SE8800713L - SET FOR CELLULOSAMAS PREPARATION - Google Patents

SET FOR CELLULOSAMAS PREPARATION

Info

Publication number
SE8800713L
SE8800713L SE8800713A SE8800713A SE8800713L SE 8800713 L SE8800713 L SE 8800713L SE 8800713 A SE8800713 A SE 8800713A SE 8800713 A SE8800713 A SE 8800713A SE 8800713 L SE8800713 L SE 8800713L
Authority
SE
Sweden
Prior art keywords
cellulosamas
preparation
treatment
sulphur dioxide
pulp
Prior art date
Application number
SE8800713A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE466964B (en
SE8800713D0 (en
Inventor
S Backlund
O Bodin
P-O Lindblad
K S E Norden
Original Assignee
Sca Development Ab
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 Sca Development Ab filed Critical Sca Development Ab
Priority to SE8800713A priority Critical patent/SE466964B/en
Publication of SE8800713D0 publication Critical patent/SE8800713D0/en
Priority to AU29330/89A priority patent/AU2933089A/en
Priority to PCT/SE1988/000702 priority patent/WO1989008165A1/en
Publication of SE8800713L publication Critical patent/SE8800713L/en
Publication of SE466964B publication Critical patent/SE466964B/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds

Landscapes

  • Paper (AREA)

Abstract

In view of the environment requirements of today it is essential to be able to delignify cellulose pulp to a low kappa number prior to the bleaching of the pulp. According to the invention, this is achieved in that the wood raw material in the form of chips is subjected to a pre-treatment with sulphur dioxide. According to the invention, this is carried out by using the sulphur dioxide at the treatment in gaseous state at an overpressure of 0-5 bar.
SE8800713A 1988-03-01 1988-03-01 PRE-TREATMENT OF CHIP MEDIUM SULFUR Dioxide DURING SULPHAT Pulp PREPARATION SE466964B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE8800713A SE466964B (en) 1988-03-01 1988-03-01 PRE-TREATMENT OF CHIP MEDIUM SULFUR Dioxide DURING SULPHAT Pulp PREPARATION
AU29330/89A AU2933089A (en) 1988-03-01 1988-12-27 Process for the pre-treatment of chips
PCT/SE1988/000702 WO1989008165A1 (en) 1988-03-01 1988-12-27 Process for the pre-treatment of chips

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8800713A SE466964B (en) 1988-03-01 1988-03-01 PRE-TREATMENT OF CHIP MEDIUM SULFUR Dioxide DURING SULPHAT Pulp PREPARATION

Publications (3)

Publication Number Publication Date
SE8800713D0 SE8800713D0 (en) 1988-03-01
SE8800713L true SE8800713L (en) 1989-09-02
SE466964B SE466964B (en) 1992-05-04

Family

ID=20371539

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8800713A SE466964B (en) 1988-03-01 1988-03-01 PRE-TREATMENT OF CHIP MEDIUM SULFUR Dioxide DURING SULPHAT Pulp PREPARATION

Country Status (3)

Country Link
AU (1) AU2933089A (en)
SE (1) SE466964B (en)
WO (1) WO1989008165A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU778689B2 (en) * 2000-02-09 2004-12-16 Akzo Nobel N.V. Pulping process
US6752904B2 (en) 2000-02-09 2004-06-22 Akzo Nobel N.V. Process for removal of lignin from lignocellulosic material
EP1130155A1 (en) * 2000-03-01 2001-09-05 Akzo Nobel N.V. Pulping process
CA3078822A1 (en) 2017-11-09 2019-05-16 Iogen Corporation Low temperature sulfur dioxide pretreatment
CA3078833A1 (en) 2017-11-09 2019-05-16 Iogen Corporation Low temperature pretreatment with sulfur dioxide
WO2019191828A1 (en) 2018-04-06 2019-10-10 Iogen Corporation Pretreatment with lignosulfonic acid

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2190194A (en) * 1936-10-28 1940-02-13 Brown Co Chemical pulping of raw cellulosic material
US4211605A (en) * 1978-08-03 1980-07-08 Canadian International Paper Company High yield chemimechanical pulping processes

Also Published As

Publication number Publication date
SE466964B (en) 1992-05-04
AU2933089A (en) 1989-09-22
WO1989008165A1 (en) 1989-09-08
SE8800713D0 (en) 1988-03-01

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