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SE9501897L - Process for delignification / bleaching of lignin-containing cellulose pulp - Google Patents

Process for delignification / bleaching of lignin-containing cellulose pulp

Info

Publication number
SE9501897L
SE9501897L SE9501897A SE9501897A SE9501897L SE 9501897 L SE9501897 L SE 9501897L SE 9501897 A SE9501897 A SE 9501897A SE 9501897 A SE9501897 A SE 9501897A SE 9501897 L SE9501897 L SE 9501897L
Authority
SE
Sweden
Prior art keywords
bleaching
cellulose pulp
lignin
chlorine
containing cellulose
Prior art date
Application number
SE9501897A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE504340E (en
SE9501897D0 (en
SE504340C2 (en
Inventor
Arne Roland Agnemo
Curt Bertil Haegglund
Original Assignee
Mo Och Domsjoe 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 Mo Och Domsjoe Ab filed Critical Mo Och Domsjoe Ab
Priority to SE9501897A priority Critical patent/SE504340E/en
Publication of SE9501897D0 publication Critical patent/SE9501897D0/en
Priority to PCT/SE1996/000619 priority patent/WO1996037654A1/en
Priority to AU57850/96A priority patent/AU5785096A/en
Publication of SE9501897L publication Critical patent/SE9501897L/en
Publication of SE504340C2 publication Critical patent/SE504340C2/en
Publication of SE504340E publication Critical patent/SE504340E/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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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)

Abstract

Bleaching sequences that are based on the use of essentially environmentally friendly bleaching agents often include numerous treatment stages, in which respective pH-values widely vary. From the aspect of liquid closed systems, this has a negative influence on the manufacture of bleached, including fully bleached, cellulose pulp as a whole. The present invention solves this problem and relates to a method of delignifying/bleaching a non-delignified/unbleached or predelignified/prebleached lignin-containing cellulose pulp. The method is characterized in that the cellulose pulp in one and the same stage is treated with a) complexing agent (Q); b) molybdenum-containing substance (Mo); c) chlorine-free oxidative bleaching agent, preferably a peroxide compound (P); and in that this treatment is followed by at least one bleaching stage in which a chlorine-free oxidative bleaching agent, preferably a peroxide compound (P), is used.
SE9501897A 1995-05-22 1995-05-22 Process for delignification / bleaching of lignin-containing cellulose pulp SE504340E (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
SE9501897A SE504340E (en) 1995-05-22 1995-05-22 Process for delignification / bleaching of lignin-containing cellulose pulp
PCT/SE1996/000619 WO1996037654A1 (en) 1995-05-22 1996-05-13 Bleaching of cellulose pulp in one and the same stage with a complexing agent, a molybdenum containing substance and an oxidative bleaching agent
AU57850/96A AU5785096A (en) 1995-05-22 1996-05-13 Bleaching of cellulose pulp in one and the same stage with a complexing agent, a molybdenum containing substance and an oxidative bleaching agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9501897A SE504340E (en) 1995-05-22 1995-05-22 Process for delignification / bleaching of lignin-containing cellulose pulp

Publications (4)

Publication Number Publication Date
SE9501897D0 SE9501897D0 (en) 1995-05-22
SE9501897L true SE9501897L (en) 1996-11-23
SE504340C2 SE504340C2 (en) 1997-01-20
SE504340E SE504340E (en) 1999-08-09

Family

ID=20398397

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9501897A SE504340E (en) 1995-05-22 1995-05-22 Process for delignification / bleaching of lignin-containing cellulose pulp

Country Status (3)

Country Link
AU (1) AU5785096A (en)
SE (1) SE504340E (en)
WO (1) WO1996037654A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CL2009000939A1 (en) 2008-04-30 2010-10-01 Evonik Degussa Gmbh Process to recover molybdate or tungstate from an aqueous solution that comprises a) contacting the solution with a cationized and water-insoluble inorganic carrier material, b) separating the carrier material from molybdate or tungstate, c) contacting it with an aqueous solution with a pH between 6 to 14 and d) separate the saturated material.
DE102010001001A1 (en) 2010-01-19 2011-07-21 Evonik Degussa GmbH, 45128 Process for delignification and bleaching of pulp
FR2969668B1 (en) * 2010-12-23 2013-01-04 Arkema France METHOD FOR DELIGNIFYING AND WHITENING PAPER PULP USING ACTIVE HYDROGEN PEROXIDE
EP3066257B1 (en) * 2013-11-06 2019-03-06 Evonik Degussa GmbH Method for delignifying and bleaching pulp
RU2634586C1 (en) * 2016-08-01 2017-10-31 федеральное государственное бюджетное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Method of bleaching hardwood sulphate cellulose
FI128968B (en) 2020-03-31 2021-04-15 Chempolis Oy Peroxide bleaching of cellulose pulp
RU2759613C1 (en) * 2021-03-22 2021-11-16 федеральное государственное автономное образовательное учреждение высшего образования "Пермский национальный исследовательский политехнический университет" Method for bleaching bisulphite cellulose

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
US4661205A (en) * 1981-08-28 1987-04-28 Scott Paper Company Method of bleaching lignocellulosic material with peroxide catalyzed with a salt of a metal
FI942968A (en) * 1994-06-20 1995-12-21 Kemira Chemicals Oy Process for delignifying a chemical pulp

Also Published As

Publication number Publication date
SE504340E (en) 1999-08-09
SE9501897D0 (en) 1995-05-22
WO1996037654A1 (en) 1996-11-28
AU5785096A (en) 1996-12-11
SE504340C2 (en) 1997-01-20

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Legal Events

Date Code Title Description
NUG Patent has lapsed