NO933873L - Process of bleaching lignocellulosic pulp - Google Patents

Process of bleaching lignocellulosic pulp

Info

Publication number
NO933873L
NO933873L NO933873A NO933873A NO933873L NO 933873 L NO933873 L NO 933873L NO 933873 A NO933873 A NO 933873A NO 933873 A NO933873 A NO 933873A NO 933873 L NO933873 L NO 933873L
Authority
NO
Norway
Prior art keywords
pulp
bleaching
peroxide
initial treatment
magnesium
Prior art date
Application number
NO933873A
Other languages
Norwegian (no)
Other versions
NO302766B1 (en
NO933873D0 (en
Inventor
Lillemor Holtinger
Wenche Hermansson
Lennart Andersson
Jiri Basta
Magnus Linsten
Original Assignee
Eka Nobel 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20387625&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=NO933873(L) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of NO933873D0 publication Critical patent/NO933873D0/en
Publication of NO933873L publication Critical patent/NO933873L/en
Publication of NO302766B1 publication Critical patent/NO302766B1/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
    • D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the 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
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Stringed Musical Instruments (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

The present invention relates to a process for bleaching of lignocellulose-containing pulp, in which the pulp is treated at a pH between about 1 and about 7 in the presence of a magnesium compound, whereupon the pulp is washed and subsequently bleached with a peroxide-containing compound. The initial treatment removes from the pulp those trace metal ions that have a negative effect on the subsequent bleaching with a peroxide-containing compound. Owing to the presence of magnesium ions in dissolved form during the initial treatment, the magnesium ions are retained in those positions in the pulp where they have a particularly positive effect on the effectiveness of the bleaching stage.
NO933873A 1992-10-29 1993-10-27 Process of bleaching lignocellulosic pulp NO302766B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9203200A SE512137C2 (en) 1992-10-29 1992-10-29 Process for bleaching lignocellulosic pulp

Publications (3)

Publication Number Publication Date
NO933873D0 NO933873D0 (en) 1993-10-27
NO933873L true NO933873L (en) 1994-05-02
NO302766B1 NO302766B1 (en) 1998-04-20

Family

ID=20387625

Family Applications (1)

Application Number Title Priority Date Filing Date
NO933873A NO302766B1 (en) 1992-10-29 1993-10-27 Process of bleaching lignocellulosic pulp

Country Status (16)

Country Link
EP (1) EP0595386B2 (en)
JP (1) JPH06207392A (en)
AT (1) ATE180523T1 (en)
AU (1) AU659039B2 (en)
BR (1) BR9304438A (en)
CA (1) CA2109179A1 (en)
CZ (1) CZ284366B6 (en)
DE (1) DE69325070D1 (en)
FI (1) FI934705A (en)
MX (1) MX9306618A (en)
NO (1) NO302766B1 (en)
NZ (1) NZ250050A (en)
RU (1) RU2072014C1 (en)
SE (1) SE512137C2 (en)
SK (1) SK117593A3 (en)
ZA (1) ZA937908B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3724033B2 (en) * 1996-01-30 2005-12-07 住友電気工業株式会社 High-strength, high-heat-resistant aluminum alloy and its manufacturing method, conductive wire and overhead wire
AUPP476398A0 (en) * 1998-07-21 1998-08-13 Orica Australia Pty Ltd Bleaching process
DE102009050570B4 (en) 2008-10-23 2017-07-06 Bene_Fit Systems Gmbh & Co. Kg Production process for bleached organic fiber materials and use of a bleaching agent

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US422819A (en) * 1890-03-04 Frederick j
US2687943A (en) * 1951-06-26 1954-08-31 Du Pont Bleaching of mechanical wood pulp
US3507744A (en) * 1966-04-01 1970-04-21 Kimberly Clark Co Wood pulp bleaching process utilizing peroxide pyrophosphate high concentration compositions
JPS51102103A (en) * 1975-03-05 1976-09-09 Nippon Parupu Kogyo Kk Ryusanenhoparupuno hyohakuhoho
JPS583074B2 (en) * 1975-11-17 1983-01-19 三菱瓦斯化学株式会社 Palpuno Kasan Kabutsu Hiyou Hakuhou
SE420430B (en) † 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
JPS5927436B2 (en) * 1979-05-29 1984-07-05 王子製紙株式会社 Peroxide bleaching method for wood pulp
JPS5721590A (en) * 1980-07-11 1982-02-04 Mitsubishi Gas Chemical Co Peroxide bleaching of wood pulp
FR2520397A1 (en) * 1982-01-28 1983-07-29 Centre Tech Ind Papier PROCESS FOR TREATING CHEMICAL PAPER PASTES
AT380496B (en) * 1984-06-27 1986-05-26 Steyrermuehl Papier METHOD AND REACTOR FOR DELIGNIFYING CELLULAR WITH OXYGEN
JP2827235B2 (en) * 1988-11-22 1998-11-25 三菱瓦斯化学株式会社 High yield pulp bleaching process.
JPH0364589A (en) * 1989-07-28 1991-03-19 Mitsubishi Gas Chem Co Inc Bleaching of chemical pulp
US5091054A (en) † 1989-08-18 1992-02-25 Degussa Corporation Process for bleaching and delignification of lignocellulosic
CA2053035C (en) † 1990-10-12 1997-09-30 Repap Enterprises Inc. Chlorine-free wood pulps and process of making
SE470065C (en) * 1991-04-30 1996-01-15 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching

Also Published As

Publication number Publication date
SK117593A3 (en) 1994-05-11
SE512137C2 (en) 2000-01-31
NO302766B1 (en) 1998-04-20
AU659039B2 (en) 1995-05-04
EP0595386B1 (en) 1999-05-26
SE9203200L (en) 1994-04-30
CZ284366B6 (en) 1998-11-11
EP0595386B2 (en) 2002-07-17
SE9203200D0 (en) 1992-10-29
CA2109179A1 (en) 1994-04-30
AU4919993A (en) 1994-05-12
RU2072014C1 (en) 1997-01-20
FI934705A (en) 1994-04-30
NO933873D0 (en) 1993-10-27
DE69325070D1 (en) 1999-07-01
BR9304438A (en) 1994-05-03
ZA937908B (en) 1994-05-24
JPH06207392A (en) 1994-07-26
CZ224193A3 (en) 1994-05-18
NZ250050A (en) 1994-12-22
ATE180523T1 (en) 1999-06-15
MX9306618A (en) 1994-04-29
EP0595386A1 (en) 1994-05-04
FI934705A0 (en) 1993-10-25

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