system is greater than 45 minutes. The pulp is pressurised to an initial pressure of more than 15 bar in a high pressure part of the system, where the necessary chemicals are added and the initial mixing is carried out, then pulp is passed through at least two reactors with mixing stations (M1-M3) in between so that the pulp pressure is at least 13 bar as it leaves the final reactor in the high pressure part. The dwell time in the reactors = t1t2tx, where t1 is the dwell time in the reactor before the first mixing station (M1) and x is the number of high pressure reactors.
SE0403222A 2004-12-30 2004-12-30 Continuous alkaline oxygen delignification of pulp, using multi reactor system with high pressure reactor part SE526843C2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE0403222A SE526843C2 (en) 2004-12-30 2004-12-30 Continuous alkaline oxygen delignification of pulp, using multi reactor system with high pressure reactor part
CA002553539A CA2553539A1 (en) 2004-12-30 2005-09-20 A method for oxygen delignification of cellulose pulp at high pressure in several steps
US10/595,860 US20090107642A1 (en) 2004-12-30 2005-09-20 Method for oxygen delignification of cellulose pulp at high pressure in several steps
BRPI0506684-0A BRPI0506684A (en) 2004-12-30 2005-09-20 method for delignification by pulp oxygen in several steps under high pressure
PCT/SE2005/001366 WO2006071165A1 (en) 2004-12-30 2005-09-20 A method for oxygen delignification of cellulose pulp at high pressure in several steps
JP2007549312A JP2008527184A (en) 2004-12-30 2005-09-20 Several stages of cellulose pulp oxygen delignification process at high pressure
EP05784562A EP1831455A1 (en) 2004-12-30 2005-09-20 A method for oxygen delignification of cellulose pulp at high pressure in several steps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0403222A SE526843C2 (en) 2004-12-30 2004-12-30 Continuous alkaline oxygen delignification of pulp, using multi reactor system with high pressure reactor part

Publications (3)

Publication Number Publication Date
SE0403222D0 SE0403222D0 (en) 2004-12-30
SE0403222L true SE0403222L (en) 2005-11-08
SE526843C2 SE526843C2 (en) 2005-11-08

Family

ID=34102164

Family Applications (1)

Application Number Title Priority Date Filing Date
SE0403222A SE526843C2 (en) 2004-12-30 2004-12-30 Continuous alkaline oxygen delignification of pulp, using multi reactor system with high pressure reactor part

Country Status (7)

Country Link
US (1) US20090107642A1 (en)
EP (1) EP1831455A1 (en)
JP (1) JP2008527184A (en)
BR (1) BRPI0506684A (en)
CA (1) CA2553539A1 (en)
SE (1) SE526843C2 (en)
WO (1) WO2006071165A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI123023B (en) 2009-09-01 2012-10-15 Andritz Oy Method and apparatus for separating soap
FI126847B (en) * 2012-12-13 2017-06-15 Upm Kymmene Corp A process for the catalytic oxidation of cellulose and a process for preparing a cellulose product
SE540043C2 (en) * 2015-11-27 2018-03-06 Valmet Oy Method and system for oxygen delignification of cellulose pulp
DE102020002445A1 (en) 2020-04-23 2021-10-28 Messer Austria Gmbh Method and device for the production of bleached pulp

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
WO1997020983A1 (en) * 1995-12-07 1997-06-12 Beloit Technologies, Inc. Oxygen delignification of medium consistency pulp slurry

Also Published As

Publication number Publication date
US20090107642A1 (en) 2009-04-30
BRPI0506684A (en) 2007-05-02
EP1831455A1 (en) 2007-09-12
WO2006071165A1 (en) 2006-07-06
SE0403222D0 (en) 2004-12-30
CA2553539A1 (en) 2006-07-06
SE526843C2 (en) 2005-11-08
JP2008527184A (en) 2008-07-24

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